Use a Factory image to flash a router with OpenWrt for the col1
time. You normally do this via the web interface of the original
firmware.
Use a Sysupgrade image to update a router that already runs
OpenWrt. The image can be used with the LuCI web interface or the
terminal.
Linux kernel as a separate image.Linux kernel with basic file system. Used for first installation
or recovery.Root file system as a separate image.Image that is meant to be flashed on an SD-Card.Image that can be applied using the TFTP meachnism of the
bootloaderImage of unknown purpose.