Linux has the ability to run a shell script whenever desired. We use one to automatically install updates and if necessary reboot the system.
sudo apt-get needrestart
adding this program makes it easier to test for reboot required due to a kernel update etc.
will reboot if the system is prompting for a reboot
so to mechanize updates:
sudo nano update
then add these lines to the update file
sudo apt-get update sudo apt-get upgrade needrestart -k
now to schedule we need to add this to the crontable
sudo crontab -e
add this line to the bottom
29 0 * * * bash /home/myaccount/update
this will allow you to add your updates file. make sure you add the fill path so that it will be able to find it
now the system will be updated automatically and edits to the original update can be done as needed
permission is needed for the cron task so making it world readable is easy, chron needs read and execute while the owner has total read/writecontrol
sudo chmod 755 update
minute hour day month day-of-week command-line-to-execute
- minute (from 0 to 59)
- hour (from 0 to 23)
- day of month (from 1 to 31)
- month (from 1 to 12)
- day of week (from 0 to 6) (0=Sunday)
0 */2 * * * // is every other hour etc
delimiters are the space, the comma and / are special modifiers.