There seems to be a lot of kernels installed:
root@v59530:/boot# dpkg -l | grep "linux-[a-z]*-"
ii linux-aws-headers-4.15.0-1007 4.15.0-1007.7 all Header files related to Linux kernel version 4.15.0
...
ii linux-aws-headers-4.15.0-1032 4.15.0-1032.34 all Header files related to Linux kernel version 4.15.0
ii linux-aws-headers-4.15.0-1033 4.15.0-1033.35 all Header files related to Linux kernel version 4.15.0
ii linux-azure-headers-4.15.0-1009 4.15.0-1009.9 all Header files related to Linux kernel version 4.15.0
...
ii linux-azure-headers-4.15.0-1032 4.15.0-1032.33 all Header files related to Linux kernel version 4.15.0
ii linux-gcp-headers-4.15.0-1006 4.15.0-1006.6 amd64 Header files related to Linux kernel version 4.15.0
...
ii linux-gcp-headers-4.15.0-1032 4.15.0-1032.34 amd64 Header files related to Linux kernel version 4.15.0
ii linux-gcp-headers-4.15.0-1033 4.15.0-1033.35 amd64 Header files related to Linux kernel version 4.15.0
ii linux-gke-4.15-headers-4.15.0-1030 4.15.0-1030.32 amd64 Header files related to Linux kernel version 4.15.0
ii linux-gke-4.15-headers-4.15.0-1032 4.15.0-1032.34 amd64 Header files related to Linux kernel version 4.15.0
ii linux-gke-4.15-headers-4.15.0-1033 4.15.0-1033.35 amd64 Header files related to Linux kernel version 4.15.0
ii linux-headers-4.15.0-1004-oem 4.15.0-1004.5 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1005-dell300x 4.15.0-1005.8 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1006-dell300x 4.15.0-1006.10 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
...
ii linux-headers-4.15.0-1030-kvm 4.15.0-1030.30 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1030-oem 4.15.0-1030.35 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1030-oracle 4.15.0-1030.33 amd64 Oracle Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1031-aws 4.15.0-1031.33 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1031-azure 4.15.0-1031.32 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1031-kvm 4.15.0-1031.31 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1031-oracle 4.15.0-1031.34 amd64 Oracle Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1032-aws 4.15.0-1032.34 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1032-azure 4.15.0-1032.33 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1032-gcp 4.15.0-1032.34 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1032-gke 4.15.0-1032.34 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1032-kvm 4.15.0-1032.32 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1033-aws 4.15.0-1033.35 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1033-gcp 4.15.0-1033.35 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1033-gke 4.15.0-1033.35 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-headers-4.15.0-1033-oem 4.15.0-1033.38 amd64 Linux kernel headers for version 4.15.0 on 64 bit x86 SMP
ii linux-kvm-headers-4.15.0-1008 4.15.0-1008.8 all Header files related to Linux kernel version 4.15.0
...
ii linux-kvm-headers-4.15.0-1031 4.15.0-1031.31 all Header files related to Linux kernel version 4.15.0
ii linux-kvm-headers-4.15.0-1032 4.15.0-1032.32 all Header files related to Linux kernel version 4.15.0
ii linux-libc-dev:amd64 4.15.0-135.139 amd64 Linux Kernel Headers for development
ii linux-oem-headers-4.15.0-1004 4.15.0-1004.5 all Header files related to Linux kernel version 4.15.0
...
ii linux-oem-headers-4.15.0-1033 4.15.0-1033.38 all Header files related to Linux kernel version 4.15.0
ii linux-oracle-headers-4.15.0-1007 4.15.0-1007.9 all Header files related to Oracle Linux kernel version 4.15.0
ii linux-oracle-headers-4.15.0-1008 4.15.0-1008.10 all Header files related to Oracle Linux kernel version 4.15.0
...
ii linux-oracle-headers-4.15.0-1033 4.15.0-1033.36 all Header files related to Oracle Linux kernel version 4.15.0
I could not get informed about the current used one:
picture: trying to get kernel info using uname
root@v59530:/boot# uname -r
4.15.0
root@v59530:/boot# uname -v # ???
#1 SMP Thu Apr 22 16:18:59 MSK 2021
root@v59530:/boot# uname -m
x86_64
root@v59530:/boot# uname -a
Linux v59530.1blu.de 4.15.0 #1 SMP Thu Apr 22 16:18:59 MSK 2021 x86_64 x86_64 x86_64 GNU/Linux
root@v59530:/boot# cat /proc/version
Linux version 4.15.0 ([email protected]) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) ) #1 SMP Thu Apr 22 16:18:59 MSK 2021
root@v59530:/boot# hostnamectl | grep Kernel
Kernel: Linux 4.15.0
root@v59530:/boot# cd /etc/default/grub
-bash: cd: /etc/default/grub: No such file or directory
root@v59530:/boot# uname -mrs
Linux 4.15.0 x86_64
root@v59530:/boot# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.5 LTS"
root@v59530:/boot# cat /etc/issue
Ubuntu 18.04.5 LTS \n \l
Links that I used during my research:
Expected behavior according to cyberciti.biz:
So my Linux kernel version is 4.15.0-39, where:
4 : Kernel version
15 : Major revision
0 : Minor revision
39 : Patch level or number
generic : Linux distro/kernel specific additional info
