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Create a folder somewhere, whatever you prefer, but I would recommend to keep all the code in the same place. For example create one in you home directory
mkdir -p ~/code/x2go && cd ~/code/x2go
First, you have to get the sources. There is already a “ready to clone” snippet here, to be pasted in any bash terminal.
You should now have cloned all repositories actually shown at the gitweb here.
Then you should use your favorite available packet manager to install the build dependencies although I'm not 100% sure wether we need all of them or some are optional…
sudo apt-get install build-essential qt4-designer qtcreator \ qtcreator-doc qt4-demos qt4-doc qt4-dev-tools libqt4-dev \ git qt-sdk libldap2-dev libssh-dev libxpm-dev libcups2-dev \ debhelper doxygen man2html-base