Yum

Links

• How to use yum command on CentOS/RHEL
• Fix yum errors

Cheatsheet

Show installed packages

yum list installed

What provides a certain file

yum whatprovides

Check updates

yum check-update -q

Check security updates

HAHA GOTCHA! no security metadata on CentOS! There is for EPEL though. see https://access.redhat.com/solutions/10021 On CentOS 6 first install

yum install yum-plugin-security

yum list-security -q --errorlevel=0

Clear cache

yum clean all

or

yum clean all --enablerepo='*'

List files form package

repoquery -l somepackage

Updateinfo file is not valid XML

remove yum-cron