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How to enable yum-cron on Amazon Linux 2, CentOS and RHEL servers to automatically install updates
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yum-cron.md

Automatic updates with yum-cron

If you are on RHEL make sure optional repos are enabled:

subscription-manager repos --enable rhel-7-server-optional-rpms

Then install yum-cron:

yum -y install yum-cron

Enable yum-cron:

systemctl enable yum-cron.service

Edit yum cron config:

vim /etc/yum/yum-cron.conf

make sure apply_updates is set to yes:

# Whether updates should be applied when they are available.  Note
# that download_updates must also be yes for the update to be applied.
apply_updates = yes

Start the service:

systemctl start yum-cron.service

Check status of the service, make sure it’s up:

systemctl status yum-cron.service

active (exited) is the desired value.

Monitor the log files using:

tail -f /var/log/yum.log

and

tail -f /var/log/cron

Or using multitail (yum install multitail)

multitail -f /var/log/cron /var/log/yum.log
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