ls ~/videos/*.wmvYou just learned how to find a file in a directory full of files, but there's a faster method. If you knew that the video of Tiger Woods you're looking for was in Windows Media format (Boo! Hiss!) and therefore ended with .wmv, you could use a wildcard to show just the files that end with that particular extension. $ ls ~/videos Ubuntu_Talk.mpeg nerdtv_1_andy_hertzfeld airhorn_surprise.wmv nerdtv_2_max_levchin apple_navigator.mov nerdtv_3_bill_joy b-ball-e-mail.mov RPG_Nerds.mpeg carwreck.mpg tiger_woods_just_did_it.wmv $ ls ~/videos/*.wmv airhorn_surprise.wmv tiger_woods_just_did_it.wmv There's another faster method, also involving wildcards: Look just for files that contain the word tiger. $ ls ~/videos/*tiger* tiger_woods_just_did_it.wmv |