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Scheduled updates with cron job

If you want to install updates on a server you may want it done at night when users are sleeping (hopefully).

That is not that difficult with a shell script and a cron job. The shell script takes care of calling all the update commands and the cron job schedules the executing and log the output to a custom log file.

First the shell script:

#!/bin/sh
echo "\nUpdate on: $(date)\n"
echo 'Update the packages list\n'
sudo /usr/bin/apt-get update >> /dev/null 2>&1
echo '\nUpgrade to latest package version\n'
sudo /usr/bin/apt-get upgrade --yes
echo '\nUpgrade the distribution\n'
sudo apt-get dist-upgrade --yes
echo '\nCleanup\n'
sudo /usr/bin/apt-get autoremove --yes
sudo /usr/bin/apt-get autoclean --yes
sudo /usr/bin/apt-get clean --yes
#
# The End
#

The script executes after all a bit of cleanup.

Put the "update.sh" script in a folder and make it executable:

$ chmod +x update.sh


Now the cron job rule:

open crontab as root:

$ sudo crontab -…