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-# OpenIPC Wiki
-[Table of Content](../index.md)
-
-Goke SoC: Learning from original firmware
------------------------------------------
-
-### Prepare the enviroment
-
-Over the UART interface, it is possible to temporarily interrupt the normal booting
-sequence and drop into a limited Linux shell at early stage of system startup.
-```
-setenv bootargs ${bootargs} single init=/bin/sh
-boot
-```
-This shell won't load the full working system, so you have to amend it manually.
-First, mount `/rom` filesystem:
-```
-mount -t jffs2 /dev/mtdblock3 /rom
-```
-Mount the rest of mounting points from `/etc/fstab`:
-```
-mount -a
-```
-Also mount the SD card to copy files to and from:
-```
-mount /dev/mmcblk0p1 on /mnt/s0
-```
-
-### Modifying the system
-
-On `/rom` filesystem, you can edit the `/room/etc/passwd` file but once the
-device restarts it will be reset to default. This happens because there is a
-guide bin file recreating `passwd` file on each start, so we need to modify
-that executable.
-
-Copy `system.dat` to an SD card:
-```
-cp /rom/system.dat /mnt/s0
-```
-On a linux computer, unpack `system.dat` file using `unsquashfs`:
-```
-mkdir squashfs-temp
-cd squashfs-temp
-unsquashfs system.dat
-```
-Find guide file and edit its content in a hex-editor to modify the name of the
-file where password is written on every restart. Search for `/etc/passwd` and
-change a letter in its name to something different, like `/etc/passwT`.
-
-Pack the squash file system using `mksquashfs`:
-```
-mksquashfs ./squashfs-root ./file -comp xz -no-xattrs -noappend -no-exports -all-root -quiet -b 131072
-```
-and copy it from the SD card back to `/rom` directory on the camera.
-
-Now you can replace the password in `/rom/etc/passwd` with your own password, and when
-you restart the device, you will have full working system with your own password.