Additionally installed software on original live stick

1. fdisk
2. pip
3. nfs-common
4. xorg
5. gedit

For PyQt5

1. qtbase5-dev
2. libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 libegl1-mesa

For APT proxy I created /etc/apt/apt.conf.d/95proxies and inserted

Acquire {
  HTTP::proxy "http://ubuntu-system-ip:3128";
  HTTPS::proxy "http://ubuntu-system-ip:3128";
}

For PIP proxy I created

sudo mkdir -p /etc/pip

then

vi /etc/pip/pip.conf

and inserted

[global]
proxy = http://ubuntu-system-ip:3128

For GIT I created and edited

vi /root/.gitconfig

I inserted

[alias]
	#some = !'/common/home/sd/klang/lnx/git-schulung/git-some/git-some'
	
	s    	= status
	ignored = !git ls-files -v|grep '^[[:lower:]]'

	# git commit.
	ci   = commit
	cim  = commit --message
	cima = commit --all --message

	# git log.
	ll   = log
	l    = log --oneline --max-count=15
	ld   = log --oneline --max-count=15 --decorate
	lp   = log --patch
	gl = log --oneline --decorate --all --graph
	#gl   = log --graph --oneline --decorate --branches --exclude=refs/stash --all
	# Mnemomic: who did what?
	wdw  = log --date=relative --pretty='format:%C(yellow)%h%Creset %C(bold blue)%an%Creset %C(bold green)%cr%Creset %s'
	hist = log --pretty=format:'%Cred%h%Creset %C(bold blue)<%an>%Creset%C(yellow)%d%Creset %Cgreen(%cr, %cd)%Creset%n%w(80, 8, 8)%s' --graph
	histfull = log --pretty=format:'%Cred%h%Creset %C(bold blue)<%an>%Creset%C(yellow)%d%Creset %Cgreen(%cr, %cd)%Creset%n%w(80, 8, 8)%s%n' --graph --name-status

[color]
	ui = auto

Matplotlib creates on first import a cache file for fonts. To make this persistant, the file was saved once and was copied to

/root/.cache/matplotlib/fontlist-v390.json