topic grep pattern in Operating System - HP-UX

grep pattern

Dave Chamberlin — Mon, 02 Apr 2001 19:51:39 GMT

I have some files with a date sring of the format "01-10-99" in them. I can do cat myfile | grep '01-' to get all in Jan, or cat myfile | grep '\-99' to get all in 99, but I can't find a grep pattern match to get all jan 99 - ie '01-*-99' does not work, although it does work if I am using ls | grep a*c etc. What am I missing?

Re: grep pattern

Kevin Wright — Mon, 02 Apr 2001 20:04:43 GMT

i do not think grep or egrep allows an 'and' character, another way to do this is...
grep 01 > /tmp/jan
grep 99 /tmp/jan

however,the 'or' is allowed
egrep 'exp1|exp2' file

Re: grep pattern

Christopher Caldwell — Mon, 02 Apr 2001 20:06:43 GMT

01-10-99
egrep "01-[[:digit:]][[:digit:]]-99"

Re: grep pattern

Dave Chamberlin — Mon, 02 Apr 2001 20:32:21 GMT

thanks for the quick responses - chris' solution works just fine!

Re: grep pattern

Thierry Poels_1 — Tue, 03 Apr 2001 07:30:50 GMT

Hi,
less foolproof, but less typing work ;)

grep "01-..-99" yourfile

regards,
Thierry.