Colored tail -f version: With this shellscript you'll be able to see your system/server logs with personalized colors in personalized lines containing certain words.

supertail

#!/bin/bash


function usage
{
    echo "usage: supertail -f file [-bl word1 -m word2 -g word3 -w word4 -bk word5 ...] "
    echo "bl=blue, bk=black, g=green, m=magenta, r=red, c=cyan, w=white, y=yellow, etc."
}


while [ "$1" != "" ]; do
    case $1 in
        -f | --file )           shift
                                filename=$1
                                ;;
        -bl| --blue )           shift
                                blueword=$1
                                perl=$perl's/.*\b('$1')\b.*/\e[1;37;44m$&\e[0m/g;'
                                ;;
        -m | --magenta )        shift
                                magentaword=$1
                                perl=$perl's/.*\b('$1')\b.*/\e[1;37;45m$&\e[0m/g;'
                                ;;
        -bk| --black )          shift
                                blackword=$1
                                perl=$perl's/.*\b('$1')\b.*/\e[1;37;40m$&\e[0m/g;'
                                ;;
        -r | --red )            shift
                                redword=$1
                                perl=$perl's/.*\b('$1')\b.*/\e[1;37;41m$&\e[0m/g;'
                                ;;
        -g | --green )          shift
                                greenword=$1
                                perl=$perl's/.*\b('$1')\b.*/\e[1;37;42m$&\e[0m/g;'
                                ;;
        -y | --yellow )         shift
                                yellowword=$1
                                perl=$perl's/.*\b('$1')\b.*/\e[1;37;43m$&\e[0m/g;'
                                ;;
        -c | --cyan )           shift
                                cyanword=$1
                                perl=$perl's/.*\b('$1')\b.*/\e[1;37;46m$&\e[0m/g;'
                                ;;
        -w | --white )          shift
                                whiteword=$1
                                perl=$perl's/.*\b('$1')\b.*/\e[1;37;47m$&\e[0m/g;'
                                ;;
        * )                     usage
                                exit 1
    esac
    shift
done

sudo tail -f $filename | perl -pe $perl

wtf, super useful