16.04 - Cannot schedule GUI program - Ask Ubuntu


have been trying create daily task open gui program (for sake of argument firefox) using crontab not succeeding. @ least can't tell no message sent terminal.

i have followed instructions these sites:

to no avail.

while waiting answer on why crontab event not running interesting happened: script setup through crontab ran! turns out seems to using time of day without considering summer time. is, taking time fixed time utc not considering still summer time.

as example, task setup as:

52 13 * * * /home/username/my_script.sh

actually ran @ 14:52 (that clock @ top right corner of screen said). because still in summer time, concluding cron looks @ system clock , ignores fact have added 1 hour due summer time. using @rohitt vashishtha words: cron doesn't play nice timezones.


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