![]() Setterm -term linux -default # Clear setterm changes from aboveĮcho "00:00" # (I.e. Setterm -term linux -back red -fore white # use setterm to change background colorĮcho "00:00 " # extra tabs for visibility if time expired)įor i in `seq 1 180` # for i = 1:180 (i.e. MINS=$(( $ELAPSE/60 )) # Convert to minutes. 23 Minute Timers with Second If you need a 23 Minute timer with seconds please select one of the following timer. NOW=$(date +%s) # Get time now in secondsĭIF=$(( $NOW-$START )) # Compute diff in secondsĮLAPSE=$(( $DURATION-$DIF )) # Compute elapsed time in seconds Read -p "Timer for how many minutes?" -e DURATIONĭURATION=$(( $DURATION*60 )) # convert minutes to seconds I ended up writing my own shell script: GitHub gist #!/bin/sh To fix this problem, one must each loop iteration compute the precise time to sleep which is usually slightly less than a second (for one second interval timers). This error slowly accumulates and would over time make our stopwatch timer more and more imprecise. ![]() Even if one would just sleep 1 in a loop 10 times, the overall execution would take a bit more than 10 seconds because of the small overhead that comes from executing sleep and iterating the loop. The advantage of sleepenh is, that it is able to take into account the small delay that accumulates over time from the processing of other things than the sleep during a loop. For distributions that don't have it, it comes from The sleepenh tool comes from the package of the same name in Debian and its derivatives like Ubuntu. So for example you can say: $ time countdown 2m 4.6sĬountdown 2m 4.6s 0.00s user 0.00s system 0% cpu 2:04.60 totalĪnd as you can see, the command ran exactly for 2 minutes and 4.6 seconds without much magic in the script itself. On Debian and derivatives, this includes sub-second sleeps and a nice human-readable way to specify the time. Since the sleep command is used, this script allows to specify the duration for which to count in the same precision as your sleep allows. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic. The script can either be used as a stop watch (counting up until interrupted) or as a timer that runs for the specified amount of time. The tool that I have in my $PATH looks like this: #!/bin/sh The latter is inadequate because it keeps the CPU busy for no good reason. After enough time passed, the counter will skip a second. The former is inadequate because due to the small time spent doing the printing, the output will not actually happen once per second but a bit less than that which is suboptimal. Instead, the proposed solutions either use a sleep 1 between subsequent timer outputs or a busy loop that outputs as fast as possible. I'm surprised that nobody used the sleepenh tool in their scripts. In bash, add these lines to your ~/.bashrc (the sleep 0.1 will make the system wait for 1/10th of a second between each run so you don't spam your CPU): countdown() ))Ĭombine this with some way of playing sound in linux terminal ( Play MP3 or WAV file via the Linux command line) or Cygwin ( cat /path/foo.wav > /dev/dsp works for me in Babun/Windows 7) and you have a simple flexible timer with alarm! You can combine these into simple commands by using bash (or whichever shell you prefer) functions. ![]() If you need greater precision, you can use this to give you nanoseconds: while true do printf '%s\r' "$(date +%H:%M:%S:%N)" doneįinally, if you really, really want "stopwatch format", where everything starts at 0 and starts growing, you could do something like this: start=$(date +%s)įor a countdown timer (which is not what your original question asked for) you could do this (change seconds accordingly): seconds=20 That will show you the seconds passing in realtime and you can stop it with Ctrl+ C. If all you want is a stopwatch, you can do this: while true do printf '%s\r' "$(date)" done They use these tactics because they have proven to be effective.Ĭountdown timers are a crucial tool in your urgency-marketing toolbox.I'm not sure why you need beep. These companies are ruthlessly analytical and their tactics are driven by data and experimentation. "Less than 5 tickets left at this price", "Hurry, only 3 days until sale ends" or "Order by 5pm to receive next day shipping". Successful online store, or ticketing/booking website without being exposed to urgency or scarcity-based marketing tactics. There are a million reasons to "do it later".ĭominant and successful online businesses such as Ebay, Amazon and make extensive use of urgency as a means to drive action and increase conversions. Maybe they'll wait until they have more information, more money or more time. They want what you offer but they can always buy it later. Increase conversion rates using the magic of urgencyĪs an online marketer or e-commerce company what's your worst enemy? For many it's customer procrastination.
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