Cyrface can be installed from the Cytoscape App Manager:
Within Cytoscape click Apps -> App Manager and then search for Cyrface and then click install
Or by downloading manually Cyrface jar file and placing it within the installed Apps folder:
Move the Jar file into ‘~/CytoscapeConfiguration/3/apps/installed/’ folder and start Cytoscape.
IMPORTANT: On Ubuntu, before using Cyrface you need to type on Terminal:
sudo apt-get install libcairo2-dev sudo apt-get install libxt-dev