happened to me too. plenty of space left on /usr, but no inode left, ended up manually deleting some folders in /usr/src. I thought those are removed when I purge kernels using purge-old-kernels command.
happened to me too. plenty of space left on /usr, but no inode left, ended up manually deleting some folders in /usr/src. I thought those are removed when I purge kernels using purge-old-kernels command.