I am on Ubuntu 20.04 and I trying to understand what's going on with my Linux kernels, and there is something that looks odd to me. The current kernel should be:
@precision-3551:~$ uname -r
5.13.0-44-generic
But I can also see that there are other installed kernels. One curious thing is that the installed kernels are either 5.13
or 5.4
, with nothing in between:
@precision-3551:~$ dpkg --list | egrep -i --color 'linux-image|linux-headers'
ii linux-headers-5.0.0-1034-oem-osp1 5.0.0-1034.39 amd64 Linux kernel headers for version 5.0.0 on 64 bit x86 SMP
ii linux-headers-5.13.0-41-generic 5.13.0-41.46~20.04.1 amd64 Linux kernel headers for version 5.13.0 on 64 bit x86 SMP
ii linux-headers-5.13.0-44-generic 5.13.0-44.49~20.04.1 amd64 Linux kernel headers for version 5.13.0 on 64 bit x86 SMP
ii linux-headers-5.4.0-113 5.4.0-113.127 all Header files related to Linux kernel version 5.4.0
ii linux-headers-5.4.0-113-generic 5.4.0-113.127 amd64 Linux kernel headers for version 5.4.0 on 64 bit x86 SMP
ii linux-headers-generic 5.4.0.113.117 amd64 Generic Linux kernel headers
ii linux-headers-generic-hwe-20.04 5.13.0.44.49~20.04.28 amd64 Generic Linux kernel headers
rc linux-image-5.0.0-1034-oem-osp1 5.0.0-1034.39 amd64 Signed kernel image oem-osp1
ii linux-image-5.13.0-41-generic 5.13.0-41.46~20.04.1 amd64 Signed kernel image generic
ii linux-image-5.13.0-44-generic 5.13.0-44.49~20.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-100-generic 5.4.0-100.113 amd64 Signed kernel image generic
rc linux-image-5.4.0-104-generic 5.4.0-104.118 amd64 Signed kernel image generic
rc linux-image-5.4.0-105-generic 5.4.0-105.119 amd64 Signed kernel image generic
rc linux-image-5.4.0-107-generic 5.4.0-107.121 amd64 Signed kernel image generic
rc linux-image-5.4.0-109-generic 5.4.0-109.123 amd64 Signed kernel image generic
rc linux-image-5.4.0-110-generic 5.4.0-110.124 amd64 Signed kernel image generic
ii linux-image-5.4.0-113-generic 5.4.0-113.127 amd64 Signed kernel image generic
rc linux-image-5.4.0-65-generic 5.4.0-65.73~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-66-generic 5.4.0-66.74~18.04.2 amd64 Signed kernel image generic
rc linux-image-5.4.0-70-generic 5.4.0-70.78~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-71-generic 5.4.0-71.79~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-72-generic 5.4.0-72.80~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-73-generic 5.4.0-73.82~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-74-generic 5.4.0-74.83~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-77-generic 5.4.0-77.86~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-80-generic 5.4.0-80.90~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-81-generic 5.4.0-81.91~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-84-generic 5.4.0-84.94~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-86-generic 5.4.0-86.97~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-87-generic 5.4.0-87.98~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-89-generic 5.4.0-89.100~18.04.1 amd64 Signed kernel image generic
rc linux-image-5.4.0-90-generic 5.4.0-90.101 amd64 Signed kernel image generic
rc linux-image-5.4.0-91-generic 5.4.0-91.102 amd64 Signed kernel image generic
rc linux-image-5.4.0-92-generic 5.4.0-92.103 amd64 Signed kernel image generic
rc linux-image-5.4.0-94-generic 5.4.0-94.106 amd64 Signed kernel image generic
rc linux-image-5.4.0-96-generic 5.4.0-96.109 amd64 Signed kernel image generic
rc linux-image-5.4.0-97-generic 5.4.0-97.110 amd64 Signed kernel image generic
rc linux-image-5.4.0-99-generic 5.4.0-99.112 amd64 Signed kernel image generic
ii linux-image-generic 5.4.0.113.117 amd64 Generic Linux kernel image
ii linux-image-generic-hwe-20.04 5.13.0.44.49~20.04.28 amd64 Generic Linux kernel image
ii linux-image-oem-osp1 5.4.0.113.117 amd64 Depends on the generic kernel image (dummy transitional package)
@precision-3551:~$ dpkg --list | grep -i -E --color 'linux-image|linux-kernel' | grep '^ii'
ii linux-image-5.13.0-41-generic 5.13.0-41.46~20.04.1 amd64 Signed kernel image generic
ii linux-image-5.13.0-44-generic 5.13.0-44.49~20.04.1 amd64 Signed kernel image generic
ii linux-image-5.4.0-113-generic 5.4.0-113.127 amd64 Signed kernel image generic
ii linux-image-generic 5.4.0.113.117 amd64 Generic Linux kernel image
ii linux-image-generic-hwe-20.04 5.13.0.44.49~20.04.28 amd64 Generic Linux kernel image
ii linux-image-oem-osp1
And when I try purge, I don't get any listed ones:
@precision-3551:~$ sudo apt --purge autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
I have also looked into /etc/apt/apt.conf.d/01autoremove-kernels
, as suggested by this answer, but that file does not exist in my case.
I think that by removing the 5.4
kernels I can save a bit of space. How can I do that or is there any signs I shouldn't?