Disable Ctrl-Alt-Del to restart the system in CentOS

Disable Ctrl-Alt-Del to restart the system in CentOS

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

In this article, we will introduce how to disable the hotkey in RHEL and CentOS.

### Under RHEL 5.x and CentOS 5.x ###

ProtectionThe init process is exempt fromCtrl-Alt-Del, edit as below'/Etc/inittab''A line starting with ca: ctrlaltdel:

[root@localhost ~]# cat /etc/inittab# Trap CTRL-ALT-DELETE#ca::ctrlaltdel:/sbin/shutdown -t3 -r now

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# Trap CTRL-ALT-DELETEca::ctrlaltdel:/bin/logger -p authpriv.warning -t init "Console-invoked Ctrl-Alt-Del was ignored"

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 -p authpriv.notice -t init "Ctrl-Alt-Del was pressed and ignored"

Via: http://www.linuxtechi.com/disable-reboot-using-ctrl-alt-del-keys/

Author: Pradeep Kumar Translator: 2q1w2007 Proofreader: wxy

This article was originally translated by LCTT and launched with the Linux honor in China