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How to find which kernel version is installed on my Linux system


Q. I am a new proud Linux user. My question to you is - how do I find which kernel version installed on my Linux system? How do I upgrade my kernel to latest version? Any help would be greatly appreciated.
A. The Linux kernel is the central component of most computer operating systems (OSs). Its responsibilities include managing the system's resources and the communication between hardware and software components.
You need to use uname command to print certain system information including kernel name. Type the following command to print kernel version number:
$ uname -r
Output:
2.6.20-15-generic
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