Unix Installation

Epsilon includes a version for Linux and a separate version for FreeBSD. We describe them (and the macOS version) collectively as the "Unix" version of Epsilon. The Linux version is available in .rpm and .deb formats, while the FreeBSD version is provided in .tar.bz2 format.

Fedora, Red Hat, and CentOS Linux

To install on Fedora, Red Hat, CentOS, and other Linux distributions that use .rpm files, double-click the .rpm file. Or install manually by using one of these commands:

sudo dnf localinstall ./path/to/filename.rpm (for newer systems)
sudo yum localinstall ./path/to/filename.rpm
sudo rpm -i ./path/to/filename.rpm (for older systems)

You can also install the .rpm version without sudo access. Type rpm2cpio filename.rpm | cpio -idmv to extract Epsilon's directory hierarchy into the current directory, then create ~/bin if necessary and run opt/epsilon15b1/esetup. This will not install any dependencies.

Debian and Ubuntu Linux

To install on Debian, Ubuntu, and other Linux distributions that use .deb files, double-click the .deb file (if your system is configured to permit this), or install manually by using one of these commands:

sudo gdebi filename.deb (for newer systems)
sudo apt install ./path/to/filename.deb
sudo dpkg -i filename.deb

If dpkg complains of missing dependencies, run sudo apt-get -f install.

You can also install the .deb version without sudo access. Type dpkg -x filename.deb dirname to extract Epsilon's directory hierarchy into the specified directory, then create ~/bin if necessary and run opt/epsilon15b1/esetup. This will not install any dependencies. (Use dpkg-deb -f filename.deb depends to list the packages Epsilon needs, dpkg -l packagename to see if each is installed.)

FreeBSD

To install on FreeBSD, as root, execute these commands:

cd /opt (or /usr/local)
tar xjf filename-bsd.tar.bz2
./epsilon15b1/esetup

The setup script will offer to install required packages, if necessary.

After Installing

Epsilon runs as an X11 program when run under the X11 windowing system (we refer to this as the GUI version), and as a terminal program outside of X11 (the "terminal version"). Epsilon uses X11 when it inherits a DISPLAY environment variable, or you use a -display flag to make Epsilon connect to a specific X server. You can force Epsilon to run as a terminal-style text-based program by providing a -vt flag or by running the program tepsilon instead of epsilon.

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