aria2c http://host/file.zip
aria2c - The ultra fast download utility
aria2c [OPTIONS] URL …
aria2c [OPTIONS] -T TORRENT_FILE [URL …]
aria2c [OPTIONS] -M METALINK_FILE
aria2 is a utility for downloading files. The supported protocols are HTTP(S), FTP, BitTorrent, and Metalink. It has a powerful segmented downloading ability, downloading a file from multiple sources and multiple protocols and utilizing your download bandwidth to the maximum. It supports downloading a file from HTTP(S)/FTP and BitTorrent at the same time, while the data downloaded from HTTP(S)/FTP is uploaded to the BitTorrent swarm. Using Metalink's chunk checksums, aria2 automatically validates chunks of data while downloading a file like BitTorrent.
The directory to store the downloaded file.
The file name of the downloaded file.
In Metalink, BitTorrent download you cannot specify file name. The file name specified here is only used when the URLs fed to aria2 is done by command line without -i option, like this: aria2c -o myfile.zip http://mirror1/file.zip http://mirror2/file.zip
The file name of the log file. If - is specified, log is written to stdout.
Run as daemon.
Download a file using N connections. N must be between 1 and 5. This option affects all URLs. Thus, aria2 connects to each URL with N connections. Default: 1
Set the seconds to wait to retry after an error has occured. Specify a value between 0 and 60. Default: 5
Set timeout in seconds. Default: 60
Set number of tries. 0 means unlimited. Default: 5
Use HTTP proxy server. This affects all URLs.
Set HTTP user. This affects all URLs.
Set HTTP password. This affects all URLs.
Set HTTP proxy user. This affects all URLs.
Set HTTP proxy password. This affects all URLs.
Set the method to use in proxy request. METHOD is either get or tunnel. Default: tunnel
Set HTTP authentication scheme. Currently, basic is the only supported scheme. Default: basic
Set Referer. This affects all URLs.
Set FTP user. This affects all URLs. Default: anonymous
Set FTP password. This affects all URLs. Default: ARIA2USER@
Set FTP transfer type. TYPE is either binary or ascii. Default: binary
Use passive mode in FTP.
Use HTTP proxy in FTP. METHOD is either get or tunnel. Default: tunnel
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
Set max download speed in bytes per sec. 0 means unrestricted. You can append K or M(1K = 1024, 1M = 1024K). Default: 0
Specify file allocation method. METHOD is either none or prealloc. 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. Default: prealloc
In multi file torrent, the files adjacent forward to the specified files are also allocated if they share a same piece.
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
Enable directI/O, which lowers cpu usage while allocating/checking files. Turn off if you encounter any error. Default: false
If false is given, aria2 doesn't download a file which already exists but the corresponding .aria2 file doesn't exist. In HTTP(S)/FTP download, if —auto-file-renaming=true then, file name will be renamed. See —auto-file-renaming for details. Default: 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
Fetch URIs in the command-line sequentially and download each URI in a separate session, like the usual command-line download utilities. Default: 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. Default: true
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
Enable HTTP/1.1 persistent connection. Default: false
Enable HTTP/1.1 pipelining. Default: false
Check file integrity by validating piece hash. This option only affects in BitTorrent downloads and Metalink downloads with chunk checksums. Use this option to re-download a damaged portion of a file. Default: false
Validate chunk of data by calculating checkusm while download a file if chunk checksums are provided. Currently Metalink is the only way to to provide chunk checksums. Default: true
Continue downloading a partially downloaded file. Use this option to resume a download started by a web browser or another program which downloads files sequentially from the beginning. Currently this option is only applicable to HTTP(S)/FTP downloads.
Set user agent for HTTP(S) downloads.
Disables netrc support. netrc support is enabled by default.
Downloads URIs found in FILE. You can specify multiple URIs for a single entity: separate URIs on a single line using the TAB character. Reads input from stdin when - is specified.
Set maximum number of concurrent downloads. It should be used with the -i option. Default: 5
Load cookies from FILE. The format of FILE is the same used by Netscape and Mozilla.
Disable loading aria2.conf file.
Change the configuration file path to PATH. Default: $HOME/.aria2/aria2.conf
Stop application after SEC seconds has passed. If 0 is given, this feature is disabled. Default: 0
Print file listing of .torrent or .metalink file and exit. In case of .torrent file, additional information (infohash, piece length, etc) is also printed.
Set file to download by specifing its index. You can find the file index using the —show-files option. Multiple indexes can be specified by using ",", for example: 3,6. You can also use "-" to specify a range: 1-5. "," and "-" can be used together: 1-5,8,9. When used with the -M option, index may vary depending on the query (see —metalink-* options).
In multi file torrent, the adjacent files specified by this option may also be downloaded. This is by design, not a bug. A single piece may include several files or part of files, and aria2 writes the piece to the appropriate files.
The path to the .torrent file.
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 action mentioned above is not taken. Default: true
Directly read from and write to each file mentioned in .torrent file. Use this option if lots of files are listed in .torrent file and aria2 complains it cannot open files anymore. Default: true
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
Make sure that the specified ports are open for incoming TCP traffic.
Set max upload speed in bytes per sec. 0 means unrestricted. You can append K or M(1K = 1024, 1M = 1024K). Default: 0
Specify seeding time in minutes. Also see the —seed-ratio option.
Specify share ratio. Seed completed torrents until share ratio reaches] RATIO. I strongly encourages you 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
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, the random alphabet characters are added to make it's length 20 bytes. Default: -aria2-
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
Enable DHT functionality. If a private flag is set in a torrent, aria2 doesn't use DHT for that download even if true is given. Default: false
Set UDP listening port for DHT. 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
Set host and port as an entry point to DHT network.
Set minimum level of encryption method. If several encryption methods are provided by a peer, aria2 chooses a lowest one which satisfies the given level. Default: plain
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
The file path to .metalink file.
The number of servers to connect to simultaneously. Some metalinks regulates the number of servers to connect. aria2 respects them. Default: 5
The version of the file to download.
The language of the file to download.
The operating system of the file to download.
The location of the preferred server. A comma-deliminated list of locations is acceptable, for example, JP,US.
Specify preferred protocol. The possible values are http, https, ftp and none. Specifiy none to disable this feature. Default: none
If true or mem is specified, when a file whose suffix is ".metaink" or content type is "application/metalink+xml" is downloaded, aria2 parses it as a metalink file and downloads files mentioned in it. If mem is specified, a metalink file is not written to the disk, but is just kept in memory. If false is specified, the action mentioned above is not taken. Default: true
If true is given and several protocols are available for a mirror in a metalink file, aria2 uses one of them. Use —metalink-preferred-protocol option to specify the preference of protocol. Default: true
Print the version number, copyright and the configuration information and exit.
Print usage and exit. The help messages are classified in several categories. For example, type "—help=http" for detailed explanation for the options related to HTTP. If no matching category is found, search option name using a given word in forward match and print the result. Available Values: basic, advanced, http, ftp, metalink, bittorrent, all Default: basic
You can specify multiple URLs. Unless you specify -Z option, all URLs must point to the same file or downloading will fail. You can specify both torrent file with -T option and URLs. By doing this, download a file from both torrent swarm and HTTP(S)/FTP server at the same time, while the data from HTTP(S)/FTP are uploaded to the torrent swarm. Note that only single file torrent can be integrated with HTTP(S)/FTP.
Make sure that URL is quoted with single(') or double(") quotation if it contains "&" or any characters that have special meaning in shell.
aria2c http://host/file.zip
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Note
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To pause a download, press Ctrl-C. You can resume the transfer by run aria2c with the same argument at the same directory. You can change URLs as long as they are pointing to the same file. |
aria2c -s2 http://host/file.zip
aria2c http://host/file.zip http://mirror/file.zip
aria2c http://host1/file.zip ftp://host2/file.zip
aria2c -ifiles.txt -j5
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-j option specifies the number of concurrent downloads. |
aria2c --follow-metalink=mem http://host/file.metalink
aria2c -p -t10 --lowest-speed-limit=4000 -Mtest.metalink
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Note
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To pause a download, press Ctrl-C. You can resume the transfer by run aria2c with the same argument at the same directory. |
aria2c -Mtest.metalink --select-file=1-4,8
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The index is printed to the console using -S option. |
aria2c -Mtest.metalink --metalink-location=JP,US --metalink-version=1.1 --metalink-language=en-US
aria2c --follow-bittorrent=mem http://host/file.torrent
aria2c --max-upload-limit=40K -Tfile.torrent
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—max-upload-limit specifies the max of upload rate. |
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To pause a download, press Ctrl-C. You can resume the transfer by run aria2c with the same argument at the same directory. |
aria2c -Ttest.torrent http://host1/file ftp://host2/file
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Downloading multi file torrent with HTTP/FTP is not supported. |
aria2c -Ttest.torrent --select-file=1-4,8
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The index is printed to the console using -S option. |
aria2c -Ttest.torrent --listen-port=7000-7001,8000
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Since aria2 doesn't configure firewall or router for port forwarding, it's up to you to do it manually. |
aria2c -Ttest.torrent --seed-time=120 --seed-ratio=1.0
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In the above example, the program exists when the 120 minutes has elapsed since download completed or seed ratio reaches 1.0. |
aria2c -Ttest.torrent --max-upload-limit=100K
aria2c -Ttest.torrent --enable-dht --dht-listen-port=6881
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DHT uses udp port. Since aria2 doesn't configure firewall or router for port forwarding, it's up to you to do it manually. |
aria2c --load-cookies=cookies.txt http://host/file.zip
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You can use Firefox/Mozilla's cookie file without modification. |
aria2c -c -s2 http://host/partiallydownloadedfile.zip
aria2c -Mtest.metalink --max-download-limit=100K
aria2c -Mtest.metalink --check-integrity=true
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This option is only available used with BitTorrent or metalink with chunk checksums. |
aria2c -Mtest.metalink --lowest-speed-limit=10K
You can specify set of parts:
aria2c -P http://{host1,host2,host3}/file.iso
You can specify numeric sequence:
aria2c -Z -P http://host/image[000-100].png
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-Z option is required if the all URIs don't point to the same file, such as the above example. |
You can specify step counter:
aria2c -Z -P http://host/image[A-Z:2].png
Encrypt whole payload using ARC4:
aria2c -Tfile.torrent --bt-min-crypto-level=arc4 --bt-require-crypto=true
Usually, you can resume transfer by just issuing same command(aria2c URL) if the previous transfer is made by aria2.
If the previous transfer is made by a browser or wget like sequencial download manager, then use -c option to continue the transfer(aria2c -c URL).
aria2 uses a control file to keep track the progress of download. A control file is placed at the same directory of the dowloading file and its filename is the filename of downloading file with ".aria2" appended. For example, if you are downloading file.zip, then the control file should be file.zip.aria2. (There is a exception for this naming convention. If you are downloading a multi torrent, its control file is the "top directory" name of the torrent with ".aria2" appended. The "top directory" name is a value of "name" key in "info" directory in a torrent file.)
Usually a control file is deleted once download completed. If aria2 decides that download cannot be resumed(for example, when downloading a file from a HTTP server which doesn't support resume), a control file is not created.
Normally if you lose a control file, you cannot resume download. But if you have a torrent or metalink with chunk checksums for the file, you can resume the download without a control file by giving —check-integrity=true option to aria2c in command-line.
You can seed downloaded file using —check-integrity=true option.
aria2c --check-integrity=true -T file.torrent
User configuration file. It must be placed under $HOME/.aria2 and must be named as aria2.conf. In each line, there is 1 parameter whose syntax is name=value pair, where name is the long command-line option name without — prefix. The lines beginning # are treated as comments.
# sample configuration file for aria2c file-allocation=prealloc listen-port=60000 seed-ratio=1.0 max-upload-limit=100K ftp-pasv=true
The routing table of DHT is saved to the path $HOME/.aria2/dht.dat.
Project web site: http://aria2.sourceforge.net/
metalink: http://www.metalinker.org/
Report bugs to Tatsuhiro Tsujikawa <t-tujikawa@users.sourceforge.net>
Tatsuhiro Tsujikawa <t-tujikawa@users.sourceforge.net>
Copyright © 2006, 2008 Tatsuhiro Tsujikawa
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
In addition, as a special exception, the copyright holders give permission to link the code of portions of this program with the OpenSSL library under certain conditions as described in each individual source file, and distribute linked combinations including the two. You must obey the GNU General Public License in all respects for all of the code used other than OpenSSL. If you modify file(s) with this exception, you may extend this exception to your version of the file(s), but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. If you delete this exception statement from all source files in the program, then also delete it here.