The program 'curl' is currently not installed

http://askubuntu.com/questions/259681/the-program-curl-is-currently-not-installed

Error Information:

The program ‘curl’ is currently not installed. You can install it by typing:

sudo apt-get install curl

Method:

% sudo sed -i -e ‘s/us.archive.ubuntu.com/archive.ubuntu.com/g’ /etc/apt/sources.list

%sudo apt-get update

%sudo apt-get install curl

Not Succeed.

may because the packages for old releases have been moved to old-releases.ubuntu.com when they reached their end of official support from Canonical.need