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I use it to sync my portage tree. Logroller uses it for me. I also plan on using it to run "updatedb" on a regular basis, but I haven't got to it yet. There are a lot of other things you can do with it I have no need for as of right now. On the same hand though there a lot of things I can do with it I just don't right now.
Currently, I have cron jobs set up to update the locate database and do log rotation (these were already set up in Slack, I just had to change the settings so they'd run at a more convenient time). I'll set one up for removing temp files, too.
I wrote a little script which copies the /root/.bash_history file to a backup location and append the date to the filename. I also insert date into the .bash_history file so I know what day commands were run. This comes in handy at times.
I run the script once a day via cron.
I also use cron to run a script to check for disk space availability. (df -h) And it emails me if the output of the df is over 75%.
I also insert date into the .bash_history file so I know what day commands were run. This comes in handy at times.
Hmm, you might want to check out the HISTTIMEFORMAT environment variable. I use zsh myself so I don't know if that's what you're looking for. From bash man page:
If this variable is set and not null, its value is used as a format string for strftime(3) to print the time stamp associated with each history entry displayed by the history builtin. If this variable is set, time stamps are written to the history file so they may be preserved across shell sessions.
I'm currently using crontab to record TV (dvb) because I can't be arsed to install MythTV/etc, I just wrote a couple of wrapper scripts around mencoder.