On 2011.12.28. 23:35, Randy Bush wrote: > FreeBSD ran.psg.com 10.0-CURRENT FreeBSD 10.0-CURRENT #4: Sat Dec 24 12:33:51 UTC 2011 root at ran.psg.com:/usr/obj/usr/src/sys/RAN amd64 > > % echo foo | grep foo > % > > What about 'grep -V'? Or 'which grep'? Gabor