Time countdown bash script example
Last Updated on Friday, 11 June 2010 21:27 Friday, 11 June 2010 20:50
This is a simple skeleton of a bash countdown script. The script takes two arguments . Here are some examples of its usage:
- countdown time to 90 minutes from now:
./bash-countdown.sh -m 90
- countdown time to 23.3.2036 from now:
./bash-countdown.sh -d "Mar 23 2036"
- countdown time to 21:06 from now:
./bash-countdown.sh -d 21:06
- countdown time to 21:06:45 from now:
./bash-countdown.sh -d 21:06:45
Feel free to modify this script according to your needs:
bash-countdown.sh :
#!/bin/bash if [ "$#" -lt "2" ] ; then echo "Incorrect usage ! Example:" echo './countdown.sh -d "Jun 10 2011 16:06"' echo 'or' echo './countdown.sh -m 90' exit 1 fi now=`date +%s` if [ "$1" = "-d" ] ; then until=`date -d "$2" +%s` sec_rem=`expr $until - $now` echo "-d" if [ $sec_rem -lt 1 ]; then echo "$2 is already history !" fi fi if [ "$1" = "-m" ] ; then until=`expr 60 \* $2` until=`expr $until + $now` sec_rem=`expr $until - $now` echo "-m" if [ $sec_rem -lt 1 ]; then echo "$2 is already history !" fi fi while [ $sec_rem -gt 0 ]; do clear date let sec_rem=$sec_rem-1 interval=$sec_rem seconds=`expr $interval % 60` interval=`expr $interval - $seconds` minutes=`expr $interval % 3600 / 60` interval=`expr $interval - $minutes` hours=`expr $interval % 86400 / 3600` interval=`expr $interval - $hours` days=`expr $interval % 604800 / 86400` interval=`expr $interval - $hours` weeks=`expr $interval / 604800` echo "----------------------------" echo "Seconds: " $seconds echo "Minutes: " $minutes echo "Hours: " $hours echo "Days: " $days echo "Weeks: " $weeks sleep 1 done
Do not forget to make bash-countdown.sh script executable before execution:
$ chmod +x bash-countdown.sh
Exectute:
./bash-countdown.sh -d 22:34
Output:
Fri Jun 11 20:55:19 EST 2010 ---------------------------- Seconds: 40 Minutes: 38 Hours: 1 Days: 0 Weeks: 0















