使用fastboot烧写映像时，出现如下错误信息：
jjj@ubuntu-server:~/s5pv210/android_gingerbread_v10/android/out/release$ fastboot flash system system.img
< waiting for device >
或是
jjj@ubuntu-server:/etc/udev/rules.d$ fastboot devices
no permissions fastboot
解决方法：
在/etc/udev/rules.d目录下新建51-android.rules文件，内容如下：
######################################################
# Project: http://code.google.com/p/51-android/ #
# File: /etc/udev/rules.d/51-android.rules #
# Author: http://www.9tripod.com #
# Date: 2012.08.28 #
######################################################
# adb protocol on passion (Nexus One)
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4e12", MODE="0666", OWNER="jianjunjian"
# fastboot protocol on passion (Nexus One)
SUBSYSTEM=="usb", ATTR{idVendor}=="0bb4", ATTR{idProduct}=="0fff", MODE="0666", OWNER="jianjunjian"
# adb protocol on crespo/crespo4g (Nexus S)
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4e22", MODE="0666", OWNER="jianjunjian"
# fastboot protocol on crespo/crespo4g (Nexus S)
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4e20", MODE="0666", OWNER="jianjunjian"
# adb protocol on stingray/wingray (Xoom)
SUBSYSTEM=="usb", ATTR{idVendor}=="22b8", ATTR{idProduct}=="70a9", MODE="0666", OWNER="jianjunjian"
# fastboot protocol on stingray/wingray (Xoom)
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="708c", MODE="0666", OWNER="jianjunjian"
# adb protocol on maguro/toro (Galaxy Nexus)
SUBSYSTEM=="usb", ATTR{idVendor}=="04e8", ATTR{idProduct}=="6860", MODE="0666", OWNER="jianjunjian"
# fastboot protocol on maguro/toro (Galaxy Nexus)
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4e30", MODE="0666", OWNER="jianjunjian"
# adb protocol on panda (PandaBoard)
SUBSYSTEM=="usb", ATTR{idVendor}=="0451", ATTR{idProduct}=="d101", MODE="0666", OWNER="jianjunjian"
# fastboot protocol on panda (PandaBoard)
SUBSYSTEM=="usb", ATTR{idVendor}=="0451", ATTR{idProduct}=="d022", MODE="0666", OWNER="jianjunjian"
# usbboot protocol on panda (PandaBoard)
SUBSYSTEM=="usb", ATTR{idVendor}=="0451", ATTR{idProduct}=="d010", MODE="0666", OWNER="jianjunjian"
# fastboot protocol on x210
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="0002", MODE="0666", OWNER="jianjunjian"
然后将OWNER里面替换为自己的计算机用户名，保存退出。
使用如下指令重启udev:
sudo service udev restart
再次使用fastboot下载即可。
也可以到这里下载51-android.rules文件：