> For the complete documentation index, see [llms.txt](https://bananapi.gitbook.io/bpi-m2-ultra-open-source-single-board-computer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bananapi.gitbook.io/bpi-m2-ultra-open-source-single-board-computer/bpi-m2ultrasourcecodeongithub/bpi-berrybpi-ultra-how-to-alter-ubootkernel-from-github.md).
# BPI-Berry/BPI-Ultra How to alter Uboot、Kernel from github
**Banana Pi BPI-M2 Ultra / BPI-M2 Berry How to alter Uboot、Kernel**
**1,Click** [**http://www.banana-pi.org/download.html**](http://www.banana-pi.org/download.html)**, download relatively BPI-M2 Ultra Image ；and burn images to SD card.**
**2,Install tool-chain**
`sudo apt-get install build-essential libncurses5-dev u-boot-tools qemu-user-static debootstrap git binfmt-support libusb-1.0-0-dev pkg-config gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf gcc-arm-linux-gnueabi g++-arm-linux-gnueabi libssl-dev`
**3,Install BPI-Tools ,to BPI-GitHub** [**https://github.com/BPI-SINOVOIP/bpi-tools**](https://github.com/BPI-SINOVOIP/bpi-tools)
`git clone https://github.com/BPI-SINOVOIP/BPI-M2U-bsp.git`
**4，Put Download done BPI-Tools copy to under /usr/bin**
`sudo cp -a bpi-* /usr/bin/`
Execute bpi-tools -u order，install successfully after appear belows screen
Go to BPI-GitHub \
，note: BPI-M2 berry and BPI-M2 Ultra use the same code.
Grab BPI-M2Ultra-bsp Source Code; execute grabing source code order
`git clone https://github.com/BPI-SINOVOIP/BPI-M2U-bsp.git`
switch to BPI-M2U-bsp category after carried out，execute ./build.sh order
Can see BPI-M2 Ultra/BPI-M2 Berry configuration,choose BPI-M2U’s resolution what you wanted.:default compile 720P：
Choose mode what you need compile (advise choose 1 option first time compile)
**5，Compile done can seen under generate new SD folder BPI-M2U-bsp**
Later Enter into SD folder seen below files
These files represent information one by one
100MB --> BPI-M2Ultra uboot relative file
BPI-BOOT-bpi-m2u.tgz --> BPI-M2Ultra uEnv.txt & uImage relative file
3.10.65-BPI-M2U-Kernel.tgz --> BPI-M2Ultra kernel relative file
**6,Use command to see the SD card current position.**
`sudo fdisk -l`
This example can be seen SD Card’s position in /dev/sdb
Can be seen BPI-M2Ultra system has two partition,one FAT32 partition,another one EXT4 partition,represent gradually.
**7，Change BPI-M2Ultra Uboot ，switch to /SD/100MB category；execute bpi-bootsel order:**
`sudo bpi-bootsel `
**8， Change BPI-M2Ultra uImage ,switch to /SD/ category；carry out relative command.**
```
sudo tar –xvf -C
```
Belowinformation after execute，successfully done.
**9， Change BPI-M2Ultra Kernel，switch to /SD/ category；execute relative order**
`sudo tar -xvf -C `
**Supplement**
Change kernel setting，switch to / linux-sunxi category，execute order
`make ARCH=arm menuconfig`
