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Question about FAT32 and RedHat Linux

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Baikonur:
What does "grep" mean and how is it used?

Stryker:

quote:Originally posted by Xenix God:
What does "grep" mean and how is it used?
--- End quote ---


easy, lets say i have some files in a directory:

cparty1 cparty2 cparty3 cb1 cb2 cb3

i only want to view the ones with party, so

ls | grep party

i can't think of how to explain it without using an example.

Baikonur:
Interesting Unixologism.

flap:
grep searches through specific files or standard input and prints any lines that match a particular pattern. It uses regular expressions so the pattern matching is very powerful.

A simple example:
grep '^fish[^ ]' ./*
will search through all files in the current directory and output any lines that begin with "fish", followed by any character other than a space.

Faust:
Or for example if I want to find all mp3 files on my hard drive to convert them to ogg files I just:
ls -R /home | grep mp3

ls lists all the files on my home dir with -R.
The pipe redirects that output (my list of files) to grep.
Grep only shows me the ones with the phrase "mp3" in them, so I get list of files which are mp3s.

Or another example:
cat ~/telephonenumbers.txt | grep Fred
Fred Bloggs   60 123 456 789

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