General :: Script To Tar Up Files When A Partition Hits A Certain Use Percentage

I am in need to create a script that queries how large a partition is and when it hits a certain percentage (say 90%) it will execute another script that tars up certain files (or they could just be part of the same script). I would create a cronjob that runs this script once a day.

I have the script that tars up the files I need, sets permissions, etc. (btw, the files in question are audit logs). I just need the part that runs something like a df -h and takes the use percentage of the /var partition in that query and if that percentage is greater than/ equal to 90%, it kicks off the tar script.

Here is a sniplet of the df -h with just the /var partition shown:

Quote:

So, when the cronjob sees that the Use% is >= 90%, it would kick off the tar script...if not above 90%, it closes.