if you have linux installed on your pc and you did try to install mysql taking the packages from your Linux distribution sources and you get an error after you are trying to start mysql as:
ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’ (2)
ususally this error arrives from starting mysql from non good path, you may try with the root user:
/etc/init.d/mysql start
/etc/init.d/mysql stop
good luck 🙂