+# Set up screen.
+apt-get -y install screen
+
+# Set up ping.
+apt-get -y install iputils-ping
+
+# Set up irssi.
+apt-get -y install irssi
+cat > /etc/systemd/system/irssi.service << EOF
+[Unit]
+Description=irssi screen
+
+[Service]
+Type=forking
+User=plom
+ExecStart=/bin/sh /home/plom/config/other/screen-irssi.sh
+
+[Install]
+WantedBy=multi-user.target
+EOF
+systemctl enable /etc/systemd/system/irssi.service
+