.option('-r, --rampath [path]', 'The path of the ram disk, default /home/$USER/ramdisk')
.option('-p, --persistent [path]', 'The path of the ram persistent, default /home/$USER/ramdisk-persistent')
.option('-g, --gid [group]', 'The gid, it you omit it is the current user')
.option('-t, --timer [minutes]', 'The timer in minutes, minimum about 10 minutes, Default is 20 minutes, the best')