When use cookie based authentication with phpymyadmin, mcrypt is missing on CentOS 6.2 by default.

Problem can be solved by installing EPEL repository.

For CentOS 6.2 x86_64, below is the steps to install mcrypt:


rpm -ivh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-6.noarch.rpm

yum update

yum install php-mcrypt