Welcome and don’t worry. We all have to start somewhere.
Normally in Debian you need to be root to install something. Open a console and type su and then the root password. You can then use
Code:
apt-get install <packagename>
or alternatively you can use
You may find aptitude easier if you’re just starting out.
You can take the approach of using sudo. However you’ll need to install sudo first (the irony) and then set it up to allow a user to run apt-get. This is how it tends to work in Ubuntu. The only difference is that Ubuntu has this set up out of the box and Debian doesn’t. Personally, I prefer to do installs as root only.
For security updates you need to make sure that the file /etc/apt/sources.list contains reference to security updates.
As a normal user type
Code:
cat /etc/apt/sources/list
The output should contain something like the following;
In your case it may say stable rather than etch. If there’s no mention of security then use su to change to root and edit the file to include these lines. From now on whenever you update you’ll get the security updates as well.
Hope that helps