系统更新 yum update -y CentOS6和Centos7都要安装的企业运维常用基础工具包 yum install tree nmap dos2unix lrzsz nc lsof wget tcpdump htop iftop iotop sysstat nethogs -Y Centos7要安装的企业运维常用基础工具包 yum install psmisc net-tools bash-completion vim-enhanced -y