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Find what Linux kernel version you are running

To determine what version of the Linux kernel you are currently using, you can use the uname command as per the examples below.

$ uname -a

This will output the host name of the computer, Kernel version, and the CPU architecture.

Example output:

$ uname -a
Linux localhost.localdomain 2.6.32-279.19.1.el6.x86_64 #1 SMP Wed Dec 19 07:05:20 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

localhost.localdomain being the host name of the computer

2.6.32 being the kernel version (the rest relates specifically to distribution based kernel customizations)

x86_64 refers to it being a kernel supporting 64bit CPU architecture.

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