Termux is an Android terminal emulator and Linux environment app that works directly with no rooting or setup required. A minimal base system is installed automatically - additional packages are available using the APT package manager. Termux combines standard packages with accurate terminal emulation in a beautiful open-source solution. Access API endpoints with curl and use rsync to store backups of your contact list on a remote server.
This is a drop-installable Subversion server. It consists of a GUI application that contains a complete Apache 2 server plus the mod_dav_subversion plugin and takes care of everything from installation to setup to administration of a SVN server.