Post Install Configuration

Objective:

The objective of this lab is to bring the system up-to-date and install a few packages. Also understand transient and persistent settings.

What to do

Ubuntu

Become root.
```
sudo -i
```
Next install packages after you bring the system to get packages from the newly added repo sources.
```
apt update
apt upgrade
apt install build-essential curl dkms dnsutils tree vim vim-gtk3
```

Debian

Become root.
```
su -
```

Check the settings of /etc/apt/sources.list

Make a backup of /etc/apt/sources.list first.

cp /etc/apt/sources.list /etc/apt/sources.list.original

Delete the two lines containing the word cdrom.
Add contrib non-free to the list of packages

So your /etc/apt/sources.list should look like this:

deb http://deb.debian.org/debian/ bookworm main contrib non-free
deb-src http://deb.debian.org/debian/ bookworm main contrib non-free

deb http://deb.debian.org/debian/ bookworm-updates main contrib non-free
deb-src http://deb.debian.org/debian/ bookworm-updates main contrib non-free

deb http://security.debian.org/debian-security bookworm-security main contrib non-free
deb-src http://security.debian.org/debian-security bookworm-security main contrib non-free

Next install packages after you bring the system to get packages from the newly added repo sources.

apt update
apt upgrade
apt install build-essential curl dkms dnsutils openconnect resolvconf tree vim vim-gtk3

Challenge

Install the VirtualBox Guest additions. Reboot. Next, share a folder with your host operating system (Windows/macOS). Reboot and confirm that the shared folder is accessible to both Linux and Windows. Confirmation means creating a file in Linux and then being able to view the contents of that file on Windows.