[OpenWrt Wiki] Filesystems
openwrt.org › docs › techrefImplementation in OpenWrt. The flash.layout article documents how OpenWrt uses both SquashFS and JFFS2 filesystems combined into one filesystem by overlayfs. The kernel is also stored separately from these partitions in raw flash. When the kernel is built, it is also compressed with LZMA and gzip, as documented in imagebuilder .
[OpenWrt Wiki] The OpenWrt Flash Layout
openwrt.org › docs › techrefThe OpenWrt Flash Layout The embedded devices (routers and such) OpenWrt/LEDE (Linux Embedded Development Environment) has mainly targeted since its inception, use flash memory as the form of non-volatile memory for the persistent storage of the firmware and its configuration.
SDK
https://we.riseup.net › wikisopenwrt-x86-64-rootfs-ext4.img.gz, ext4 filesystem image (compressed) of openwrt root filesystem, same contents as above. openwrt-x86-64-combined-ext4.img.
[OpenWrt Wiki] Image formats
openwrt.org › docs › techrefuImage. This is an image format designed for U-Boot loader, generally consisting of a kernel with a header for information. Often a zImage with a 64 byte uImage header, which contains the load address & entry point of the zImage, so that uBoot knows what to do with it.
[OpenWrt Wiki] OpenWrt on x86 hardware (PC / VM / server)
openwrt.org › docs › guide-user# mount rootfs partition, in this example it's on sdd2 mkdir / mnt / rootfs mount-v / dev / sdd2 / mnt / rootfs cd / mnt / rootfs # delete all files on the partition rm-Rf * # copy rootfs.tar.gz here then uncompress it tar-xvzf openwrt-19.07.8-x86-64-generic-rootfs.tar.gz # wait for uncompress then delete the file rm openwrt-19.07.8-x86-64-generic-rootfs.tar.gz