On Sun, Jan 05, 2003 at 10:23:16PM +0200, Egor Tur wrote: > Hi. > Who can explain? > ps ax | grep lpd > 398 ? S 0:00 lpd Waiting > 5593 pts/13 S 0:00 grep lpd > ps ax | grep [l]pd > 398 ? S 0:00 lpd Waiting > > What do [l]?
When you do 'ps ax | grep [l]pd', the grep process that would show up in the ps output would be 'grep [l]pd' and that won't match 'lpd' which is what the '[l]pd' is expanded to by the shell. '[]' is a bracket expression that's part of regular expressions. It matches any one of the enclosed list of characters. -- Ron Golan GPG key http://home.attbi.com/~rgolan/gpg.asc -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
