How to update WAZUH agent on Raspberry Pi's

Because the remote upgrade won't work from the WAZUH management console (because we explicitly disabled it from updating under normal apt updates) - 

sudo cat /etc/apt/sources.list.d/wazuh.list

#deb [signed-by=/usr/share/keyrings/wazuh.gpg] https://packages.wazuh.com/4.x/apt/ stable main

Uncomment that line, save, then run apt updates/upgrades.

 SNMP Monitoring of Linux Machines

Download and install SNMP -  

sudo apt update
sudo apt install snmpd snmp

Edit your SNMP configuration file - 

sudo nano /etc/snmp/snmpd.conf

Example - 

# SNMP community string and access settings
com2sec readonly  [IP Address of SNMP Poller] [insert clever string here]
group MyROGroup v2c readonly view all    included  .1      80
access MyROGroup ""      any   noauth    exact  all    none   none

# setup info
syslocation [Location string]
syscontact  Me <example@email.address>

# open up

agentAddress  udp:161

# run as

agentuser  root

# dont clog the local logs with "connection from UDP..." messages:

dontLogTCPWrappersConnects yes

# fix for disks larger then 2TB

realStorageUnits 0

#Distro Detection

extend distro /usr/bin/distro

Restart or start SNMPD and ensure that it's set to run at startup -

systemctl restart snmpd

systemctl enable snmpd