# mpirun > Execute serial and parallel jobs in Open MPI. > See also: `mpic++`. > More information: . - Execute an Open MPI program: `mpirun {{path/to/executable}}` - Execute an Open MPI program with `n` parallel processes: `mpirun -n {{n}} {{path/to/executable}}` - Allow more processes than available physical cores: `mpirun -oversubscribe {{path/to/executable}}`