On Wed, 2003-11-19 at 08:18, William Page wrote: > Why is that, anyway? Isn't grep by definition "get regular expression and > print"? Why do you have to use egrep to use REs?
You are right. grep works just fine. egrep uses the "extended regular expressions" which I believe or more flexible and perl-like. > > William > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > On Behalf Of Michael Torrie > > Sent: Wednesday, November 19, 2003 8:04 AM > > To: [EMAIL PROTECTED]; BYU Unix Users Group > > Subject: Re: [uug] Help with Regular expressions and backing up files > > > > On Wed, 2003-11-19 at 00:11, Richard Esplin wrote: > > > grep -v will do an invert match, only returning the files that don't > > contain > > > the specified strings. You could then send that list to cp to make your > > > backups (make sure to use the -p flag to preserve permissions). > > > But unison is a tool that will do exactly what you want. If you put > > your list > > > of files in the ignore list in your preferences file, then unison will > > never > > > touch them. unison has a lot of other features too, so perhaps it is > > overkill > > > for your purposes. > > > > Good idea. Furthermore, though, you should probably be using egrep, not > > grep, since it does regular expressions. > > > > Michael > > > > ____________________ > BYU Unix Users Group > http://uug.byu.edu/ > ___________________________________________________________________ > List Info: http://uug.byu.edu/cgi-bin/mailman/listinfo/uug-list -- Michael L Torrie <[EMAIL PROTECTED]> ____________________ BYU Unix Users Group http://uug.byu.edu/ ___________________________________________________________________ List Info: http://uug.byu.edu/cgi-bin/mailman/listinfo/uug-list
