Install the following package dependencies first (Debian/Ubuntu based distros):
sudo apt-get install build-essential libc6-dev \
qt4-dev-tools libqt4-dev libqt4-network git \
libqt4-svg libqtcore4 libqtgui4 \
libldap2-dev libssh-dev libxpm-dev libcups2-dev \
libgcc1 libldap-2.4-2 libssh-4 libstdc++6 libx11-dev
Note: Try to use at least libssh >= v0.4.7.
Note #2: Recommended package on the client-side: pulseaudio
Run the following commands as a regular, non-root user. You'll need the root password to install them.
You can either install it directly via the package manager, like when using APT:
apt install nxproxy
OR
Install nxproxy from source:
$ mkdir ~/x2go && cd ~/x2go $ git clone git://code.x2go.org/nx-libs.git $ cd nx-libs/nxproxy $ autoconf $ ./configure --prefix=/usr $ make -j 4 $ sudo make install
$ git clone git://code.x2go.org/x2goclient $ cd x2goclient $ export PREFIX=/usr $ make -j 4 $ sudo make install_client