Fix our repository setup and install tree
diff --git a/ubuntu-16.04/scripts/base.sh b/ubuntu-16.04/scripts/base.sh
index 5c4c20d..764943f 100644
--- a/ubuntu-16.04/scripts/base.sh
+++ b/ubuntu-16.04/scripts/base.sh
@@ -23,7 +23,7 @@
 apt-get autoremove --purge
 
 # Useful tools
-apt-get -y install curl wget tmux vim-nox byobu iputils-ping traceroute htop
+apt-get -y install curl wget tmux vim-nox byobu iputils-ping traceroute htop tree
 
 # Tmux fixes
 cat << 'EOF' >> /etc/tmux.conf