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I am on a 1604 system with timezone A, after I set the timezone to B using timedatectl set-timezone B, everything work fine.('timedatectl status' is B, 'date' command showing the right time, file time is correct after i create a new one)

But i found that rsyslogd was still working on timezone A, crond was also on timezone A, no sure if there are other daemon running on the old timezone so I reboot the system to avoid this.

Why those daemons didn't be updated with the new timezone?

  • Generally processes get their timezone during startup, and there is no easy way to update their timezone unless you restart them. An easy way would be to restart the whole system. If you are really annoyed that some processes use the old timezone, and you seem not to have an easy way to restart them, schedule a system restart at an appropriate time. – FedonKadifeli May 23 '19 at 9:00
  • @FedonKadifeli please don't answer questions in comments. – terdon May 23 '19 at 11:39
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Yes. You will need to restart the cron and rsyslog services on your system. They obtain their timezones when they start up, and don't detect overall system timezone changes.

service cron restart
service rsyslog restart

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