pgmtofs
Convert a PGM image to Usenix FaceSaver format. See also:
fstopgm. More information: https://netpbm.sourceforge.net/doc/pgmtofs.html.
- Convert the specified PGM image to Usenix FaceSave format:
pgmtofs {{path/to/input.pgm}} > {{path/to/output.fs}}