Please use sentences and proper English.
We need to know exactly what distribution+version you are running,& which version of MySQL.
Please try these cmds as root user and post the results
rpm -qa|grep -i mysql
We also need details ie exactly what do you want to do, exactly what cmd you tried and what msgs you got.
Please copy and paste the cmds/msgs; do not try to describe or summarise them instead.
Incidentally, here is the MySQL site with full docs with examples https://dev.mysql.com/doc/refman/5.1/en/