在linux环境下，用wget下载大文件，实在是件痛苦的事情，下载速度慢。这非常的不科学，于是找到了axel这个工具，可以实现在linux下多线程下载。并且可以实现断点续传。

Axel项目网站 https://wilmer.gaa.st/main.php/axel.html

安装

wget -c https://wilmer.gaa.st/downloads/axel-1.0b.tar.gz
tar zxvf axel-1.0b.tar.gz
cd axel-1.0b/
./configure
make
make instal

或者

apt-get install axel

参数
-n 指定线程数
-o 指定另存为目录
-s 指定每秒的最大比特数
-q 静默模式

测试

比如从UCSC上下载 938M 的参考基因组序列gz格式文件

axel -n 8 http://hgdownload.cse.ucsc.edu/goldenPath/hg38/bigZips/hg38.fa.gz

Initializing download: http://hgdownload.cse.ucsc.edu/goldenPath/hg38/bigZips/hg38.fa.gz
File size: 983659424 bytes
Opening output file hg38.fa.gz
Starting download

[  0%]  .......... .......... ..........  [  41.3KB/s]
[  0%]  .......... .......... ..........  [ 179.5KB/s]
[  0%]  .......... .......... ..........  [ 423.4KB/s]
[  0%]  .......... .......... ..........  [ 583.9KB/s]
[  0%]  .......... .......... ..........  [ 772.0KB/s]
[  0%]  .......... .......... ..........  [ 801.8KB/s]
[  0%]  .......... .......... ..........  [ 802.1KB/s]
[  0%]  .......... .......... ..........  [ 813.1KB/s]
[  1%]  .......... .......... ..........  [ 843.5KB/s]
[ 99%]  .......... .......... ..........  [ 666.7KB/s]
[ 99%]  .......... ......
Connection 7 finished
        ,,,,,,,,,, ,,,,,,,,,, ,,,,,,....  [ 666.6KB/s]
[ 99%]  .......... .......... ..........  [ 666.7KB/s]
[ 99%]  .......... .......
Connection 2 finished
        ,,,,,,,,,, ,,,,,,,,,, ,,,,,,,...  [ 666.5KB/s]
[ 99%]  .......... .......... ..........  [ 663.1KB/s]
[ 99%]  .......... .......... ..........  [ 662.8KB/s]
[100%]  ....
Connection 0 finished

Downloaded 938.1 megabytes in 24:09 seconds. (662.81 KB/s)