grep from bottom to top of a file

Question

hi, what is the option with grep or egrep through which we can search from bottom to up of a file normally they works in the top to bottom

Answer 1

tac your.log | grep stuff

Answer 2

If you can stand the delay, I'd consider just piping the result through the rev program.

Answer 3

#!/bin/bash

start=10
while true
do
  if tail -${start} "file" | grep -q "search" ;then
    tail -${start} "file" | grep "search"
    exit
  else
    ((start+=10))
  fi
done