Open ~/.bash_profile and insert this line. Once it is in the bash profile you can run the following in the console: locate.update That will then execute the command which will update the locate database.
alias locate.update="sudo /usr/libexec/locate.updatedb"
After locate database has been updated, go into console and to search for something type the following:locate <filename> Where <filename> is the file you are looking for. It will locate the entire file system. It's really useful if you are looking for a piece of software you installed and don't remember it was suppose to be installed.