yum -y install mathtools
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: centos.mirror.rafal.ca
* epel: mirror.steadfast.net
* extras: mirror.agmn.ca
* rpmforge: repoforge.mirror.constant.com
* updates: centosb5.centos.org
extras | 3.4 kB 00:00
rpmforge | 1.9 kB 00:00
updates | 3.4 kB 00:00
updates/primary_db | 1.9 MB 00:00
vz-base | 951 B 00:00
vz-updates | 951 B 00:00
Error: database disk image is malformed
Solution:
yum clean all