linux axel 命令介绍
axel 是一个轻量级的命令行下载加速器，旨在提高从 HTTP、HTTPS 和 FTP 服务器下载文件的速度。它通过将文件分割成多个部分并同时下载这些部分来加速下载过程，从而显著提高下载效率。
axel 是Linux下一个不错的HTTP/ftp高速下载工具。支持多线程下载、断点续传，且可以从多个地址或者从一个地址的多个连接来下载同一个文件。适合网速不给力时多线程下载提高下载速度。比如在国内VPS或服务器上下载lnmp一键安装包用Axel就比wget快。
一：安装部署
root@meng:~# axel
Command 'axel' not found, but can be installed with:
snap install axel # version 2.17.14, or
apt install axel # version 2.17.11-1
See 'snap info axel' for additional versions.
root@meng:~# which axel
root@meng:~# apt install axel
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following NEW packages will be installed:
axel
0 upgraded, 1 newly installed, 0 to remove and 214 not upgraded.
Need to get 58.7 kB of archives.
After this operation, 204 kB of additional disk space will be used.
Get:1 http://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy/universe amd64 axel amd64 2.17.11-1 [58.7 kB]
Fetched 58.7 kB in 2s (38.3 kB/s)
Selecting previously unselected package axel.
(Reading database ... 75036 files and directories currently installed.)
Preparing to unpack .../axel_2.17.11-1_amd64.deb ...
Unpacking axel (2.17.11-1) ...
Setting up axel (2.17.11-1) ...
Processing triggers for man-db (2.10.2-1) ...
Scanning processes...
Scanning linux images...
Running kernel seems to be up-to-date.
No services need to be restarted.
No containers need to be restarted.
No user sessions are running outdated binaries.
No VM guests are running outdated hypervisor (qemu) binaries on this host.
二：命令介绍
root@meng:~# axel
Axel 2.17.11 (linux-gnu)
Usage: axel [options] url1 [url2] [url...]
--max-speed=x -s x Specify maximum speed (bytes per second)
--num-connections=x -n x Specify maximum number of connections
--max-redirect=x Specify maximum number of redirections
--output=f -o f Specify local output file
--search[=n] -S[n] Search for mirrors and download from n servers
--ipv4 -4 Use the IPv4 protocol
--ipv6 -6 Use the IPv6 protocol
--header=x -H x Add HTTP header string
--user-agent=x -U x Set user agent
--no-proxy -N Just don't use any proxy server
--insecure -k Don't verify the SSL certificate
--no-clobber -c Skip download if file already exists
--quiet -q Leave stdout alone
--verbose -v More status information
--alternate -a Alternate progress indicator
--percentage -p Print simple percentages instead of progress bar (0-100)
--help -h This information
--timeout=x -T x Set I/O and connection timeout
--version -V Version information
Visit https://github.com/axel-download-accelerator/axel/issues to report bugs
三：案例
root@meng:~# axel -n 3 https://umimeta-sit.bj.bcebos.com/ai/avatar/2d/0c86af62-fd21-4a77-be08-a53c49bd8c8f.zip
Initializing download: https://umimeta-sit.bj.bcebos.com/ai/avatar/2d/0c86af62-fd21-4a77-be08-a53c49bd8c8f.zip
File size: 19.639 Megabyte(s) (20593006 bytes)
Opening output file 0c86af62-fd21-4a77-be08-a53c49bd8c8f.zip
Starting download
Connection 0 finished
Connection 1 finished
[100%] [..............................................................................................................................] [ 2.5MB/s] [00:00]
Downloaded 19.639 Megabyte(s) in 7 second(s). (2536.45 KB/s)
