Aria2中文说明文档

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配置

注意

大部分 FTP 参数对 SFTP 同样适用,只有少部分参数例外(例如 --ftp-pasv)。

基本

-d, --dir=<DIR>

下载目录。

-i, --input-file=<FILE>

下载 FILE 中的所有 URI。
把多个 URI 放在同一行,并使用 TAB 分割,可以为下载对象设置多个源。
也可以为每个 URI 增加配置,配置行必须以空白符(SPACETAB)开始,并且每行只能包含一个配置。
FILE 可以使用 gzip 压缩。
FILE- 时,aria2 使用 stdin 方式读取。
参考 Input File, 参考 --deferred-input 选项, 参考 --save-session 选项。

-l, --log=<LOG>

日志文件的名字。
当是 - 时,日志将输出到 stdout
当是空字符串(""),或没有配置该选项时,将不会写任何的日志。

-j, --max-concurrent-downloads=<N>

最多同时下载的任务数。
参考 --split 配置。
默认 5

注意

--max-concurrent-downloads 限制当前同时下载的任务数。
--split--min-split-size 限制每个下载任务的连接数。
假如你有一个输入文件(使用 --input-file 配置):

http://example.com/foo
http://example.com/bar
                        

这是两个下载任务。
--max-concurrent-downloads 配置大于或等于 2 时,aria2 可以同时下载这两个任务。
在每个下载任务中,可以使用 --split 和 / 或 --min-split-size 来设置使用的链接数。

-V, --check-integrity [true|false]

通过检查片的 hash 或整个文件的 hash 来校验下载文件的完整性。
该选项只对 BitTorrent 下载任务有效,Metalink 和 HTTP(S)/FTP 下载任务需使用 --checksum 选项。
如果返回片的 hash,可以重新单独下载损坏的片。
如果返回整个文件的 hash,只会在下载完成后校验 hash。
是否分片取决于文件的大小。
如果 hash 校验失败,文件从断裂处重新下载。
如果同时返回了整个文件的 hash 和每个片的 hash,使用片的 hash。
默认 false

-c, --continue [true|false]

继续下载文件的剩余部分。
目前只对 HTTP(S)/FTP 下载任务有效。

-h, --help[=<TAG>|<KEYWORD>]

帮助信息使用标签分类。
标签由 # 开头。
例如,输入 --help=#http 来获取 #http 相关的配置用法。
如果表情不以 # 开头,获取与输入字符匹配的配置。
可用值有:#basic#advanced#http#https#ftp#metalink#bittorrent#cookie#hook#file#rpc#checksum#experimental#deprecated#help#all
默认 #basic

HTTP/FTP/SFTP

--all-proxy=<PROXY>

Use a proxy server for all protocols. To override a previously defined proxy, use "". You also can override this setting and specify a proxy server for a particular protocol using --http-proxy, --https-proxy and --ftp-proxy options. This affects all downloads. The format of PROXY is [http://][USER:PASSWORD@]HOST[:PORT]. See also ENVIRONMENT section.

注意

If user and password are embedded in proxy URI and they are also specified by --{http,https,ftp,all}-proxy-{user,passwd} options, those specified later override prior options. For example, if you specified http-proxy-user=myname, http-proxy-passwd=mypass in aria2.conf and you specified --http-proxy="http://proxy" on the command-line, then you'd get HTTP proxy http://proxy with user myname and password mypass.

Another example: if you specified on the command-line --http-proxy="http://user:pass@proxy" --http-proxy-user="myname" --http-proxy-passwd="mypass", then you'd get HTTP proxy http://proxy with user myname and password mypass.

One more example: if you specified in command-line --http-proxy-user="myname" --http-proxy-passwd="mypass" --http-proxy="http://user:pass@proxy", then you'd get HTTP proxy http://proxy with user user and password pass.

--all-proxy-passwd=<PASSWD>

Set password for --all-proxy option.

--all-proxy-user=<USER>

Set user for --all-proxy option.

--checksum=<TYPE>=<DIGEST>

Set checksum. TYPE is hash type. The supported hash type is listed in Hash Algorithms in aria2c -v. DIGEST is hex digest. For example, setting sha-1 digest looks like this: sha-1=0192ba11326fe2298c8cb4de616f4d4140213838 This option applies only to HTTP(S)/FTP downloads.

--connect-timeout=<SEC>

Set the connect timeout in seconds to establish connection to HTTP/FTP/proxy server. After the connection is established, this option makes no effect and --timeout option is used instead. Default: 60

--dry-run [true|false]

If true is given, aria2 just checks whether the remote file is available and doesn't download data. This option has effect on HTTP/FTP download. BitTorrent downloads are canceled if true is specified. Default: false

--lowest-speed-limit=<SPEED>

Close connection if download speed is lower than or equal to this value(bytes per sec). 0 means aria2 does not have a lowest speed limit. You can append K or M (1K = 1024, 1M = 1024K). This option does not affect BitTorrent downloads. Default: 0

-x, --max-connection-per-server=<NUM>

The maximum number of connections to one server for each download. Default: 1

--max-file-not-found=<NUM>

If aria2 receives "file not found" status from the remote HTTP/FTP servers NUM times without getting a single byte, then force the download to fail. Specify 0 to disable this option. This options is effective only when using HTTP/FTP servers. The number of retry attempt is counted toward --max-tries, so it should be configured too.

Default: 0

-m, --max-tries=<N>

Set number of tries. 0 means unlimited. See also --retry-wait. Default: 5

-k, --min-split-size=<SIZE>

aria2 does not split less than 2*SIZE byte range. For example, let's consider downloading 20MiB file. If SIZE is 10M, aria2 can split file into 2 range [0-10MiB) and [10MiB-20MiB) and download it using 2 sources(if --split >= 2, of course). If SIZE is 15M, since 2*15M > 20MiB, aria2 does not split file and download it using 1 source. You can append K or M (1K = 1024, 1M = 1024K). Possible Values: 1M -1024M Default: 20M

--netrc-path=<FILE>

Specify the path to the netrc file. Default: $(HOME)/.netrc

注意

Permission of the .netrc file must be 600. Otherwise, the file will be ignored.

-n, --no-netrc [true|false]

Disables netrc support. netrc support is enabled by default.

注意

netrc file is only read at the startup if --no-netrc is false. So if --no-netrc is true at the startup, no netrc is available throughout the session. You cannot get netrc enabled even if you send --no-netrc=false using aria2.changeGlobalOption().

--no-proxy=<DOMAINS>

Specify a comma separated list of host names, domains and network addresses with or without a subnet mask where no proxy should be used.

注意

For network addresses with a subnet mask, both IPv4 and IPv6 addresses work. The current implementation does not resolve the host name in an URI to compare network addresses specified in --no-proxy. So it is only effective if URI has numeric IP addresses.

-o, --out=<FILE>

The file name of the downloaded file. It is always relative to the directory given in --dir option. When the --force-sequential option is used, this option is ignored.

注意

You cannot specify a file name for Metalink or BitTorrent downloads. The file name specified here is only used when the URIs fed to aria2 are given on the command line directly, but not when using --input-file, --force-sequential option.

Example:

$ aria2c -o myfile.zip "http://mirror1/file.zip" "http://mirror2/file.zip"
                        
--proxy-method=<METHOD>

Set the method to use in proxy request. METHOD is either get or tunnel. HTTPS downloads always use tunnel regardless of this option. Default: get

-R, --remote-time [true|false]

Retrieve timestamp of the remote file from the remote HTTP/FTP server and if it is available, apply it to the local file. Default: false

--reuse-uri [true|false]

Reuse already used URIs if no unused URIs are left. Default: true

--retry-wait=<SEC>

Set the seconds to wait between retries. When SEC > 0, aria2 will retry downloads when the HTTP server returns a 503 response. Default: 0

--server-stat-of=<FILE>

Specify the file name to which performance profile of the servers is saved. You can load saved data using --server-stat-if option. See Server Performance Profile subsection below for file format.

--server-stat-if=<FILE>

Specify the file name to load performance profile of the servers. The loaded data will be used in some URI selector such as feedback. See also --uri-selector option. See Server Performance Profile subsection below for file format.

--server-stat-timeout=<SEC>

Specifies timeout in seconds to invalidate performance profile of the servers since the last contact to them. Default: 86400 (24hours)

-s, --split=<N>

Download a file using N connections. If more than N URIs are given, first N URIs are used and remaining URIs are used for backup. If less than N URIs are given, those URIs are used more than once so that N connections total are made simultaneously. The number of connections to the same host is restricted by the --max-connection-per-server option. See also the --min-split-size option. Default: 5

注意

Some Metalinks regulate the number of servers to connect. aria2 strictly respects them. This means that if Metalink defines the maxconnections attribute lower than N, then aria2 uses the value of this lower value instead of N.

--stream-piece-selector=<SELECTOR>

Specify piece selection algorithm used in HTTP/FTP download. Piece means fixed length segment which is downloaded in parallel in segmented download. If default is given, aria2 selects piece so that it reduces the number of establishing connection. This is reasonable default behavior because establishing connection is an expensive operation. If inorder is given, aria2 selects piece which has minimum index. Index=0 means first of the file. This will be useful to view movie while downloading it. --enable-http-pipelining option may be useful to reduce re-connection overhead. Please note that aria2 honors --min-split-size option, so it will be necessary to specify a reasonable value to --min-split-size option. If random is given, aria2 selects piece randomly. Like inorder, --min-split-size option is honored. If geom is given, at the beginning aria2 selects piece which has minimum index like inorder, but it exponentially increasingly keeps space from previously selected piece. This will reduce the number of establishing connection and at the same time it will download the beginning part of the file first. This will be useful to view movie while downloading it. Default: default

-t, --timeout=<SEC>

Set timeout in seconds. Default: 60

--uri-selector=<SELECTOR>

Specify URI selection algorithm. The possible values are inorder, feedback and adaptive. If inorder is given, URI is tried in the order appeared in the URI list. If feedback is given, aria2 uses download speed observed in the previous downloads and choose fastest server in the URI list. This also effectively skips dead mirrors. The observed download speed is a part of performance profile of servers mentioned in --server-stat-of and --server-stat-if options. If adaptive is given, selects one of the best mirrors for the first and reserved connections. For supplementary ones, it returns mirrors which has not been tested yet, and if each of them has already been tested, returns mirrors which has to be tested again. Otherwise, it doesn't select anymore mirrors. Like feedback, it uses a performance profile of servers. Default: feedback

HTTP

--ca-certificate=<FILE>

Use the certificate authorities in FILE to verify the peers. The certificate file must be in PEM format and can contain multiple CA certificates. Use --check-certificate option to enable verification.

注意

If you build with OpenSSL or the recent version of GnuTLS which has gnutls_certificate_set_x509_system_trust() function and the library is properly configured to locate the system-wide CA certificates store, aria2 will automatically load those certificates at the startup.

注意

WinTLS and AppleTLS do not support this option. Instead you will have to import the certificate into the OS trust store.

--certificate=<FILE>

Use the client certificate in FILE. The certificate must be either in PKCS12 (.p12, .pfx) or in PEM format.

PKCS12 files must contain the certificate, a key and optionally a chain of additional certificates. Only PKCS12 files with a blank import password can be opened!

When using PEM, you have to specify the private key via --private-key as well.

注意

WinTLS does not support PEM files at the moment. Users have to use PKCS12 files.

注意

AppleTLS users should use the KeyChain Access utility to import the client certificate and get the SHA-1 fingerprint from the Information dialog corresponding to that certificate. To start aria2c use --certificate=<SHA-1>. Alternatively PKCS12 files are also supported. PEM files, however, are not supported.

--check-certificate [true|false]

Verify the peer using certificates specified in --ca-certificate option. Default: true

--http-accept-gzip [true|false]

Send Accept: deflate, gzip request header and inflate response if remote server responds with Content-Encoding: gzip or Content-Encoding: deflate. Default: false

注意

Some server responds with Content-Encoding: gzip for files which itself is gzipped file. aria2 inflates them anyway because of the response header.

--http-auth-challenge [true|false]

Send HTTP authorization header only when it is requested by the server. If false is set, then authorization header is always sent to the server. There is an exception: if user name and password are embedded in URI, authorization header is always sent to the server regardless of this option. Default: false

--http-no-cache [true|false]

Send Cache-Control: no-cache and Pragma: no-cache header to avoid cached content. If false is given, these headers are not sent and you can add Cache-Control header with a directive you like using --header option. Default: false

--http-user=<USER>

Set HTTP user. This affects all URIs.

--http-passwd=<PASSWD>

Set HTTP password. This affects all URIs.

--http-proxy=<PROXY>

Use a proxy server for HTTP. To override a previously defined proxy, use "". See also the --all-proxy option. This affects all http downloads. The format of PROXY is [http://][USER:PASSWORD@]HOST[:PORT]

--http-proxy-passwd=<PASSWD>

Set password for --http-proxy.

--http-proxy-user=<USER>

Set user for --http-proxy.

--https-proxy=<PROXY>

Use a proxy server for HTTPS. To override a previously defined proxy, use "". See also the --all-proxy option. This affects all https download. The format of PROXY is [http://][USER:PASSWORD@]HOST[:PORT]

--https-proxy-passwd=<PASSWD>

Set password for --https-proxy.

--https-proxy-user=<USER>

Set user for --https-proxy.

--private-key=<FILE>

Use the private key in FILE. The private key must be decrypted and in PEM format. The behavior when encrypted one is given is undefined. See also --certificate option.

--referer=<REFERER>

Set an http referrer (Referer). This affects all http/https downloads. If * is given, the download URI is also used as the referrer. This may be useful when used together with the --parameterized-uri option.

--enable-http-keep-alive [true|false]

Enable HTTP/1.1 persistent connection. Default: true

--enable-http-pipelining [true|false]

Enable HTTP/1.1 pipelining. Default: false

注意

In performance perspective, there is usually no advantage to enable this option.

--header=<HEADER>

Append HEADER to HTTP request header. You can use this option repeatedly to specify more than one header:

$ aria2c --header="X-A: b78" --header="X-B: 9J1" "http://host/file"
                      
--load-cookies=<FILE>

Load Cookies from FILE using the Firefox3 format (SQLite3), Chromium/Google Chrome (SQLite3) and the Mozilla/Firefox(1.x/2.x)/Netscape format.

注意

If aria2 is built without libsqlite3, then it doesn't support Firefox3 and Chromium/Google Chrome cookie format.

--save-cookies=<FILE>

Save Cookies to FILE in Mozilla/Firefox(1.x/2.x)/ Netscape format. If FILE already exists, it is overwritten. Session Cookies are also saved and their expiry values are treated as 0. Possible Values: /path/to/file

--use-head [true|false]

Use HEAD method for the first request to the HTTP server. Default: false

-U, --user-agent=<USER_AGENT>

Set user agent for HTTP(S) downloads. Default: aria2/$VERSION, $VERSION is replaced by package version.

FTP/SFTP

--ftp-user=<USER>

Set FTP user. This affects all URIs. Default: anonymous

--ftp-passwd=<PASSWD>

Set FTP password. This affects all URIs. If user name is embedded but password is missing in URI, aria2 tries to resolve password using .netrc. If password is found in .netrc, then use it as password. If not, use the password specified in this option. Default: ARIA2USER@

-p, --ftp-pasv [true|false]

Use the passive mode in FTP. If false is given, the active mode will be used. Default: true

注意

This option is ignored for SFTP transfer.

--ftp-proxy=<PROXY>

Use a proxy server for FTP. To override a previously defined proxy, use "". See also the --all-proxy option. This affects all ftp downloads. The format of PROXY is [http://][USER:PASSWORD@]HOST[:PORT]

--ftp-proxy-passwd=<PASSWD>

Set password for --ftp-proxy option.

--ftp-proxy-user=<USER>

Set user for --ftp-proxy option.

--ftp-type=<TYPE>

Set FTP transfer type. TYPE is either binary or ascii. Default: binary

注意

This option is ignored for SFTP transfer.

--ftp-reuse-connection [true|false]

Reuse connection in FTP. Default: true

--ssh-host-key-md=<TYPE>=<DIGEST>

Set checksum for SSH host public key. TYPE is hash type. The supported hash type is sha-1 or md5. DIGEST is hex digest. For example: sha-1=b030503d4de4539dc7885e6f0f5e256704edf4c3. This option can be used to validate server's public key when SFTP is used. If this option is not set, which is default, no validation takes place.

BitTorrent

--bt-detach-seed-only [true|false]

Exclude seed only downloads when counting concurrent active downloads (See -j option). This means that if -j3 is given and this option is turned on and 3 downloads are active and one of those enters seed mode, then it is excluded from active download count (thus it becomes 2), and the next download waiting in queue gets started. But be aware that seeding item is still recognized as active download in RPC method. Default: false

--bt-enable-hook-after-hash-check [true|false]

Allow hook command invocation after hash check (see -V option) in BitTorrent download. By default, when hash check succeeds, the command given by --on-bt-download-complete is executed. To disable this action, give false to this option. Default: true

--bt-enable-lpd [true|false]

Enable Local Peer Discovery. If a private flag is set in a torrent, aria2 doesn't use this feature for that download even if true is given. Default: false

--bt-exclude-tracker=<URI>[,...]

Comma separated list of BitTorrent tracker's announce URI to remove. You can use special value * which matches all URIs, thus removes all announce URIs. When specifying * in shell command-line, don't forget to escape or quote it. See also --bt-tracker option.

--bt-external-ip=<IPADDRESS>

Specify the external IP address to use in BitTorrent download and DHT. It may be sent to BitTorrent tracker. For DHT, this option should be set to report that local node is downloading a particular torrent. This is critical to use DHT in a private network. Although this function is named external, it can accept any kind of IP addresses.

--bt-force-encryption [true|false]

Requires BitTorrent message payload encryption with arc4. This is a shorthand of --bt-require-crypto --bt-min-crypto-level=arc4. This option does not change the option value of those options. If true is given, deny legacy BitTorrent handshake and only use Obfuscation handshake and always encrypt message payload. Default: false

--bt-hash-check-seed [true|false]

If true is given, after hash check using --check-integrity option and file is complete, continue to seed file. If you want to check file and download it only when it is damaged or incomplete, set this option to false. This option has effect only on BitTorrent download. Default: true

--bt-load-saved-metadata [true|false]

Before getting torrent metadata from DHT when downloading with magnet link, first try to read file saved by --bt-save-metadata option. If it is successful, then skip downloading metadata from DHT. Default: false

--bt-lpd-interface=<INTERFACE>

Use given interface for Local Peer Discovery. If this option is not specified, the default interface is chosen. You can specify interface name and IP address. Possible Values: interface, IP address

--bt-max-open-files=<NUM>

Specify maximum number of files to open in multi-file BitTorrent/Metalink download globally. Default: 100

--bt-max-peers=<NUM>

Specify the maximum number of peers per torrent. 0 means unlimited. See also --bt-request-peer-speed-limit option. Default: 55

--bt-metadata-only [true|false]

Download meta data only. The file(s) described in meta data will not be downloaded. This option has effect only when BitTorrent Magnet URI is used. See also --bt-save-metadata option. Default: false

--bt-min-crypto-level=plain|arc4

Set minimum level of encryption method. If several encryption methods are provided by a peer, aria2 chooses the lowest one which satisfies the given level. Default: plain

--bt-prioritize-piece=head[=<SIZE>],tail[=<SIZE>]

Try to download first and last pieces of each file first. This is useful for previewing files. The argument can contain 2 keywords: head and tail. To include both keywords, they must be separated by comma. These keywords can take one parameter, SIZE. For example, if head=<SIZE> is specified, pieces in the range of first SIZE bytes of each file get higher priority. tail=<SIZE> means the range of last SIZE bytes of each file. SIZE can include K or M (1K = 1024, 1M = 1024K). If SIZE is omitted, SIZE=1M is used.

--bt-remove-unselected-file [true|false]

Removes the unselected files when download is completed in BitTorrent. To select files, use --select-file option. If it is not used, all files are assumed to be selected. Please use this option with care because it will actually remove files from your disk. Default: false

--bt-require-crypto [true|false]

If true is given, aria2 doesn't accept and establish connection with legacy BitTorrent handshake(\19BitTorrent protocol). Thus aria2 always uses Obfuscation handshake. Default: false

--bt-request-peer-speed-limit=<SPEED>

If the whole download speed of every torrent is lower than SPEED, aria2 temporarily increases the number of peers to try for more download speed. Configuring this option with your preferred download speed can increase your download speed in some cases. You can append K or M (1K = 1024, 1M = 1024K). Default: 50K

--bt-save-metadata [true|false]

Save meta data as ".torrent" file. This option has effect only when BitTorrent Magnet URI is used. The file name is hex encoded info hash with suffix ".torrent". The directory to be saved is the same directory where download file is saved. If the same file already exists, meta data is not saved. See also --bt-metadata-only option. Default: false

--bt-seed-unverified [true|false]

Seed previously downloaded files without verifying piece hashes. Default: false

--bt-stop-timeout=<SEC>

Stop BitTorrent download if download speed is 0 in consecutive SEC seconds. If 0 is given, this feature is disabled. Default: 0

--bt-tracker=<URI>[,...]

Comma separated list of additional BitTorrent tracker's announce URI. These URIs are not affected by --bt-exclude-tracker option because they are added after URIs in --bt-exclude-tracker option are removed.

--bt-tracker-connect-timeout=<SEC>

Set the connect timeout in seconds to establish connection to tracker. After the connection is established, this option makes no effect and --bt-tracker-timeout option is used instead. Default: 60

--bt-tracker-interval=<SEC>

Set the interval in seconds between tracker requests. This completely overrides interval value and aria2 just uses this value and ignores the min interval and interval value in the response of tracker. If 0 is set, aria2 determines interval based on the response of tracker and the download progress. Default: 0

--bt-tracker-timeout=<SEC>

Set timeout in seconds. Default: 60

--dht-entry-point=<HOST>:<PORT>

Set host and port as an entry point to IPv4 DHT network.

--dht-entry-point6=<HOST>:<PORT>

Set host and port as an entry point to IPv6 DHT network.

--dht-file-path=<PATH>

Change the IPv4 DHT routing table file to PATH. Default: $HOME/.aria2/dht.dat if present, otherwise $XDG_CACHE_HOME/aria2/dht.dat.

--dht-file-path6=<PATH>

Change the IPv6 DHT routing table file to PATH. Default: $HOME/.aria2/dht6.dat if present, otherwise $XDG_CACHE_HOME/aria2/dht6.dat.

--dht-listen-addr6=<ADDR>

Specify address to bind socket for IPv6 DHT. It should be a global unicast IPv6 address of the host.

--dht-listen-port=<PORT>...

Set UDP listening port used by DHT(IPv4, IPv6) and UDP tracker. Multiple ports can be specified by using ,, for example: 6881,6885. You can also use - to specify a range: 6881-6999. , and - can be used together. Default: 6881-6999

注意

Make sure that the specified ports are open for incoming UDP traffic.

--dht-message-timeout=<SEC>

Set timeout in seconds. Default: 10

--enable-dht [true|false]

Enable IPv4 DHT functionality. It also enables UDP tracker support. If a private flag is set in a torrent, aria2 doesn't use DHT for that download even if true is given. Default: true

--enable-dht6 [true|false]

Enable IPv6 DHT functionality. If a private flag is set in a torrent, aria2 doesn't use DHT for that download even if true is given. Use --dht-listen-port option to specify port number to listen on. See also --dht-listen-addr6 option.

--enable-peer-exchange [true|false]

Enable Peer Exchange extension. If a private flag is set in a torrent, this feature is disabled for that download even if true is given. Default: true

--follow-torrent=true|false|mem

If true or mem is specified, when a file whose suffix is .torrent or content type is application/x-bittorrent is downloaded, aria2 parses it as a torrent file and downloads files mentioned in it. If mem is specified, a torrent file is not written to the disk, but is just kept in memory. If false is specified, the .torrent file is downloaded to the disk, but is not parsed as a torrent and its contents are not downloaded. Default: true

-O, --index-out=<INDEX>=<PATH>

Set file path for file with index=INDEX. You can find the file index using the --show-files option. PATH is a relative path to the path specified in --dir option. You can use this option multiple times. Using this option, you can specify the output file names of BitTorrent downloads.

--listen-port=<PORT>...

Set TCP port number for BitTorrent downloads. Multiple ports can be specified by using ,, for example: 6881,6885. You can also use - to specify a range: 6881-6999. , and - can be used together: 6881-6889,6999. Default: 6881-6999

注意

Make sure that the specified ports are open for incoming TCP traffic.

--max-overall-upload-limit=<SPEED>

Set max overall upload speed in bytes/sec. 0 means unrestricted. You can append K or M (1K = 1024, 1M = 1024K). To limit the upload speed per torrent, use --max-upload-limit option. Default: 0

-u, --max-upload-limit=<SPEED>

Set max upload speed per each torrent in bytes/sec. 0 means unrestricted. You can append K or M (1K = 1024, 1M = 1024K). To limit the overall upload speed, use --max-overall-upload-limit option. Default: 0

--peer-id-prefix=<PEER_ID_PREFIX>

Specify the prefix of peer ID. The peer ID in BitTorrent is 20 byte length. If more than 20 bytes are specified, only first 20 bytes are used. If less than 20 bytes are specified, random byte data are added to make its length 20 bytes.

Default: A2-$MAJOR-$MINOR-$PATCH-, $MAJOR, $MINOR and $PATCH are replaced by major, minor and patch version number respectively. For instance, aria2 version 1.18.8 has prefix ID A2-1-18-8-.

--peer-agent=<PEER_AGENT>

Specify the string used during the bitorrent extended handshake for the peer's client version.

Default: aria2/$MAJOR.$MINOR.$PATCH, $MAJOR, $MINOR and $PATCH are replaced by major, minor and patch version number respectively. For instance, aria2 version 1.18.8 has peer agent aria2/1.18.8.

--seed-ratio=<RATIO>

Specify share ratio. Seed completed torrents until share ratio reaches RATIO. You are strongly encouraged to specify equals or more than 1.0 here. Specify 0.0 if you intend to do seeding regardless of share ratio. If --seed-time option is specified along with this option, seeding ends when at least one of the conditions is satisfied. Default: 1.0

--seed-time=<MINUTES>

Specify seeding time in (fractional) minutes. Also see the --seed-ratio option.

注意

Specifying --seed-time=0 disables seeding after download completed.

-T, --torrent-file=<TORRENT_FILE>

The path to the ".torrent" file. You are not required to use this option because you can specify ".torrent" files without --torrent-file.

RPC

--enable-rpc [true|false]

Enable JSON-RPC/XML-RPC server. It is strongly recommended to set secret authorization token using --rpc-secret option. See also --rpc-listen-port option. Default: false

--pause [true|false]

Pause download after added. This option is effective only when --enable-rpc=true is given. Default: false

--pause-metadata [true|false]

Pause downloads created as a result of metadata download. There are 3 types of metadata downloads in aria2: (1) downloading .torrent file. (2) downloading torrent metadata using magnet link. (3) downloading metalink file. These metadata downloads will generate downloads using their metadata. This option pauses these subsequent downloads. This option is effective only when --enable-rpc=true is given. Default: false

--rpc-allow-origin-all [true|false]

Add Access-Control-Allow-Origin header field with value * to the RPC response. Default: false

--rpc-certificate=<FILE>

Use the certificate in FILE for RPC server. The certificate must be either in PKCS12 (.p12, .pfx) or in PEM format.

PKCS12 files must contain the certificate, a key and optionally a chain of additional certificates. Only PKCS12 files with a blank import password can be opened!

When using PEM, you have to specify the private key via --rpc-private-key as well. Use --rpc-secure option to enable encryption.

注意

WinTLS does not support PEM files at the moment. Users have to use PKCS12 files.

注意

AppleTLS users should use the KeyChain Access utility to first generate a self-signed SSL-Server certificate, e.g. using the wizard, and get the SHA-1 fingerprint from the Information dialog corresponding to that new certificate. To start aria2c with --rpc-secure use --rpc-certificate=<SHA-1>. Alternatively PKCS12 files are also supported. PEM files, however, are not supported.

--rpc-listen-all [true|false]

Listen incoming JSON-RPC/XML-RPC requests on all network interfaces. If false is given, listen only on local loopback interface. Default: false

--rpc-listen-port=<PORT>

Specify a port number for JSON-RPC/XML-RPC server to listen to. Possible Values: 1024 -65535 Default: 6800

--rpc-max-request-size=<SIZE>

Set max size of JSON-RPC/XML-RPC request. If aria2 detects the request is more than SIZE bytes, it drops connection. Default: 2M

--rpc-passwd=<PASSWD>

Set JSON-RPC/XML-RPC password.

Warning

--rpc-passwd option will be deprecated in the future release. Migrate to --rpc-secret option as soon as possible.

--rpc-private-key=<FILE>

Use the private key in FILE for RPC server. The private key must be decrypted and in PEM format. Use --rpc-secure option to enable encryption. See also --rpc-certificate option.

--rpc-save-upload-metadata [true|false]

Save the uploaded torrent or metalink meta data in the directory specified by --dir option. The file name consists of SHA-1 hash hex string of meta data plus extension. For torrent, the extension is '.torrent'. For metalink, it is '.meta4'. If false is given to this option, the downloads added by aria2.addTorrent() or aria2.addMetalink() will not be saved by --save-session option. Default: true

--rpc-secret=<TOKEN>

Set RPC secret authorization token. Read RPC authorization secret token to know how this option value is used.

--rpc-secure [true|false]

RPC transport will be encrypted by SSL/TLS. The RPC clients must use https scheme to access the server. For WebSocket client, use wss scheme. Use --rpc-certificate and --rpc-private-key options to specify the server certificate and private key.

--rpc-user=<USER>

Set JSON-RPC/XML-RPC user.

Warning

--rpc-user option will be deprecated in the future release. Migrate to --rpc-secret option as soon as possible.

高级

--allow-overwrite [true|false]

Restart download from scratch if the corresponding control file doesn't exist. See also --auto-file-renaming option. Default: false

--allow-piece-length-change [true|false]

If false is given, aria2 aborts download when a piece length is different from one in a control file. If true is given, you can proceed but some download progress will be lost. Default: false

--always-resume [true|false]

Always resume download. If true is given, aria2 always tries to resume download and if resume is not possible, aborts download. If false is given, when all given URIs do not support resume or aria2 encounters N URIs which does not support resume (N is the value specified using --max-resume-failure-tries option), aria2 downloads file from scratch. See --max-resume-failure-tries option. Default: true

--async-dns [true|false]

Enable asynchronous DNS. Default: true

--async-dns-server=<IPADDRESS>[,...]

Comma separated list of DNS server address used in asynchronous DNS resolver. Usually asynchronous DNS resolver reads DNS server addresses from /etc/resolv.conf. When this option is used, it uses DNS servers specified in this option instead of ones in /etc/resolv.conf. You can specify both IPv4 and IPv6 address. This option is useful when the system does not have /etc/resolv.conf and user does not have the permission to create it.

--auto-file-renaming [true|false]

Rename file name if the same file already exists. This option works only in HTTP(S)/FTP download. The new file name has a dot and a number(1..9999) appended after the name, but before the file extension, if any. Default: true

--auto-save-interval=<SEC>

Save a control file(*.aria2) every SEC seconds. If 0 is given, a control file is not saved during download. aria2 saves a control file when it stops regardless of the value. The possible values are between 0 to 600. Default: 60

--conditional-get [true|false]

Download file only when the local file is older than remote file. This function only works with HTTP(S) downloads only. It does not work if file size is specified in Metalink. It also ignores Content-Disposition header. If a control file exists, this option will be ignored. This function uses If-Modified-Since header to get only newer file conditionally. When getting modification time of local file, it uses user supplied file name (see --out option) or file name part in URI if --out is not specified. To overwrite existing file, --allow-overwrite is required. Default: false

--conf-path=<PATH>

Change the configuration file path to PATH. Default: $HOME/.aria2/aria2.conf if present, otherwise $XDG_CONFIG_HOME/aria2/aria2.conf.

--console-log-level=<LEVEL>

Set log level to output to console. LEVEL is either debug, info, notice, warn or error. Default: notice

--content-disposition-default-utf8 [true|false]

Handle quoted string in Content-Disposition header as UTF-8 instead of ISO-8859-1, for example, the filename parameter, but not the extended version filename*. Default: false

-D, --daemon [true|false]

Run as daemon. The current working directory will be changed to / and standard input, standard output and standard error will be redirected to /dev/null. Default: false

--deferred-input [true|false]

If true is given, aria2 does not read all URIs and options from file specified by --input-file option at startup, but it reads one by one when it needs later. This may reduce memory usage if input file contains a lot of URIs to download. If false is given, aria2 reads all URIs and options at startup. Default: false

Warning

--deferred-input option will be disabled when --save-session is used together.

--disable-ipv6 [true|false]

Disable IPv6. This is useful if you have to use broken DNS and want to avoid terribly slow AAAA record lookup. Default: false

--disk-cache=<SIZE>

Enable disk cache. If SIZE is 0, the disk cache is disabled. This feature caches the downloaded data in memory, which grows to at most SIZE bytes. The cache storage is created for aria2 instance and shared by all downloads. The one advantage of the disk cache is reduce the disk I/O because the data are written in larger unit and it is reordered by the offset of the file. If hash checking is involved and the data are cached in memory, we don't need to read them from the disk. SIZE can include K or M (1K = 1024, 1M = 1024K). Default: 16M

--download-result=<OPT>

This option changes the way Download Results is formatted. If OPT is default, print GID, status, average download speed and path/URI. If multiple files are involved, path/URI of first requested file is printed and remaining ones are omitted. If OPT is full, print GID, status, average download speed, percentage of progress and path/URI. The percentage of progress and path/URI are printed for each requested file in each row. If OPT is hide, Download Results is hidden. Default: default

--dscp=<DSCP>

Set DSCP value in outgoing IP packets of BitTorrent traffic for QoS. This parameter sets only DSCP bits in TOS field of IP packets, not the whole field. If you take values from /usr/include/netinet/ip.h divide them by 4 (otherwise values would be incorrect, e.g. your CS1 class would turn into CS4). If you take commonly used values from RFC, network vendors' documentation, Wikipedia or any other source, use them as they are.

--rlimit-nofile=<NUM>

Set the soft limit of open file descriptors. This open will only have effect when:

  1. The system supports it (posix)
  2. The limit does not exceed the hard limit.
  3. The specified limit is larger than the current soft limit.

This is equivalent to setting nofile via ulimit, except that it will never decrease the limit.

This option is only available on systems supporting the rlimit API.

--enable-color [true|false]

Enable color output for a terminal. Default: true

--enable-mmap [true|false]

Map files into memory. This option may not work if the file space is not pre-allocated. See --file-allocation.

Default: false

--event-poll=<POLL>

Specify the method for polling events. The possible values are epoll, kqueue, port, poll and select. For each epoll, kqueue, port and poll, it is available if system supports it. epoll is available on recent Linux. kqueue is available on various *BSD systems including Mac OS X. port is available on Open Solaris. The default value may vary depending on the system you use.

--file-allocation=<METHOD>

Specify file allocation method. none doesn't pre-allocate file space. prealloc pre-allocates file space before download begins. This may take some time depending on the size of the file. If you are using newer file systems such as ext4 (with extents support), btrfs, xfs or NTFS(MinGW build only), falloc is your best choice. It allocates large(few GiB) files almost instantly. Don't use falloc with legacy file systems such as ext3 and FAT32 because it takes almost same time as prealloc and it blocks aria2 entirely until allocation finishes. falloc may not be available if your system doesn't have posix_fallocate(3) function. trunc uses ftruncate(2) system call or platform-specific counterpart to truncate a file to a specified length.

Possible Values: none, prealloc, trunc, falloc Default: prealloc

Warning

Using trunc seemingly allocates disk space very quickly, but what it actually does is that it sets file length metadata in file system, and does not allocate disk space at all. This means that it does not help avoiding fragmentation.

注意

In multi file torrent downloads, the files adjacent forward to the specified files are also allocated if they share the same piece.

--force-save [true|false]

Save download with --save-session option even if the download is completed or removed. This option also saves control file in that situations. This may be useful to save BitTorrent seeding which is recognized as completed state. Default: false

--save-not-found [true|false]

Save download with --save-session option even if the file was not found on the server. This option also saves control file in that situations. Default: true

--gid=<GID>

Set GID manually. aria2 identifies each download by the ID called GID. The GID must be hex string of 16 characters, thus [0-9a-fA-F] are allowed and leading zeros must not be stripped. The GID all 0 is reserved and must not be used. The GID must be unique, otherwise error is reported and the download is not added. This option is useful when restoring the sessions saved using --save-session option. If this option is not used, new GID is generated by aria2.

--hash-check-only [true|false]

If true is given, after hash check using --check-integrity option, abort download whether or not download is complete. Default: false

--human-readable [true|false]

Print sizes and speed in human readable format (e.g., 1.2Ki, 3.4Mi) in the console readout. Default: true

--interface=<INTERFACE>

Bind sockets to given interface. You can specify interface name, IP address and host name. Possible Values: interface, IP address, host name

注意

If an interface has multiple addresses, it is highly recommended to specify IP address explicitly. See also --disable-ipv6. If your system doesn't have getifaddrs(3), this option doesn't accept interface name.

--keep-unfinished-download-result [true|false]

Keep unfinished download results even if doing so exceeds --max-download-result. This is useful if all unfinished downloads must be saved in session file (see --save-session option). Please keep in mind that there is no upper bound to the number of unfinished download result to keep. If that is undesirable, turn this option off. Default: true

--max-download-result=<NUM>

Set maximum number of download result kept in memory. The download results are completed/error/removed downloads. The download results are stored in FIFO queue and it can store at most NUM download results. When queue is full and new download result is created, oldest download result is removed from the front of the queue and new one is pushed to the back. Setting big number in this option may result high memory consumption after thousands of downloads. Specifying 0 means no download result is kept. Note that unfinished downloads are kept in memory regardless of this option value. See --keep-unfinished-download-result option. Default: 1000

--max-mmap-limit=<SIZE>

Set the maximum file size to enable mmap (see --enable-mmap option). The file size is determined by the sum of all files contained in one download. For example, if a download contains 5 files, then file size is the total size of those files. If file size is strictly greater than the size specified in this option, mmap will be disabled. Default: 9223372036854775807

--max-resume-failure-tries=<N>

When used with --always-resume=false, aria2 downloads file from scratch when aria2 detects N number of URIs that does not support resume. If N is 0, aria2 downloads file from scratch when all given URIs do not support resume. See --always-resume option. Default: 0

--min-tls-version=<VERSION>

Specify minimum SSL/TLS version to enable. Possible Values: TLSv1.1, TLSv1.2, TLSv1.3 Default: TLSv1.2

--multiple-interface=<INTERFACES>

Comma separated list of interfaces to bind sockets to. Requests will be splited among the interfaces to achieve link aggregation. You can specify interface name, IP address and hostname. If --interface is used, this option will be ignored. Possible Values: interface, IP address, hostname

--log-level=<LEVEL>

Set log level to output. LEVEL is either debug, info, notice, warn or error. Default: debug

--on-bt-download-complete=<COMMAND>

For BitTorrent, a command specified in --on-download-complete is called after download completed and seeding is over. On the other hand, this option set the command to be executed after download completed but before seeding. See Event Hook for more details about COMMAND. Possible Values: /path/to/command

--on-download-complete=<COMMAND>

Set the command to be executed after download completed. See Event Hook for more details about COMMAND. See also --on-download-stop option. Possible Values: /path/to/command

--on-download-error=<COMMAND>

Set the command to be executed after download aborted due to error. See Event Hook for more details about COMMAND. See also --on-download-stop option. Possible Values: /path/to/command

--on-download-pause=<COMMAND>

Set the command to be executed after download was paused. See Event Hook for more details about COMMAND. Possible Values: /path/to/command

--on-download-start=<COMMAND>

Set the command to be executed after download got started. See Event Hook for more details about COMMAND. Possible Values: /path/to/command

--on-download-stop=<COMMAND>

Set the command to be executed after download stopped. You can override the command to be executed for particular download result using --on-download-complete and --on-download-error. If they are specified, command specified in this option is not executed. See Event Hook for more details about COMMAND. Possible Values: /path/to/command

--optimize-concurrent-downloads [true|false|<A>:<B>]

Optimizes the number of concurrent downloads according to the bandwidth available. aria2 uses the download speed observed in the previous downloads to adapt the number of downloads launched in parallel according to the rule N = A + B Log10(speed in Mbps). The coefficients A and B can be customized in the option arguments with A and B separated by a colon. The default values (A=5, B=25) lead to using typically 5 parallel downloads on 1Mbps networks and above 50 on 100Mbps networks. The number of parallel downloads remains constrained under the maximum defined by the --max-concurrent-downloads parameter. Default: false

--piece-length=<LENGTH>

Set a piece length for HTTP/FTP downloads. This is the boundary when aria2 splits a file. All splits occur at multiple of this length. This option will be ignored in BitTorrent downloads. It will be also ignored if Metalink file contains piece hashes. Default: 1M

注意

The possible use case of --piece-length option is change the request range in one HTTP pipelined request. To enable HTTP pipelining use --enable-http-pipelining.

--show-console-readout [true|false]

Show console readout. Default: true

--stderr [true|false]

Redirect all console output that would be otherwise printed in stdout to stderr. Default: false

--summary-interval=<SEC>

Set interval in seconds to output download progress summary. Setting 0 suppresses the output. Default: 60

-Z, --force-sequential [true|false]

Fetch URIs in the command-line sequentially and download each URI in a separate session, like the usual command-line download utilities. Default: false

--max-overall-download-limit=<SPEED>

Set max overall download speed in bytes/sec. 0 means unrestricted. You can append K or M (1K = 1024, 1M = 1024K). To limit the download speed per download, use --max-download-limit option. Default: 0

--max-download-limit=<SPEED>

Set max download speed per each download in bytes/sec. 0 means unrestricted. You can append K or M (1K = 1024, 1M = 1024K). To limit the overall download speed, use --max-overall-download-limit option. Default: 0

--no-conf [true|false]

Disable loading aria2.conf file.

--no-file-allocation-limit=<SIZE>

No file allocation is made for files whose size is smaller than SIZE. You can append K or M (1K = 1024, 1M = 1024K). Default: 5M

-P, --parameterized-uri [true|false]

Enable parameterized URI support. You can specify set of parts: http://{sv1,sv2,sv3}/foo.iso. Also you can specify numeric sequences with step counter: http://host/image[000-100:2].img. A step counter can be omitted. If all URIs do not point to the same file, such as the second example above, -Z option is required. Default: false

-q, --quiet [true|false]

Make aria2 quiet (no console output). Default: false

--realtime-chunk-checksum [true|false]

Validate chunk of data by calculating checksum while downloading a file if chunk checksums are provided. Default: true

--remove-control-file [true|false]

Remove control file before download. Using with --allow-overwrite=true, download always starts from scratch. This will be useful for users behind proxy server which disables resume.

--save-session=<FILE>

Save error/unfinished downloads to FILE on exit. You can pass this output file to aria2c with --input-file option on restart. If you like the output to be gzipped append a .gz extension to the file name. Please note that downloads added by aria2.addTorrent() and aria2.addMetalink() RPC method and whose meta data could not be saved as a file are not saved. Downloads removed using aria2.remove() and aria2.forceRemove() will not be saved. GID is also saved with gid, but there are some restrictions, see below.

注意

Normally, GID of the download itself is saved. But some downloads use meta data (e.g., BitTorrent and Metalink). In this case, there are some restrictions.

magnet URI, and followed by torrent download
GID of BitTorrent meta data download is saved.
URI to torrent file, and followed by torrent download
GID of torrent file download is saved.
URI to metalink file, and followed by file downloads described in metalink file
GID of metalink file download is saved.
local torrent file
GID of torrent download is saved.
local metalink file
Any meaningful GID is not saved.
--save-session-interval=<SEC>

Save error/unfinished downloads to a file specified by --save-session option every SEC seconds. If 0 is given, file will be saved only when aria2 exits. Default: 0

--socket-recv-buffer-size=<SIZE>

Set the maximum socket receive buffer in bytes. Specifying 0 will disable this option. This value will be set to socket file descriptor using SO_RCVBUF socket option with setsockopt() call. Default: 0

--stop=<SEC>

Stop application after SEC seconds has passed. If 0 is given, this feature is disabled. Default: 0

--stop-with-process=<PID>

Stop application when process PID is not running. This is useful if aria2 process is forked from a parent process. The parent process can fork aria2 with its own pid and when parent process exits for some reason, aria2 can detect it and shutdown itself.

--truncate-console-readout [true|false]

Truncate console readout to fit in a single line. Default: true

-v, --version

Print the version number, copyright and the configuration information and exit.

配置说明

Optional arguments

The options that have its argument surrounded by square brackets([]) take an optional argument. Usually omitting the argument is evaluated to true. If you use short form of these options(such as -V) and give an argument, then the option name and its argument should be concatenated(e.g. -Vfalse). If any spaces are inserted between the option name and the argument, the argument will be treated as URI and usually this is not what you expect.

Units (K and M)

Some options takes K and M to conveniently represent 1024 and 1048576 respectively. aria2 detects these characters in case-insensitive way. In other words, k and m can be used as well as K and M respectively.

恢复下载

Usually, you can resume transfer by just issuing same command (aria2c URI) if the previous transfer is made by aria2.

If the previous transfer is made by a browser or wget like sequential download manager, then use --continue option to continue the transfer.

事件钩子

aria2 provides options to specify arbitrary command after specific event occurred. Currently following options are available: --on-bt-download-complete, --on-download-pause, --on-download-complete. --on-download-start, --on-download-error, --on-download-stop.

aria2 passes 3 arguments to specified command when it is executed. These arguments are: GID, the number of files and file path. For HTTP, FTP, and SFTP downloads, usually the number of files is 1. BitTorrent download can contain multiple files. If number of files is more than one, file path is first one. In other words, this is the value of path key of first struct whose selected key is true in the response of aria2.getFiles() RPC method. If you want to get all file paths, consider to use JSON-RPC/XML-RPC. Please note that file path may change during download in HTTP because of redirection or Content-Disposition header.

Let's see an example of how arguments are passed to command:

$ cat hook.sh
                #!/bin/sh
                echo "Called with [$1] [$2] [$3]"
                $ aria2c --on-download-complete hook.sh http://example.org/file.iso
                Called with [1] [1] [/path/to/file.iso]