E: Some index files failed to download. They have been ignored, or old ones used inst

[plymaker100]

I have installed Kubuntu 13.04
When I try to install any package using

sudo apt-get install <package-name>

I get this message :
E:Unable to locate package <package-name>

I tried to use

sudo apt-get update

But I get this output

[IMG][/IMG]

[QIII]

Hello!

13.04 has reached End of Life (EOL) and is no longer supported. The repositories have been moved, which explains your issue.

I recommend installing one of the currently supported releases: 12.04LTS (supported through April, 2017), 14.04LTS (supported through April, 2019), or 15.04 (supported for 9 months) You may install 14.10 if you wish, but it will reach EOL in July.

If you would please, rather than posting an image like this, please copy and past the results of terminal commands as text in code tags.

1. If you are using the "Reply to Thread" button - highlight text and use the # button in the text box header. Alternatively, click the # button first, place your cursor between the code tags and type or paste your text.

2. If using "Quick Reply" then type [code] at the beginning and [/code] at the end. The square brackets are required.