Error during installation

[SHINYFATHIMA]

When i am trying to install rar using the command

sudo apt-get install unrar

i am getting the below error . PLease help me to resolve this issue.

After this operation, 258kB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
unrar
Install these packages without verification [y/N]? y
Err http://us.archive.ubuntu.com/ubuntu/ maverick/multiverse unrar i386 1:3.9.10-1
404 Not Found [IP: 91.189.91.13 80]
Failed to fetch http://us.archive.ubuntu.com/ubuntu/....10-1_i386.deb 404 Not Found [IP: 91.189.91.13 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

[deadflowr]

You'll have to update your repos. Maverick is dead.

If you feel the need not to upgrade to a supported version of Ubuntu use the method suggested here:

http://superuser.com/questions/33953...buntu-versions