Net SNMP related commands

1. see snmp Version number

   snmpd --version

2. see snmpd Whether the service is on

   ps -aux | grep snmpd

3. snmp restart 、 stop it 、 state （ Restart yes ：restart, Stop is stop, The status is status）

   snmpd start

4. test snmp Is the installation successful

   snmptranslate -To|head -n3

5. see net-snmp Of mibs The default path to the file

   net-snmp-config --default-mibdirs

6. see net-snmp Of snmp.conf The default path for

   net-snmp-config --snmpconfpath

7. View the specified port

   netstat -a|grep 161

8. Open the specified port

   firewall-cmd --permanent --zone=public --add-port=161/udp

add to v3 user

1. close SNMP service

   sudo service snmpd stop # stop it snmpd service

2. sudo net-snmp-create-v3-user -ro -A au123456 -X pr123456 -a MD5 -x DES admin

explain ：
-ro Read only user , Users who need to read and write can do without -ro

-A  Representative authentication password  -a  For authentication 

-X  For encryption  -x  For encryption 

admin It's your v3 User name 

Currently in Linux Next , It can only be used directly when adding authenticated and encrypted users .
I tried to add authentication without encryption 、 Do not authenticate users who are not encrypted , Basically can't be used , Or report an error directly ： Unknown users ,
I'm still checking this problem , But it seems that there is little hope …