Create a snmpv3 user in net-snmp configuration file
net-snmp-create-v3-user [-ro] [-a authpass] [-x privpass] [-X DES|AES] [username]
The net-snmp-create-v3-user shell script is designed to create a new user in net-snmp configuration file (/var/net-snmp/snmpd.conf by default).
--version
displays the net-snmp version number
-ro
create an user with read-only permissions
-a authpass
specify authentication password
-x privpass
specify encryption password
-X DES|AES
specify encryption algorithm