I got really intrigued with the wp-cli tool for command line WordPress (seriously awesome, check it out)… however I haven’t switched my osx machine to use the built in php and mysql so I kept getting this error:

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

Easy fix:

sudo ln -s /Applications/MAMP/tmp/mysql/mysql.sock /tmp/mysql.sock

And BOOM! I’ve got wp-cli working now.