从 URL 执行 bash 脚本
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Execute bash script from URL
提问by Tristan
Say I have a file at the URL "http://mywebsite.com/myscript.txt" that contains a script:
假设我在 URL“http://mywebsite.com/myscript.txt”有一个包含脚本的文件：
#!/bin/bash
echo "Hello, world!"
read -p "What is your name? " name
echo "Hello, ${name}!"
And I'd like to run this script without first saving it to a file. How do I do this?
我想在不先将它保存到文件的情况下运行这个脚本。我该怎么做呢？
Now, I've seen the syntax:
现在，我已经看到了语法：
bash < <(curl -s http://mywebsite.com/myscript.txt)
But this doesn't seem to work like it would if I saved to a file and then executed. For example readline doesn't work, and the output is just:
但这似乎不像我保存到文件然后执行那样工作。例如 readline 不起作用，输出只是：
$ bash < <(curl -s http://mywebsite.com/myscript.txt)
Hello, world!
Similarly, I've tried:
同样，我试过：
curl -s http://mywebsite.com/myscript.txt | bash -s --
With the same results.
结果相同。
Originally I had a solution like:
最初我有一个解决方案，如：
timestamp=`date +%Y%m%d%H%M%S`
curl -s http://mywebsite.com/myscript.txt -o /tmp/.myscript.${timestamp}.tmp
bash /tmp/.myscript.${timestamp}.tmp
rm -f /tmp/.myscript.${timestamp}.tmp
But this seems sloppy, and I'd like a more elegant solution.
但这似乎草率，我想要一个更优雅的解决方案。
I'm aware of the security issues regarding running a shell script from a URL, but let's ignore all of that for right now.
我知道有关从 URL 运行 shell 脚本的安全问题，但现在让我们忽略所有这些问题。
采纳答案by geekosaur
source <(curl -s http://mywebsite.com/myscript.txt)
ought to do it. Alternately, leave off the initial redirection on yours, which is redirecting standard input; bashtakes a filename to execute just fine without redirection, and <(command)syntax provides a path.
应该这样做。或者，不要对您的初始重定向进行重定向，即重定向标准输入；bash需要一个文件名在没有重定向的情况下执行得很好，并且<(command)语法提供了一个路径。
bash <(curl -s http://mywebsite.com/myscript.txt)
It may be clearer if you look at the output of echo <(cat /dev/null)
如果你看一下输出可能会更清楚 echo <(cat /dev/null)
回答by Random832
Try just:
试试吧：
bash <(curl -s http://mywebsite.com/myscript.txt)
回答by amra
Using wget, which is usually part of default system installation:
使用wget，这通常是默认系统安装的一部分：
bash <(wget -qO- http://mywebsite.com/myscript.txt)
回答by luismartingil
You can also do this:
你也可以这样做：
wget -O - https://raw.github.com/luismartingil/commands/master/101_remote2local_wireshark.sh | bash
回答by Anandi Das
This is the way to execute remote script with passing to it some arguments (arg1 arg2):
这是通过传递一些参数（arg1 arg2）来执行远程脚本的方法：
curl -s http://server/path/script.sh | bash /dev/stdin arg1 arg2
回答by Thomas Decaux
Also:
还：
curl -sL https://.... | sudo bash -
回答by user77115
For bash, Bourne shell and fish:
对于 bash、Bourne shell 和 fish：
curl -s http://server/path/script.sh | bash -s arg1 arg2
Flag "-s" makes shell read from stdin.
标志“-s”使外壳从标准输入读取。
回答by ling
Just combining amra and user77115's answers:
只需结合 amra 和 user77115 的答案：
wget -qO- https://raw.githubusercontent.com/lingtalfi/TheScientist/master/_bb_autoload/bbstart.sh | bash -s -- -v -v
It executes the bbstart.sh distant script passing it the -v -v options.
它执行 bbstart.sh 远程脚本并传递 -v -v 选项。
回答by Katie MC
Use:
用：
curl -s -L URL_TO_SCRIPT_HERE | bash
For example:
例如：
curl -s -L http://bitly/10hA8iC | bash
回答by Chinglin Wen
I often using the following is enough
我经常使用以下就足够了
curl -s http://mywebsite.com/myscript.txt | sh
But in a old system( kernel2.4 ), it encounter problems, and do the following can solve it, I tried many others, only the following works
但是在旧系统（ kernel2.4 ）中，它遇到问题，执行以下操作可以解决它，我尝试了很多其他系统，只有以下有效
curl -s http://mywebsite.com/myscript.txt -o a.sh && sh a.sh && rm -f a.sh
Examples
例子
$ curl -s someurl | sh
Starting to insert crontab
sh: _name}.sh: command not found
sh: line 208: syntax error near unexpected token `then'
sh: line 208: ` -eq 0 ]]; then'
$
The problem may cause by network slow, or bash version too old that can't handle network slow gracefully
问题可能是网速慢，或者bash版本太旧无法优雅处理网速
However, the following solves the problem
但是，以下解决了问题
$ curl -s someurl -o a.sh && sh a.sh && rm -f a.sh
Starting to insert crontab
Insert crontab entry is ok.
Insert crontab is done.
okay
$
