tar zxvf /home/<your-user-name>/Downloads/AndroidSDK.tgz
/home/<your-user-name>/Downloads/AndroidSDK/tools/android
chmod +x /home/<your-user-name>/Downloads/AndroidSDK/platform-tools/fastboot
gksudo gedit /etc/udev/rules.d/51-android.rules
SUBSYSTEM=="usb", SYSFS{idVendor}=="18d1", MODE="0666"
sudo restart udev
gedit .bashrc
#AndroidDev PATH
export PATH=${PATH}:/home/<your-user-name>/Downloads/AndroidSDK/tools:/home/<your-user-name>/Downloads/AndroidSDK/platform-tools
fastboot oem unlock
fastboot flash recovery /home/<your-user-name>/AndroidSDK/platform-tools/recovery-clockwork-herring.img
On Linux, edit your ~/.bash_profile or ~/.bashrc file. Look for a line that sets the PATH environment variable and add the full path to the tools/ and platform-tools directories to it. If you don't see a line setting the path, you can add one:
export PATH=${PATH}:/home/<your-user-name>/Downloads/AndroidSDK/tools:/home/<your-user-name>/Downloads/AndroidSDK/platform-tools