【充电】linux学习（四）——wget命令-嘻哈小屋

wget命令是对互联网资源进行下载，最近想弄个自助下载并自动上传备份的脚本，由于wget命令不太了解，今天来充充电。

比如运行wget ，你会发现

–2017-04-05 06:18:11– http://xihajun.com/
Resolving xihajun.com (xihajun.com)… 27.221.28.174, 121.29.54.21, 14.204.144.173, …
Connecting to xihajun.com (xihajun.com)|27.221.28.174|:80… connected.
HTTP request sent, awaiting response… 200 OK
Length: 125556 (123K) [text/html]
Saving to: `index.html’

100%[=====================================>] 125,556 168K/s in 0.7s

2017-04-05 06:18:15 (168 KB/s) – `index.html’ saved [125556/125556]

下载了index.html文件，如果想要将将文件重命名（比如命名为xiha.html）可以使用-O参数，具体如下：

wget -c xihajun.com -O xiha.html

–2017-04-05 06:19:09– http://xihajun.com/
Resolving xihajun.com (xihajun.com)… 27.221.28.174, 121.29.54.21, 14.204.144.173, …
Connecting to xihajun.com (xihajun.com)|27.221.28.174|:80… connected.
HTTP request sent, awaiting response… 200 OK
Length: 125556 (123K) [text/html]
Saving to: `xiha.html’

100%[=====================================>] 125,556 163K/s in 0.8s

2017-04-05 06:19:11 (163 KB/s) – `xiha.html’ saved [125556/125556]

下载比较大的文件或者网速慢的时候会遇到中断连接的情况，这时候-c参数，就是断电续传功能是一个不错的选择

wget -c http://xihajun.com

当然还可以设定超时次数用-t（times来指定）

还有比较强悍的批量下载功能，可以将想要下载的链接存到一个文件中，之后使用参数-i批量对文件里每行给出的链接进行下载，功能还是很强悍的
比如我把链接文件存为a，a中内容如下（发现其中开头有空格的可以正常下载，而其余文字(带引号都)不行，不加http://也不能正常下载）

test
test xihajun.com
http://xihajun.com
http://xihajun.com test
  http://xihajun.com
  xihajun.com
xihajun.com

结果如下：

a: Invalid URL test: Scheme missing
a: Invalid URL test xihajun.com: Scheme missing
a: Invalid URL xihajun.com: Scheme missing
a: Invalid URL xihajun.com: Scheme missing
–2017-04-05 06:38:56– http://xihajun.com/
Resolving xihajun.com (xihajun.com)… 121.29.54.21, 14.204.144.173, 101.69.121.35, …
Connecting to xihajun.com (xihajun.com)|121.29.54.21|:80… connected.
HTTP request sent, awaiting response… 200 OK
Length: 125556 (123K) [text/html]
Saving to: `index.html.2′

100%[=====================================>] 125,556 156K/s in 0.8s

2017-04-05 06:39:01 (156 KB/s) – `index.html.2′ saved [125556/125556]

–2017-04-05 06:39:01– http://xihajun.com/
Reusing existing connection to xihajun.com:80.
HTTP request sent, awaiting response… 200 OK
Length: 125556 (123K) [text/html]
Saving to: `index.html.3′

100%[=====================================>] 125,556 –.-K/s in 0s

2017-04-05 06:39:01 (472 MB/s) – `index.html.3′ saved [125556/125556]

–2017-04-05 06:39:01– http://xihajun.com%20test/
Resolving xihajun.com test (xihajun.com test)… failed: Name or service not known.
wget: unable to resolve host address `xihajun.com test’
FINISHED –2017-04-05 06:39:01–
Total wall clock time: 4.8s
Downloaded: 2 files, 245K in 0.8s (312 KB/s)