The original countdown.sh script was found from below link: http://linuxconfig.org/time-countdown-bash-script-example Start from the second commit, Tom Xue made some modification: a progress bar was added. Third commit, Lubos Rendek modifactions: improved full progress bar. Fri Apr 10 08:47:46 AEST 2015 ---------------------------- Seconds: 13 Minutes: 2 Hours: 0 Days: 0 Weeks: 0 [========> ]12% Page on http://linuxconfig.org/ updated to reflect the changes and link back to git repository.