I hit this today. `df -h` confirmed my /boot was quite full (15MB left). Running `sudo purge-old-kernels` (from the bikeshed package) cleared out some things and brought the free space on /boot up to 93MB.
I hit this today. `df -h` confirmed my /boot was quite full (15MB left). Running `sudo purge-old-kernels` (from the bikeshed package) cleared out some things and brought the free space on /boot up to 93MB.