+# Set up mail system.
+su plom -c 'mkdir -p /home/plom/mail/'
+su plom -c 'mkdir -p /home/plom/mail/inbox/{cur,new,tmp}'
+su plom -c 'mkdir -p /home/plom/mail/new_inbox/{cur,new,tmp}'
+sed -i 's/^delete = true$/delete = false/g' /home/plom/config/dotfiles_user_server/getmail/getmailrc
+DEBIAN_FRONTEND=noninteractive apt-get -y install getmail4 procmail mutt postfix maildrop
+cp config/systemfiles/main.cf /etc/postfix/main.cf
+cp config/systemfiles/aliases /etc/aliases
+newaliases
+service postfix restart
+
+# Set up regular system update reminder.
+apt-get -y install cron
+su plom -c "echo '0 18 * * 0 ~/config/bin/simplemail.sh ~/config/mails/update_reminder' | crontab -"
+
+# Set up tmux.
+apt-get -y install tmux
+
+# Set up weechat, OTR, bitlbee.
+apt-get -y install weechat-plugins python-potr bitlbee
+cp config/systemfiles/weechat.service /etc/systemd/system/weechat.service
+systemctl enable /etc/systemd/system/weechat.service
+
+# 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
+#cp config/systemfiles/irssi.service /etc/systemd/system/irssi.service
+#systemctl enable /etc/systemd/system/irssi.service
+