"min-free-space-size 500MB would be exceeded" error explained / solution

This error is usually triggered during app update or a new app installation from Software Manager and is usually caused by insufficient space within root(/) partition, mainly under /var location. 

To fix this, at least temporary, run these commands in Terminal:

• sudo apt-get autoclean
• sudo apt-get clean

Try updating the app/installing new app again.

NOTE: This may help temporary for smaller app(s), but will probably happen again and may not work at all if a bigger app is being installed/updated. To fix the issue permanently, a re-partitioning of the root(/) partition will be required with more space allocated to it (this can only be done via bootable LIVE environment utility (Utilities/Hard Disk Tools/Partition Tools)). This does require advanced knowledge and is a dangerous procedure as it is very easy to corrupt current Linux installation/permanently lose data.