Android Eclipse on Ubuntu

1. download Eclipse 4.2.1 linux 64bit, and extract it
2. sudo apt-get install openjdk-6-jdk
3. run eclispe
4. goto Help -> Install New Software
5. add https://dl-ssl.google.com/android/eclipse/ and install
6. download android sdk
7. got an error -> adb: no such file
8. do "sudo apt-get install ia32-libs"