Crontab {Tools}

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
  • http://www.softpanorama.org/Utilities/cron.shtml#Macros
  • see also http://www.softpanorama.org/Utilities/batch.shtml
• 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 cron.pl 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/getbackups_fabien.benetou.fr
    • 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

• tasks on my local machine
  • save configuration files
    • Vi, Vimperator, AutoHotKey, Crontab, Firefox bookmarks (for search keywords)
    • use Fossil (proper revision control system) rather than pscp + manual versionning
    • Keeping $HOME (or /etc) in Subversion by Scott Scriven, 2005
    • SVN vs. Mercurial vs. Git For Managing Your Home Directory by Josh Carter, multipart/mixed 2008
• download and refresh the background representing my wiki(s) structure and statistics
  • cf Processing or Graphviz

From YetAnotherTutorial

• this does that
• this other command is nice

Note

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.