Start with the troubleshooting section of the manual.
Is the server running?
Where did it put the socket file?
What program gave you that error?
What system are you running?
What version of MySQL is this?
Where did you get it?
How did you install it?
So many questions. So few answers.
> Dear :
> There are a message error display ...
> Can't connect to database : Can't connect t local MySQL server through
> socket '/var/lib/mysql/mysql.sock' (111)
> How and where that I can trouble shooting it ?
> Best Rgards
Gerald L. Clark