Q: How to disable Ctrl+Alt+Del from restarting computer in Console mode?

1. Read General Notes

2. sudo cp /etc/inittab /etc/inittab_backup
   sudo gedit /etc/inittab

3. Find this line

   ...
   ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now
   ...

4. Replace with the following line

   #ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now

5. Save the edited file (sample)

6. sudo telinit q