sudo apt-get install curl
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  libcurl3
The following NEW packages will be installed:
  curl libcurl3
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 379 kB of archives.
After this operation, 900 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Err http://security.ubuntu.com/ubuntu/ precise-security/main libcurl3 i386 7.22.0-3ubuntu4.7
  404  Not Found [IP: 91.189.91.26 80]
Err http://archive.ubuntu.com/ubuntu/ precise-updates/main libcurl3 i386 7.22.0-3ubuntu4.7
  404  Not Found [IP: 91.189.88.149 80]
Err http://archive.ubuntu.com/ubuntu/ precise-updates/main curl i386 7.22.0-3ubuntu4.7
  404  Not Found [IP: 91.189.88.149 80]
Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/c/curl/libcurl3_7.22.0-3ubuntu4.7_i386.deb  404  Not Found [IP: 91.189.88.149 80]
Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/c/curl/curl_7.22.0-3ubuntu4.7_i386.deb  404  Not Found [IP: 91.189.88.149 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?