Resources

http://askubuntu.com/questions/46331/how-to-avoid-using-sudo-when-working-in-var-www
http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html
https://www.digitalocean.com/community/questions/sendmail-is-slow-to-send-mail
http://stackoverflow.com/questions/16988427/calling-one-bash-script-from-another-script-passing-it-arguments-with-quotes-and
http://stackoverflow.com/questions/525592/find-and-replace-inside-a-text-file-from-a-bash-command
http://stackoverflow.com/questions/356100/how-to-wait-in-bash-for-several-subprocesses-to-finish-and-return-exit-code-0
https://www.google.de/webhp?sourceid=chrome-instant&ion=1&espv=2&es_th=1&ie=UTF-8#q=fork++asynchronous+bash&*
https://www.google.de/search?q=fseek&oq=fseek&aqs=chrome..69i57.169j0j7&sourceid=chrome&es_sm=122&ie=UTF-8