On 06/02/2014 13:12, Gian Uberto Lauri wrote: > (you could use grep -e '^ii') or egrep '^ii', but I think it's not > worth the cpu used). You don't need -e to use anchors in the regex. Whilst -e would use more CPU than a plain grep, the anchor would likely reduce the work done (lines can be matched or discarded on the first character)