ubuntu: what version is installed?

The quick way is to run “lsb_release -a”

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 9.10
Release:        9.10
Codename:       karmic

Or just read the info from /etc/lsb-release

$ cat /etc/lsb-release

It is also possible to check the file “/etc/issue”

$ cat /etc/issue
Ubuntu 9.10 \n \l

From X check out System->about.

Memtest86+ in grub

Turns out using Debian it is very simple to get memtest86+ to appear in the grub boot up menu.

Simply install it as usual using apt-get.

After the installation is complete do a grub-install.

That’s it, after rebooting memtest86+ is now in the grub menu.

(Now how come it was not possible to google out  this info;) )