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                  Debian+ packages from IEM by IEM
	- Import the gpg-key from the Debian keyring server
sudo mkdir -p /usr/local/share/keyrings
gpg --keyserver keyring.debian.org --recv-keys 7405E745574809734800156DB65019C47F7A36F8
gpg --armor --export 7405E745574809734800156DB65019C47F7A36F8 | sudo tee /usr/local/share/keyrings/iem-archive-keyring.asc
 
- To refresh the gpg-key from the Debian keyring server, simply repeat the Import step.
- Add the repository
 The repository is only available via https, so you might need to enable https-support for apt:
 sudo aptitude install apt-transport-https
 The following line adds the iem-repository to your apt-sources:
  echo "deb [signed-by=/usr/local/share/keyrings/iem-archive-keyring.asc] https://apt.iem.at/debian iem main" | sudo tee /etc/apt/sources.list.d/iem-archive.list
 
- Finally run:
 sudo aptitude update
 
- Add the non-free repository
 There are also some non-free and contrib packages available.
Due to legal restrictions, all non-free can only be installed using a password.
The following lines add the non-free/contrib archives of the iem-repository to your apt-sources
(replace USERNAME and PASSWORD with valid values):
  sudo mkdir -p /etc/apt/auth.conf.d/
  echo "deb [signed-by=/usr/local/share/keyrings/iem-archive-keyring.asc] https://apt.iem.at/debian iem main contrib non-free" | sudo tee /etc/apt/sources.list.d/iem-archive.list
  echo "machine apt.iem.at login USERNAME password PASSWORD" | sudo tee /etc/apt/auth.conf.d/iem-archive.conf
 
Apache/2.4.65 (Debian) Server at apt.iem.at Port 443