I think you should install package linux-generic-hwe-16.04 to have further kernel updates if you upgrade system by e.g. sudo apt-get update; sudo apt-get dist-upgrade, but I am not familiar with mintUpdate. Anyway, installing it helps linux-purge to work with --keep.
I think you should install package linux-generic- hwe-16. 04 to have further kernel updates if you upgrade system by e.g. sudo apt-get update; sudo apt-get dist-upgrade, but I am not familiar with mintUpdate. Anyway, installing it helps linux-purge to work with --keep.
The broken pipe issue seems to have disappeared.