centos7升级到vim8

    1. wget -P /etc/yum.repos.d/  https://copr.fedorainfracloud.org/coprs/lbiaggi/vim80-ligatures/repo/epel-7/lbiaggi-vim80-ligatures-epel-7.repo
    2. yum -y remove vim-minimal vim-common vim-enhanced sudo
    3. yum  install vim-enhanced sudo -y