topic Re: prevent cntrl alt delete from rebooting server at login prompt on console in Operating System - Linux

prevent cntrl alt delete from rebooting server at login prompt on console

Ratzie — Thu, 04 May 2006 15:56:15 GMT

Is there a way to prevent someone from walking by and hit the CNTRL ALT DELETE when server is at the login prompt on the console.

I did it by accident, (Ahhh a windows thing) wanted to log out, and the server instantly rebooted.

Re: prevent cntrl alt delete from rebooting server at login prompt on console

Jeff_Traigle — Thu, 04 May 2006 16:09:42 GMT

There's an entry something like the following in /etc/inittab:

ca::ctrlaltdel:/sbin/shutdown -t3 -r now

Comment this line and run "/sbin/init q".

Vaguely recalled it was something simple, but found the details on the following web page:

http://www.ecst.csuchico.edu/~dranch/LINUX/TrinityOS/cHTML/TrinityOS-c-8.html

Re: prevent cntrl alt delete from rebooting server at login prompt on console

dirk dierickx — Fri, 05 May 2006 01:09:58 GMT

you can also replace the shutdown command with any command you like. 'logger' for example to put a message on the console and syslog saying that 'ctrl-alt-del is disabled'.

Re: prevent cntrl alt delete from rebooting server at login prompt on console

Steven E. Protter — Fri, 05 May 2006 06:09:35 GMT

Shalom,

This may seem like a good idea, but it is a customization that all operators and consultants will need to know.

I can almost guarantee that some day you will get a call from an operator, manager or consulting whining that they need to boot the system but can not.

SEP

Re: prevent cntrl alt delete from rebooting server at login prompt on console

Ratzie — Fri, 05 May 2006 08:13:20 GMT

That was the file I modified. Just never did the init q.

Well reboot fixed it anyway.