greg, egrep, fgrep, what's the difference
Posted 04/02/2009 - 14:49 by Webmaster
Problem:
When running a grep command there are multiple varieties, which one should I use?
Solution:
There are three versions of the grep command:
| Command | Functionality |
|---|---|
| grep | basic regular expressions |
| egrep | uses extended regular expressions slowest |
| fgrep | no regular expressions fastest |
When working with smaller files, the time may be negligible, however, in all cases egrep is considered the slowest overall.
