I tried to install gcc compiler because I want to learn programming I have an old computer 1gb ram so I installed an older version of Ubuntu (10.04) and its working faster than before but when I try to install gcc package by writing

sudo apt-get install gcc 

but the following text appear :

Reading package lists... Done

Building dependency tree       

Reading state information... Done

E: Unable to locate package gcc

so I said maybe the problem is that my version of ubuntu is too old so I wrote in the terminal

sudo get-apt upgrade 

but this also appear to me

Reading package lists... Done

Building dependency tree       

Reading state information... Done

0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

and I tried also

sudo apt-get update 

but many lines appear and the last one was

E: Some index files failed to download, they have been ignored, or old ones used   instead 

and I noticed also that this version of Ubuntu don't have a graphical package manager so .