shell_exec |允许特定的程序在Apache用户下运行

Question

我可以运行特定的命令/程序，如x服务器，需要从PHP使用shell_exec的root权限。我只想从php shell_exec（）运行x服务器程序。 注意：php在suphp下运行，操作系统是centos。

Answer 1

看看为SUID UND SGID在UNIX文件上

SUID stands for Set User ID. This means that if the SUID bit is set for any application then your user ID would be set as that of the owner of application/file rather than the current user, while running that application. That means in case I have an application whose owner is ' root ' and it has its SUID bit set, then when I run this application as a normal user, that application would still run as root. Since the SUID bit tells Linux that the the User ID root is set for this application and whenever this application executes it must execute as if root was executing it (since root owns this file).