From mangos

Change directories as appropriate. Current install assumes same use of directories as the install guide.

OS Updates:

sudo apt-get update
sudo apt-get upgrade

Update mangos source

cd mangos
git pull
cd /src/bindings/ScriptDev2
svn up

Compile

autoreconf --install --force
cd objdir

Configure

../configure --prefix=/opt/mangos --sysconfdir=/opt/mangos/etc --datadir=/opt/mangos

The long part

sudo make -j [#ofCores]
sudo make install

DONT FORGET TO UPDATE YOUR DATABASES. Theres another post about that.