use Ubuntu Jaunty and Android ADB

# adb kill -server
# sudo adb start -server
# adb devices

Ubuntu Jaunty and Android ADB

android developers - Setting up a Device for Development

# vi /etc/udev/rules.d/51-android.rules.

For Gusty/Hardy, edit the file to read:
SUBSYSTEM=="usb", SYSFS{idVendor}=="0bb4", MODE="0666"

Android Developers Forum - Ubuntu Jaunty and adb not playing well together

pts.blog - How to fix the adb no permissions error on Ubuntu Lucid

Yi Yu - Fix “???????????? no permissions” with adb and your Android phone