ubuntu server старые ядра

есть 2 сервера с убунтой 16.04
на обоих запускаю apt autoremove
на одном ядра старые удаляются а на другом нет
удалил вручную и вот что получил

ncdu /usr/src/

105.6 MiB [##########] /linux-headers-4.4.0-98
105.6 MiB [######### ] /linux-headers-4.4.0-101
105.6 MiB [######### ] /linux-headers-4.4.0-96
105.4 MiB [######### ] /linux-headers-4.4.0-93
105.4 MiB [######### ] /linux-headers-4.4.0-89
105.4 MiB [######### ] /linux-headers-4.4.0-87
105.4 MiB [######### ] /linux-headers-4.4.0-91
105.4 MiB [######### ] /linux-headers-4.4.0-79
105.4 MiB [######### ] /linux-headers-4.4.0-92
105.4 MiB [######### ] /linux-headers-4.4.0-81
14.9 MiB [# ] /linux-headers-4.4.0-101-generic
14.9 MiB [# ] /linux-headers-4.4.0-98-generic
14.9 MiB [# ] /linux-headers-4.4.0-96-generic
14.8 MiB [# ] /linux-headers-4.4.0-93-generic
14.8 MiB [# ] /linux-headers-4.4.0-81-generic
14.8 MiB [# ] /linux-headers-4.4.0-92-generic
14.8 MiB [# ] /linux-headers-4.4.0-89-generic
14.8 MiB [# ] /linux-headers-4.4.0-91-generic
14.8 MiB [# ] /linux-headers-4.4.0-87-generic
14.8 MiB [# ] /linux-headers-4.4.0-79-generic


dpkg --list|grep linux-image
ii linux-image-4.4.0-101-generic 4.4.0-101.124 amd64 Linux kernel image for version 4.4.0 on 64 bit x86 SMP
rc linux-image-4.4.0-97-generic 4.4.0-97.120 amd64 Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii linux-image-4.4.0-98-generic 4.4.0-98.121 amd64 Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii linux-image-virtual 4.4.0.101.106 amd64 This package will always depend on the latest minimal generic kernel image.