net-snmp安装，通过镜像找到安装包安装
rpm -ivh net-snmp-libs-5.5-49.el6.x86_64.rpm
rpm -ivh net-snmp-perl-5.5-49.el6.x86_64.rpm
rpm -ivh net-snmp-utils-5.5-49.el6.x86_64.rpm
rpm -ivh net-snmp-5.5-49.el6.x86_64.rpm
修改配置文件vim /etc/snmp/snmpd.conf
启动服务service snmpd start
停止服务service snmpd stop
查看服务状态service snmpd status
关闭防火墙service iptables stop
验证是否安装成功snmpget -v 2c -c public 127.0.0.1 sysName.0
查看161端口是否开启 netstat -an |grep 161
