This question already has an answer here:
After doing "sudo apt-get update" which executed successfully, I tried to install eclipse using "sudo apt-get install eclipse". but it is showing "E: Unable to locate package eclipse".
Output for "lsb_release -a; apt-cache policy eclipse-platform" is
No LSB modules are available.
Description: Ubuntu 12.04.2 LTS
N: Unable to locate package eclipse-platform
Please help me ...Thanks in advance