countdown(1) General Commands Manual countdown(1) NAME countdown - count down a specified time interval SYNOPSIS countdown interval DESCRIPTION countdown counts down a specified time interval, then beeps and exits. I use it mainly as an egg timer. There are a number of different formats for specifying the time interval. A plain unadorned number is interpreted as seconds. % countdown 30 # 30 seconds You can also use a single-letter suffix to indicate units. Available suf- fices are s for seconds, m for minutes, h for hours, d for days, and w for weeks. Note that the number doesn't have to be an integer. % countdown 30s # 30 seconds % countdown 0.5m # also 30 seconds % countdown 12h # twelve hours % countdown 0.5d # also twelve hours % countdown 1.5w # one and a half weeks You can also string together two adjacent time units. % countdown 1m30s # 90 seconds % countdown 2h30m # two and a half hours % countdown 1d1h # twenty-five hours % countdown 1w3d # ten days In addition, you can specify a time of day, rather than a duration. % countdown 4:20am % countdown 4:20pm % countdown 4:20 % countdown 4:20:00am % countdown 4:20:00pm % countdown 4:20:00 AUTHOR Copyright (C) 2014,2015 by Jef Poskanzer <jef@mail.acme.com>. All rights reserved. 06 June 2015 countdown(1)
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