Systemd timer units: two things cron still cant do

Short summary

Systemd timers fix two critical cron limitations: they inherit the full shell environment (fixing PATH issues) and prevent concurrent executions of the same job. For production systems, systemd timers provide superior control, better logging, and automatic handling of missed runs.

• •Cron's stripped-down environment causes silent failures when calling binaries outside /usr/bin:/bin
• •Systemd timers prevent concurrent job executions and catch up on missed runs automatically
• •Systemd logs go to journald instead of scattered across mail and logs

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