$ sudo apt-get remove --purge libreoffice*
$ sudo apt-get clean
$ sudo apt-get autoremove

Move the tmp directory to a ram disk, if you have sufficient memory. Add the following line to /etc/fstab:

tmpfs /tmp tmpfs noatime,nosuid 0 0

To activate the fstab changes, you need to run:

update-initramfs -u -k all

Changing network cards or the motherboard requires to update the MAC adresses:

vim /etc/udev/rules.d/70-persistent-net-rules

check credentials in fstab and move it to a credentials file

• Establish SSH access to all VMs as user and as root, follow SSH Client and Server
• Make sure that all machines names of the VMs get resolved properly (see DHCP Server - dnsmasq)
• Add aliases to ~/.bashrc to access the VMs by name (e.g. alias apollo='ssh -p 22 apollo')

# apt-get install vim
# apt-get install iotop
# apt-get install rsync
# /etc/lightdm/lightdm.conf: autologin-user=bco