Just a guess that may help speed up a solution until a Linux guru pops in, find and edit the Linux equivalent of the Windows MySQL configuration file perhaps my.conf (my.ini or my.cnf) and find a similar following line uncomment it.
#bind-address = 127.0.0.1
So it looks like this:
bind-address = 127.0.0.1
Save the file and you may have to restart MySQL.
I don't have a Linux box to test this so please provide feedback if it helps.
This fix was first discovered in the Windows version.