I newly installed linux mint 18 and connected to internet through ethernet and manual proxy of organization, same proxy IP address for HTTP, HTTPS, FTP and Socks Host and same port number 8080 for all.I have an active Internet connection now. I can surf and download things from browser. But the problem is that when I try to install any things, error messages are coming on both software manager and terminal. I tried adding namespace 8.8.8.8 to /etc/resolv.cng, but not fruitful. Is it issue with port number assignment or any other?ERROR INFORMATION :When I type apt-get install vim with sudo permission, I am getting the following after pressing YDo you want to continue? [Y/n] YIgn:1 http://archive.ubuntu.com/ubuntu xenial/main i386 vim-runtime all   2:7.4.1689-3ubuntu1Err:2 http://archive.ubuntu.com/ubuntu xenial/main amd64 vim amd64 2:7.4.1689-3ubuntu1Temporary failure resolving 'archive.ubuntu.com'Err:1 http://archive.ubuntu.com/ubuntu xenial/main i386 vim-runtime all 2:7.4.1689-3ubuntu1Temporary failure resolving 'archive.ubuntu.com'E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/v/vim  /vim-runtime_7.4.1689-3ubuntu1_all.deb  Temporary failure resolving 'archive.ubuntu.com'E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/v/vim/vim_7.4.1689-3ubuntu1_amd64.deb  Temporary failure resolving 'archive.ubuntu.com'E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?When I try the same using software manager, the error is as followsThe package 'vim' could not be installedPlease check your connection to the Internet
Problem in installing new software
linux mint;software installation