If you work on the mysql command line, its nice to have an autocomplete similar to the linux bash where you press the TAB key and the commands complete.
In mysql, we can set it up to a degree to provide some hints when we type. Though it might not complete everything you type, it does complete table names etc.
2 ways to do it ( I am on CentOS 6.5 )
when you log into mysql, use the auto-rehash config option like
mysql --auto-rehash -u root -p
if this does not work, then try creating a file called .my.cnf in your home directory and put the below into it