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Debian / Ubuntu Server
apt-get install autoconf automake gawk g++ git-core libjpeg62-dev libncurses5-dev libtool make python-dev gawk pkg-config libtiff4-dev libperl-dev libgdbm-dev libdb-dev unixodbc

Source
cd /usr/src /usr/local/bin/git clone git://git.freeswitch.org/freeswitch.git freeswitch

boostrap.sh
cd /usr/src/freeswitch ./bootstrap.sh

modules.conf
cd /usr/src/freeswitch Enable or disable the modules in /usr/src/freeswitch/modules.conf

compile
./configure make make install