Q. How do I list all installed kernel on Linux operating system? How do I find out current kernel version?
A. You can use standard package listing command to list installed kernels.
RedHat / CentOS / RHEL / Fedora Linux user
You need to use standard rpm command to list installed software. Type the following command at shell prompt:
$ rpm -qa kernel
Output:
kernel-2.6.18-4.1.15.el5 kernel-2.6.18-8.1.14.el5 kernel-2.6.18-8.1.10.el5
To list / display current kernel
Type the following command:
$ uname -r
$ uname -mrs
Output:
Linux 2.6.18-8.1.14.el5 x86_64
Debian / Ubuntu Linux user
Use dpkg command to list all installed kernel, enter:
$ dpkg --list | grep linux-image
Output:
ii linux-image-2.6.20-15-generic 2.6.20-15.27 Linux kernel image for version 2.6.20 on x86/ ii linux-image-2.6.20-16-generic 2.6.20-16.32 Linux kernel image for version 2.6.20 on x86/ ii linux-image-generic 2.6.20.16.28.1 Generic Linux kernel image
This entry is 6 of 8 in the Linux/Unix Kernel Version Tutorial series. Keep reading the rest of the series:
- How To Find Out FreeBSD Version and Patch Level Number
- How To Find Which Linux Kernel Version Is Installed On My System
- Find Linux / UNIX Kernel Version Command
- How To Find Out If 32 or 64 bit Unix OS Installed On Server
- Linux: Find If Processor (CPU) is 64 bit / 32 bit [long mode ~ lm]
- List or Check Installed Linux Kernels
- Find Linux Kernel Version Command
- Linux Command: Show Linux Version
10 comment
thanks ! important information.
hi,
it’s working thanks for information
Regards
krishan kumar singh
hey that works for Ubuntu…!
Hi,
how to edit the boot order manually in Debian to choose a specific installed kernel to be the default one?
Thanks.
You need to modify the bootloader configuration. If you haven’t been playing with your installation you’re using GRUB, so search for GRUB configuration tutorials.
yes,
I just want to know the grub.cnfg path to edit it in Debian.
hi, i am new to linux. i want to know what happens to the older kernel when i install a new kernel? does it overwrite? also explain me how do i find the path/location for both older and newer kernels! please help!
@rohit, newer installed kernels do not overwrite existing kernels unless you delete them explicitly. So you can always choose to boot with the proved old one :-)
As for the kernels location, it depends on where do you install them… In my case I always create a /boot partition, so there you could find all those kernels…
Best of luck!
What if you have manually compiled and installed kernels that aren’t in the package manager?
Thanks for posting this! Helpful