Disable "New release available" emails on Ubuntu
Monday, August 15th, 2016
We have our Ubuntu machines set up to mail us the output of cron jobs like so:
$ cat /etc/crontab SHELL=/bin/sh PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin MAILTOemail@example.com # m h dom mon dow user command
This is encrible useful, since cronjobs should never output anything unless something is wrong.
Unfortunately, this means we also get emails like this:
/etc/cron.weekly/update-notifier-common: New release '16.04.1 LTS' available. Run 'do-release-upgrade' to upgrade to it.
You can fairly easily disable these by modifying the corresponding cronjob
#!/bin/sh set -e [ -x /usr/lib/ubuntu-release-upgrader/release-upgrade-motd ] || exit 0 # Check to see whether there is a new version of Ubuntu available -/usr/lib/ubuntu-release-upgrader/release-upgrade-motd +/usr/lib/ubuntu-release-upgrader/release-upgrade-motd > /dev/null
Now you'll no longer receive these emails. It's also possible to remove the cronjob entirely, but then an upgrade is likely to put it back, and I have no idea if the cronjob has any other side effects besides emailing.
Update: Raf Czlonka emailed me with the following addendum:
I wanted to let you know that there's still one place which makes you see the annoying prompt:
an easier way to get rid if the "issue" is simply to run this:
# sed -i 's/^Prompt.*/Prompt=never/' /etc/update-manager/release-upgrades