In general, Fedora21 does not install updates automatically unless you have it configured that way (using either yum-updatesd
or an hourly/daily/weekly cronjob that executes something like su -c 'yum update'
, or yum-cron
.
Check the Fedora's wiki page for auto-update to see whether it's set-up on your system.
If by "turnoff automatic updates" you mean updating the metadata of your installed repos you do this:
Open the yum config file /etc/yum.conf (sudo gedit /etc/yum.conf
) an increase the value for metadata_ expire to your desired value. The higher this value the less frequent Fedora will download package information from the repos you have installed.
Nevertheless, I do not recommend not keeping the metadata up-to-date!
What you could do in order to use less bandwidth for your update process is using the parameter called bandwith in /etc/yum.conf (i.e. bandwidth=20%). Check out man yum.conf
or this page for a description of the parameter and other neat stuff you can configure...