snmp v2c

snmp_v2c.txt

# ubuntu 24.04
sudo apt install snmpd

sudo vim /etc/snmp/snmpd.conf

#agentaddress  127.0.0.1,[::1]
rocommunity  public default #-V systemonly
rocommunity6 public default #-V systemonly

sudo vim /lib/systemd/system/snmpd.service

[Service]
Restart=always

sudo systemctl daemon-reload
sudo systemctl restart snmpd.service

# RHEL 8
sudo dnf install net-snmp
sudo firewall-cmd --zone=public --add-service snmp --permanent
sudo firewall-cmd --reload

sudo vim /etc/snmp/snmpd.conf
# Make at least  snmpwalk -v 1 localhost -c public system fast again.
#       name           incl/excl     subtree         mask(optional)
view    systemview    included   .1.3.6.1.2.1.1
view    systemview    included   .1.3.6.1.2.1.25.1.1
view all included .1

####
# Finally, grant the group read-only access to the systemview view.

#       group          context sec.model sec.level prefix read   write  notif
#access  notConfigGroup ""      any       noauth    exact  systemview none none
access  notConfigGroup ""      any       noauth    exact  all none none

sudo systemctl restart snmpd.service