Unix Helpers

grep

Colored output

Colered Output of a complete file. The regular expression "|$" matches those line that matches the pattern AND have an endline. This are ALL lines of the file!

• http://stackoverflow.com/questions/981601/colorized-grep-viewing-the-entire-file-with-highlighting

egrep --color "pattern|$" file
grep --color -E "pattern|$" file

• http://superuser.com/questions/175527/is-there-a-tool-that-beeps-and-highlights-matching-lines-that-are-piped-through

#!/bin/bash

regex="${1}"
color="${2}"

[ ${color} = "" ] && color=1  #defaults to green

# 1 green
# 3 red 
highlight_on=$(tput setaf 2) # green, use setab to do inverse instead of foreground
highlight_off=$(tput sgr0) # reset to standard color scheme

while read line
do
    $line =~ $regex  && echo -n $"$highlight_on"
    echo "$line$highlight_off" 
done