CentOS disables pressing Ctrl-Alt-Del to restart the system

CentOS disables pressing Ctrl-Alt-Del to restart the system

In Linux, for security considerations, we allow anyone to press Ctrl-Alt-Del to restart the system. However, in the production environment, press Ctrl-Alt-Del to restart the system.

[root@localhost~] #cat/etc/inittab #TrapCTRL-ALT-DELETE #ca::ctrlaltdel:/sbin/shutdown-t3-rnow

We can also change the 'Ca: ctrlaltdel: 'line to output logs. If anyone wants to use this hotkey to restart the server, there will be logs,

[root@localhost~]#cat/etc/inittab #TrapCTRL-ALT-DELETE ca::ctrlaltdel:/bin/logger-pauthpriv.warning-tinit "Console-invokedCtrl-Alt-Delwasignored"

Under RHEL6.X and CentOS 6. X

In RHEL6.X and CentOS 6. X, the actions of the hotkey are as follows'/Etc/init/control-alt-delete.conf 'control.

Step 1: Back up the configuration with the following command before the change

[root@localhost~]#cp-v/etc/init/control-alt-delete.conf/etc/init/control-alt-delete.override

Step 2 edit the file and replace the 'exec/sbin/shutdown 'line with the following configuration. This configuration will output the log every time you press Ctrl-Alt-Del:

[root@localhost~]#cat/etc/init/control-alt-delete.confexec/usr/bin/logger-pauthpriv.notice-tinit