How can you find out the Linux kernel version?

To determine the Linux kernel version, the command 'uname -r' is used. This command specifically returns the release version of the kernel currently running on the system. The 'uname' command, which stands for 'Unix Name,' provides various details about the system, and the '-r' option focuses solely on the kernel release information.

In practical terms, when you run 'uname -r' in the terminal, you will see the version number of the Linux kernel, which consists of significant components such as the major and minor version numbers along with additional identifiers (like patches or updates).

The other available options either do not provide the kernel version directly or are not valid commands. For instance, 'uname -v' outputs the version information for the kernel, but it does not give the same detailed versioning format as '-r', making 'uname -r' more specific and appropriate for checking the kernel version. The command 'version' is not a standard command in Linux, and 'kernel -v' is also not a recognized command, so they would not yield the expected results.