upgrade 8.04 to 13.04

[Noah]

Hi there

I am not a master at migrating ubuntu.  I am attempting to go from 8.04 
to 13.04 and i am remote to the server.

Getting 404 to some of the links.

I am following these directions:

https://help.ubuntu.com/community/LucidUpgrades#Network_Upgrade_for_Ubuntu_Servers_.28Recommended.29


Here are the errors:

--- snip ---


$ sudo apt-get install update-manager-core
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
   update-manager-core
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 45.9kB of archives.
After this operation, 2892kB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
   update-manager-core
Install these packages without verification [y/N]? y
Err http://archive.ubuntu.com hardy-updates/main update-manager-core 
1:0.87.33
   404 Not Found [IP: 91.189.91.13 80]
Err http://security.ubuntu.com hardy-security/main update-manager-core 
1:0.87.33
   404 Not Found [IP: 91.189.92.202 80]
Failed to fetch 
http://security.ubuntu.com/ubuntu/pool/main/u/update-manager/update-manager-core_0.87.33_amd64.deb 
  404 Not Found [IP: 91.189.92.202 80]
E: Unable to fetch some archives, maybe run apt-get update or try with 
--fix-missing?