apache.sh

#!/bin/bash
# A little practice with sed from Georgi Naumov

stringToAppend="# we want to add this string\n"
filePath="apache2.conf"

# This will add bellow commend before the first occurence
# of LogFormat
# -r extended regular expression
# -i - in place 
sed -ri '0,/(\bLogFormat\b)/s//'"$stringToAppend"'\1/' $filePath
printf "All done!\n"