As I have a small HDD, I regularly check spare capacity and clean apt and logs.
I just keep the current and previous kernels. For me that is 6.8.0-60, 6.8.0-59.
Looking at Disk Analyser, I see 6.8-57 linux headers is still in scr despite using:
sudo apt clean
sudo apt-get autoremove
That shows nothing to be removed.
Same using Ubuntu Cleaner. 6.8.0-57 is not listed.
Also running:
ls -l /boot
only shows the 2 kernels I expect to see. i.e. 6.8.0-57 not shown.
However: Using Nautilus, I find the stray 6.8.0-57 headers in /src
Question: Can I simply delete that folder without any issues, or does it require other persuasion to do that properly?
Maybe I can seek and destroy by using Synaptic Package Manager?