pgmtofs
converts PGM images to Usenix FaceSaver format, used for storing face images
TLDR
Convert PGM to Usenix FaceSaver format
$ pgmtofs [input.pgm] > [output.fs]
SYNOPSIS
pgmtofs [file]
DESCRIPTION
pgmtofs converts PGM images to Usenix FaceSaver format, used for storing face images for email and news systems. Part of Netpbm toolkit.
INSTALL
sudo apt install netpbm
sudo dnf install netpbm
sudo pacman -S netpbm
sudo apk add netpbm
sudo zypper install netpbm
brew install netpbm
nix profile install nixpkgs#netpbm