Code:
ken@ubuntu:~$ uname -a
Linux ubuntu 2.6.20-16-generic #2 SMP Thu Jun 7 20:19:32 UTC 2007 i686 GNU/Linux
ken@ubuntu:~$ uname -r
2.6.20-16-generic
ken@ubuntu:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 7.04
Release: 7.04
Codename: feisty
Not sure which one you want exactly, but there's the commands/outputs of all the commands I know that give out info about your distro and its kernel.
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