步骤一：修改 snmp 的配置文件
# vim /etc/snmp/snmpd.conf将以下内容：
......
group gpublic v1 upublic
group gpublic v2c upublic
......修改为：
......
# group gpublic v1 upublic
# group gpublic v2c upublic
......步骤二：让修改的内容生效
# systemctl restart snmpd# vim /etc/snmp/snmpd.conf将以下内容：
......
group gpublic v1 upublic
group gpublic v2c upublic
......修改为：
......
# group gpublic v1 upublic
# group gpublic v2c upublic
......# systemctl restart snmpd