If you want it to be understandable, I think it would be better for the service to implement the timer itself. (You could still use systemd timers to message such a service, but I don't think it would look very clean. Or write a service of your own which spawns child processes and watches their status :-). If you needed to add more complex controls than provided by cron, or even more complex controls than are possible with transient service units, you might need to find another task scheduler that has the features you need. I think older versions of systemd did not allow setting as many of the properties on the transient unit). 2700 Seconds Popular Preset Timers 1 min 5 min 10 min 15 min 30 min 45 min 1. (Exactly which properties you can set with systemd-run varies a bit. 45 Minute Timer BOMB With Giant Bomb Explosion - YouTube 0:00 / 45:30 45. If you like, you should be able to use options like -property RuntimeMaxSec=900 with systemd-run. And process P will not be killed when service S stops. systemd-run will not wait for P to finish (unless you use the -wait option). In other words, a systemd service S can use systemd-run to start a process P. By default, it automatically generates a unique name for the unit. systemd-run creates a transient service or scope unit. If you want to start a process asynchronously (and independently of any other instance), you can use systemd-run. So how can I make my systemd timer behave like the old cron script? My only remaining idea/workaround is to make two timers, set at 20 minute intervals, but that sounds like a really dumb idea. The cmd is not started or dies immediately. Tried things like ExecStart=/bin/sh -c '/run/my/cmd -options &' and with nohup and putting the whole command in a separate shell script to no avail. I've also attempted to make the service to run in the background, unmonitored by systemd, but I have not had much success with this. Is there any way to force the timer to do exactly as I want? But the associated service it starts runs slightly longer than 10 minutes, and this causes the timer to gradually drift by about 10 seconds per run. With cron this was not an issue, I simply had two instances running for a while, but systemd does not work the same.Īnd from what I understand, this is supposed to run at exactly 08:00:00, 08:10:00, 08:20:00, and so on and so forth. 15 second 30 second 1 minute 2 minute 3 minute 4 minute 5 minute 10 minute. 179K subscribers Subscribe Like Share 31M views 7 years ago This timer counts down silently until it reaches 0:00, then a police siren sounds to alert you that time is up. The problem is that the service it starts runs a while longer than 10 minutes. I had an old cron.d script (which executed faithfully once every 10 minutes) that I'm trying to modernize. Live 5/10/23 0 days 04 hours 36 minutes 52 seconds Time until Wednesday. Get an ||logic:if then|| block from Logic and put it in the ||input:on button pressed||.I have a rather annoying issue with systemd timers and drifting start time. Set the hour, minute, and second for the online countdown timer, and start it.In Input, find an ||input:on button pressed|| an put it somewhere on the workspace.The time count of seconds will increase by 10 each time the button is pressed. We’ll use button A to add 10 seconds to our time count. We’ll use one button for adding 10 seconds and another button for adding just 1 second. We’ll use the buttons to set the amount of time by adding both 10 seconds and single seconds. There has to be a way to set the time on your watch.

Let seconds = 0 Set the time with buttons Place the variable into the ||basic:on start|| block. Drag out a ||variables:set to|| block and change the name with the dropdown to seconds.

Ok, in Variables click on Make a Variable.

of at least 5 minutes before the hour to 5 minutes after, the ' zero check ' is.

Go into Basic in the toolbox and pull an ||basic:on start|| on to the workspace. At the buzz from the timer, the operator releases the vernier cranks.

We need a variable to keep track of how many seconds are left on the watch. Duration: ~10 minutes Make the time variable Let’s make a countdown timer and see the seconds tick by on your micro:bit watch.

Timer 5 minutes 10 seconds