Change SNMP v2 community
1. Edit /etc/snmp/snmpd.conf as sudo. Change the term public to the desired community name.
2. rocommunity public default -V systemonly
rocommunity6 public default -V systemonly
rocommunity6 public default -V systemonly
3. Restart the SNMP daemon.
admin@livenx:~$ sudo systemctl restart snmpd