If you want to know which version of Debian or Ubuntu you are running, you can always check the /etc/apt/sources.list there you will see the version you are running but a better way is to run this on a terminal:

lsb_release -a 

The output in my Debian Box is:

Distributor ID: Debian
Description: Debian GNU/Linux 5.0 (lenny)
Release: 5.0
Codename: lenny

You can also run this in a Debian Linux.

cat /etc/debian_version 

In my Debian box this is the output:

5.0

I do not have an Ubuntu machine now, but I can remember that if you run this on an Ubuntu Linux, you will get

sid

For the output, as Ubuntu is based on Debian sid.

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Which Debian or Ubuntu are you using?

It is as easy as, run this on a terminal window.

sudo update-alternatives –config editor 

The options in my Debian system are:

There are 6 alternatives which provide `editor’.

Selection Alternative
———————————————–
1 /bin/ed
2 /bin/nano
3 /usr/bin/vim.tiny
*+ 4 /usr/bin/vim.gnome
5 /usr/bin/mcedit-debian
6 /usr/bin/emacs21

Press enter to keep the default[*], or type selection number:

The + sign denotes the default option, and the * sign denotes the actual selection, to change from vim to nano, just press 2 in this example and the ENTER.

Now all applications that uses an editor will use the new default one.

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Post from: MyComputerAid.com Computer support

How to change your default editor -Debian/Ubuntu-