通过PHP在远程计算机上执行命令 [英] Execute commands on remote machine via PHP

问题描述

要提供有关我的环境的背景:

To give background on my environment:

我有3台机器A，B和C

I have 3 machines A, B & C

A =网络服务器，运行一个php网站，该网站基本上充当B&的接口. C

A = Webserver, running a php website which basically acts as an interface for B & C

B = Linux Ubuntu计算机，我具有root访问权，SSH和通过SSH客户端在计算机上工作所需的所有好处(我有此服务器的.ppk私钥文件)

B = Linux Ubuntu machine, i have root access, SSH and all the needed goodness to work on the machine via a SSH client (i have a .ppk private key file for this server)

C =在Linux上运行的MySql数据库服务器

C = MySql Database server running on Linux

我可以在C(Mysql)上成功地从A(php)执行查询并返回结果.但是现在我试图从A在B上执行linux命令.

I can successfully execute queries from A (php) on C (Mysql) and return the results. But now im trying to execute linux commands on B from A.

例如.

我有一个在B上运行的脚本，并且想从A(php)执行命令以显示脚本的状态.

I have a script thats running on B and would like to execute a command from A (php) to show the status of the script.

在命令行中这样做很容易-./SomeScript状态

In Command line to do this is easy - ./SomeScript status

但是我想在服务器A上托管的网站中显示此脚本的状态.

But i want to show the status of this script in the website im hosting on Server A.

即使只是检查服务器A上服务器B的正常运行时间.

Even just check the uptime of Server B on Server A.

这是否有可能.我似乎一直在搜索Google，但是我什么都没找到.如果连接是否安全，我不会太过分阶段，因为这是一个封闭的网络，无法从外部访问该网络.

Is this in anyway possible. i have googled forever as it seems but im not getting anywhere, Im not too phased if the connection is secure or not as this is a closed network with no outside access to this network.

任何建议将不胜感激.

谢谢

推荐答案

在服务器A上通过PHP运行SSH命令到服务器B.

Run SSH commands through PHP on server A to server B.

以下是在Linux中使用命令行运行ssh命令的方法:

Here is how to run ssh commands with the command line in linux: http://www.youtube.com/watch?NR=1&feature=fvwp&v=YLqqdQZHzsU

为了在Linux上使用PHP运行命令，请使用 exec()命令.

In order to run commands on linux with PHP use the exec() command.

我希望这会帮助您开始朝正确的方向看.

I hope this will get you started looking in the right direction.

查看这两篇文章以自动执行密码提示

Look at these two posts for automating the password prompt

• https://serverfault.com/questions/241588/how-to -automatic-ssh-login-with-password
• https://serverfault.com/questions/187036/execute-ssh-command-without -密码

• https://serverfault.com/questions/241588/how-to-automate-ssh-login-with-password
• https://serverfault.com/questions/187036/execute-ssh-command-without-password

以下是使用 无效 代码的快速示例，可以让您思考:

Here is a quick example with non-working code to get you thinking:

<?php

    $server = "serverB.example.org";
    //ip address will work too i.e. 192.168.254.254 just make sure this is your public ip address not private as is the example

    //specify your username
    $username = "root";

    //select port to use for SSH
    $port = "22";

    //command that will be run on server B
    $command = "uptime";

    //form full command with ssh and command, you will need to use links above for auto authentication help
    $cmd_string = "ssh -p ".$port." ".$username."@".$server." ".$command;

    //this will run the above command on server A (localhost of the php file)
    exec($cmd_string, $output);

    //return the output to the browser
    //This will output the uptime for server B on page on server A
    echo '<pre>';
    print_r($output);
    echo '</pre>';
?>

建议的流程是在服务器A上运行命令以SSH到服务器B

The recommended flow is to run a command on server A to SSH to server B

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