While doing a mysql start you may sometimes get the following error:

Starting MySQLCouldn’t find MySQL manager (/var/lib/bin/mysql) or server (/var/lib/bin/mysqld_safe)

To fix this you need to comment out or remove the basedir directive line from /etc/my.cnf file

[mysql.server ]
server=mysql
#basedir=/var/lib

Now restart mysql

# service mysql restart