Note that in a file-based event inotify - get your file system supervised handles filesystem events rather than time periods.

From personal use

  • @reboot and others macros
  • environment variable enforced
    • declare those at the beginning of the crontab
    • e.g. DISPLAY (easy since fixed) or SSH_AUTH_SOCK (more complicated as changing)
  • using for Irssi for CognitiveEnvironments#TasksByEfficiency
  • used pycron cron service written in Python on Windows
  • on windows hide commands
    • try START /MIN command
      • Starts a separate window to run a specified program or command.
  • multiple hours for daily synchronization of backups
    • 0 8,12,22 * * * path/to/
      • deprecated for rsync
        • deprecated for rdiff-backup
      • implying that one has authenticated access to the server
      • see also Shell for the usage of 7z, also consider md5sum for checking
    • 0 0,8,12,19 * * * /home/fabien/bin/mirrors_rsync; ratpoison -c 'echo mirrorsrsync_done'
  • crontab -l : print the content of the current cron file
  • crontab -e : edit the current cron file
  • regularly saving my crontab file through crontab -l
    • possible to do diff on it
  • patterns
    • m h dom mon dow command
    • 15 * * * * command : command get executed every minute 15 of the hour

To do

From YetAnotherTutorial

  • this does that
  • this other command is nice


My notes on Tools gather what I know or want to know. Consequently they are not and will never be complete references. For this, official manuals and online communities provide much better answers.