After Upgrade for MySql 5.5 Mysql is Not Working any more all sites on Server Down

[majidakram]

Dear I have done upgrading mysql 5.1 to 5.5 via whm, its not working and unable to fix the the issue tried many solutions?

MA,

 

[cPanelPeter]

Hello,

Can you be a little more specific? What exactly isn't working? What errors are you getting (if any)? Have you looked atht error log file (/var/lib/mysql/HOSTNAME.err ?

If you need assistance, please open a support ticket using the link in my signature.

 

[Eric]

Howdy,

Did you recompile php? There will be different client libs for MySQL with the new version.

Thanks!