add exist git repo up to github

Take uboot_savage_mx6 as example.

1. git remote add pb https://github.com/allencyhsu/uboot_savage_mx6.git

2. git remote -v

origin  git://git.freescale.com/imx/uboot-imx.git (fetch)

origin  git://git.freescale.com/imx/uboot-imx.git (push)

pb  https://github.com/allencyhsu/uboot_savage_mx6.git (fetch)

pb  https://github.com/allencyhsu/uboot_savage_mx6.git (push)

3. git push pb savage-jb

   answer the id & pass question.

4. wait couple minutes to complete upload.

5. go to github to check the code uploaded.

Add a project on exist AOSP repository

Add a project on exist AOSP repository (ex: realtek android driver)

• Make a git repository & add/commit files

    cd /hardware/realtek/wlan
    git init
    git add *
    git commit -m "1st release" -a

• Create .repo/projects

    cd .git
    mkdir -p ../../../../.repo/projects/hardware/realtek/wlan.git
    cp -a * ../../../../.repo/projects/hardware/realtek/wlan.git/

• Remove local git files & make link to .repo/projects

    rm -rf branches/ config description hooks/ info/ logs/ objects/ refs/
    ln -s ../../../../.repo/projects/hardware/realtek/wlan.git/branches .
    ln -s ../../../../.repo/projects/hardware/realtek/wlan.git/config .
    ln -s ../../../../.repo/projects/hardware/realtek/wlan.git/description .
    ln -s ../../../../.repo/projects/hardware/realtek/wlan.git/hooks .
    ln -s ../../../../.repo/projects/hardware/realtek/wlan.git/info .
    ln -s ../../../../.repo/projects/hardware/realtek/wlan.git/logs .
    ln -s ../../../../.repo/projects/hardware/realtek/wlan.git/objects .
    ln -s ../../../../.repo/projects/hardware/realtek/wlan.git/refs .

• Edit project.list and manifest.xml

    vi .repo/project.list
- add
 hardware/realtek/wlan
    vi .repo/manifest.xml 
- add
         

Ubuntu pptp server

1. install pptpd service
sudo apt-get install pptpd

2. iptables rules
-A INPUT -i xyz0 -p tcp -m state --state NEW --dport 1723 -j ACCEPT

-A INPUT -i xyz0 -p gre -j ACCEPT
-A OUTPUT -i xyz0 -p gre -j ACCEPT
-A INPUT -i xyz0 -p tcp --sport 1723 -s xxx.xxx.xxx.xxx -j ACCEPT
-A OUTPUT -i xyz0 -p tcp --dport 1723 -d xxx.xxx.xxx.xxx -j ACCEPT

xyz0 is the out interface.
xxx.xxx.xxx.xxx is the pptp server address

3. /etc/pptpd.conf
modify localip & remoteip

localip xxx.xxx.xxx.xxx
remoteip 192.168.x.51-59

xxx.xxx.xxx.xxx is the pptp server address

4. /etc/ppp/chap-secrets

add one entry for pptpd

# client server secret IP addresses

"user" pptpd "password" *

5. start pptpd service

Use tmpfs in Ubuntu to speed up

Why? Sometime, you will use USB stick to boot up to another testing Ubuntu distribution, but the USB stick as main disk is really slow. So, I choose to use Linux tmpfs to avoid un-necessary access.

/etc/fstab
tmpfs           /tmp            tmpfs   defaults,noatime,mode=1777      0       0

tmpfs           /var/spool      tmpfs   defaults,noatime,mode=1777      0       0
tmpfs           /var/tmp        tmpfs   defaults,noatime,mode=1777      0       0

Install Android JB build environment on Ubuntu precise x64

Install Oracle JDK :

go to "https://raw.github.com/flexiondotorg/oab-java6/" get oab-java.sh

chmod +x oab-java.sh

sudo ./oab-java.sh

after oab-jave.sh finished.

sudo apt-get install sun-java6-jdk

sudo update-alternatives --config java

choose "java-6-sun"

Install Android build necessary package Ubuntu 12.04 x64:

sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl libc6-dev libncurses5-dev:i386 x11proto-core-dev libx11-dev:i386 libreadline6-dev:i386 libgl1-mesa-glx:i386  libgl1-mesa-dev g++-multilib mingw32 openjdk-6-jdk tofrodos  python-markdown libxml2-utils xsltproc zlib1g-dev:i386 uboot-mkimage

sudo ln -s /usr/lib/i386-linux-gnu/mesa/libGL.so.1 /usr/lib/i386-linux-gnu/libGL.so