[Q] Eclipse Android SDK manager topic

I am using Ubuntu 14.04, I am trying to install the tools, rather update them but everytime I am getting an error like this one, please help!
I am very new to eclipse!

"URL not found: /ANDROID/sdk/temp/platform-tools_r20-linux.zip (Permission denied)
Downloading Glass Development Kit Preview, Android API 19, revision 11
URL not found: /ANDROID/sdk/temp/google-gdk.zip (Permission denied)
Skipping 'Android SDK Tools, revision 24.0.2'; it depends on 'Android SDK Platform-tools, revision 20' which was not installed.
Done. Nothing was installed."