I have a Linux Mint machine I am working on. I want to install Laravel on it.When I searched for this I got this command: curl -sS https://getcomposer.org/installer | php from https://getcomposer.org/download/ to put in terminal but it gives me this:The program 'php' is currently not installed. You can install it by typing:sudo apt-get install php5-cliThe program 'curl' is currently not installed. You can install it by typing:sudo apt-get install curlAfter that I have done sudo apt-get install curllibcurl3 curlInstall these packages without verification [y/N]? yErr http://archive.ubuntu.com/ubuntu/ quantal-updates/main libcurl3 i386 7.27.0-1ubuntu1.9  404  Not Found [IP: 91.189.91.15 80]Err http://security.ubuntu.com/ubuntu/ quantal-security/main libcurl3 i386 7.27.0-1ubuntu1.9  404  Not Found [IP: 91.189.91.14 80]Err http://security.ubuntu.com/ubuntu/ quantal-security/main curl i386 7.27.0-1ubuntu1.9  404  Not Found [IP: 91.189.91.14 80]Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/c/curl/libcurl3_7.27.0-1ubuntu1.9_i386.deb  404  Not Found [IP: 91.189.91.14 80]Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/c/curl/curl_7.27.0-1ubuntu1.9_i386.deb  404  Not Found [IP: 91.189.91.14 80]E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?got this which is not successfully installed curlHow can any one I successfully install these things and Composer and Laravel? 
Laravel , Composer and Curl installation on Linux Mint
linux;linux mint;curl
The version of Ubuntu you are using (Quantal, 12.10) is no longer supported since May 16th. So you can no longer download packages for it.You might be able to install curl and php from an installation DVD, or alternatively use wget to download the sources for both and compile them from source. I recommend however that you upgrade (or downgrade) to a supported Ubuntu version (14.04, 12.04) as you are missing security upgrades if you stay on 12.10