whats version in uname

Shell Programming and Scripting
1

uname -a
Linux DEVDB01 2.6.18-92.el5 #1 SMP Tue Apr 29 13:16:15 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux

please tell me whats version of linux and other details

2

Use uname -r instrad of uname -a

3

[root@~]# uname -r
2.6.18-92.el5

its version is 2.6 or 6.2 please tell ?