Originally Posted by Disillusionist
To unzip you use the bunzip2 command, however you cannot pass that to grep as shown in your example...
Ooops, why can't one pass the output of bunzip2 to grep? Normally when you don't specify an output file one should be able to catch the output via a pipe
<Edith says>: Okay, okay, you are right and I read the man page
. bzip2 creates automatically outputfiles with an bz2 extension and vice versa.