Basic Usage

Log: /var/log/yum.log

See if a package installed, or which version is available:

yum list $package

Search for a package:

yum search $package

Install a package:

yum install $package

Update a package:

yum update $package

Downgrade a package:

yum downgrade $package

Remove a package:

yum remove $package

Search for a file within a package:

yum provides */$package

View package dependencies:

yum deplist $package

View package details:

yum info $package

View installed repos:

yum repolist

Troubleshooting

Check /etc/resolv.conf. Make sure settings are correct.

Can often happen when the system is very low on RAM.

Make a backup:

mkdir /home/temp/rpmdb-bak/
cp -av /var/lib/rpm/__db* /home/temp/rpmdb-bak/

Remove the database:

rm -i /var/lib/rpm/__db*

Rebuild the database:

rpm --rebuilddb

Check:

yum repolist