Live Linux Forensics training coming up @WWHackinFest Deadwood! Let's do some daily Linux Forensics trivia as a lead-up! wildwesthackinfest.com/deadw…
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Daily Linux Forensics Trivia #31 - Name three places in Linux where scheduled tasks can be configured.
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Trivia Answer #31 - Kudos to @CraigHRowland for checking in with a scarily complete answer. Honorable mention to @jwmwi. The full answer is long, so buckle up friends...
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Let's start with traditional aka "Vixie" cron (yes, named after @paulvixie who isn't just "that BIND guy") which uses /etc/crontab, /etc/cron.d, and /var/spool/cron/crontabs

Oct 7, 2022 · 1:38 PM UTC

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Then there's Anacron which owns the /etc/cron.{hourly,daily,monthly} jobs
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Don't forget "at" jobs under /var/spool/at/spool or /var/spool/cron/atjobs
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And finally systemd gets into the mix (like it always does) with /etc/systemd/system/timers.target.wants and $HOME/.local/share/systemd