I keep getting low disc space on /boot. It is less than 500 Mb in size. Is there a way I can resize and expand it? I have over 200 Gb free on root.
After removing old kernels, you need to do some purging to get it all nice and clean.
This will show you, which kernel packages have been removed:
dpkg --list | grep "^rc linux-image" | cut -d " " -f 3
Now you purge them one by one with:
sudo apt-get purge PACKAGE
That's all related to kernels in Linux Mint. After-removal procedure you might call it.