关闭防火墙和 SELinux
systemctl stop firewalld.service
systemctl disable firewalld.service
systemctl stop iptables.service
systemctl disable iptables.service
setenforce 0
将 /etc/selinux/config 文件中的 SELINUX=enforcing 修改为 SELINUX=disabled
加载开源镜像的 epel-release
yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
yum repolist
yum makecache
安装 Web 环境
yum install httpd php php-gd
安装 Nagios
yum install nagios nagios-plugins-all
设置 Nagios Web 页面访问密码
htpasswd -c /etc/nagios/passwd nagiosadmin
如果要使用 nrpe 进行通信，则安装 nrpe 及相关依赖
yum install nagios-plugins-nrpe nrpe
启动 Nagios
systemctl start nagios
启动 Web 服务
systemctl start httpd