Remove file, folder and lock of folder using linux command

Title : Remove file, folder and lock of folder using linux command

How to remove all files from a folder(folder name=eclipse) ?

sudo rm -rf eclipse/*

How to remove a folder (folder name = eclipse)?

sudo rm -rf eclipse

Install Java update version from this page.

http://openjdk.java.net/install/

Uninstall Java from ubuntu

http://akbarahmed.com/2012/06/24/uninstall-java-from-ubuntu-linux/

Install eclipse

http://akovid.blogspot.com/2012/08/installing-eclipse-juno-42-in-ubuntu.html

For removing lock of a folder or file access(I want to access all files from the folder named by .ssh)

sudo chmod -R 777 /home/pdm-rizvi/.ssh/