How to determine kernel/Xorg version numbers?
 

I'm a Ubuntu newbie. In many documentation I read, I see things like "If you have kernel version > x", "When you have Xorg/XFree version < y".
But I have no idea how to determine those version numbers! Commands like "ver" or "version" are not recognized.

Can someone please instruct me on how to determine these version numbers?

For the kernel, "uname -r" will tell you. For Xorg check /var/log/Xorg.0.log since it's printed when X starts. Since Ubuntu is Debian based, the package manager is dpkg. You can do "sudo dpkg -l" to see all the packaged software you have installed and its version.

uname -a for the kernel
X -version for xorg

'Xorg -version' for Xorg
'uname -a' fro the kernel

:)

Thanks for helping!!

For just the Xorg version, type

why did you post it here? (and even your solution is not correct, sudo must not be used)

When I run it without sudo, it says