"F-zip is a universal shell script designed to make recovery flashable zip files with a few simple steps“
Anyone (devs/newbies) who has something (boot.img/apps/libs/bootanimation/framework) to flash and do not want to do all the work to make a recovery zip manually
It will works on any Linux and Linux based operating systems including android. The Linux system might be native or with in a virtual box or even the bash inside Windows 10.