Oh my god yes. Systems timers are doubleplus ungood.
Unless you want to run something every thirty seconds.
Or have it run, if the computer wasn't turned on when the task should have run.
You can run the command with time, get the real field, subtract from 30, sleep that amount and run the command again in a script, and call that every minute from cron.
If the command is really instant you can do "command & sleep 30; command".
heh.
loading story #50468348
workarounds are ugly. why not just have the ability to begin with?
loading story #50467770