Solution for Linux users who cannot call system commands

In Linux, I was asked how common user user1 could not use commands such as reboot and shutdown.

In fact, this problem is very simple and well solved.

Here we need to use the special permission command of linux: grant of suid permission.

For example, if you log on to user1 as a common user and want to use the reboot command, you will be prompted that you do not have the permission to execute this command.

However, if you modify the permission of the configuration file of this command, you can log on to the common user to use this command.

First, log on to the system as the root user;

Then, press "which reboot" to obtain the absolute path of the reboot configuration file/sbin/reboot.

Then grant the/sbin/reboot File Permission S,

Chmod 4744/sbin/reboot

Switch to user1: su-user1

Run the reboot command again.