This guide provides information and example terminal commands for Linux, relevant to users of OpenFOAM. Commands are written that refer to OpenFOAM, e.g. they include OpenFOAM Linux environment variables. Those commands that refer to OpenFOAM will only function as stated, if they are executed on a machine on which OpenFOAM is installed and the user’s environment variables are set up for OpenFOAM, e.g. as described in the source download page (see Setting Environment Variables).