Shell Programming and Scripting

I want to back up some of my system folders on a regular basis. Let's say some every day, but some other every week.
I kinda know how to get backup like this form:

Code:

tar cjf archive-$(date +%Y%m%d).tbz2 / -N ./archive-$(date -d yesterday +%Y%m%d)

But, I DONT KNOW how to add this files to the crontab file as a command, so that it will get execute according to the min, hour, day .. that we set.

Moreover, I would thank if you also mention some command to remove the backed up data from time to time, let's say those which are 3 months old shall get deleted,

tnx

Check this: https://www.unix.com/answers-frequent...n-crontab.html

Or you can use this script:

ISPConfig 3 - back-res a Backup and Restore script - HowtoForge Forums | HowtoForge - Linux Howtos and Tutorials

Can be run from cron like:

Code:

# Back up my system and data
1 0 * * *      /etc/rc.d/back-res 1>/dev/null 2>/dev/nul

l