Cannot find module (IANAifType-MIB)

you can fix these errors:

Cannot find module (IANAifType-MIB): At line 13 in /usr/share/mibs/ietf/IF-MIB
Did not find 'IANAifType' in module #-1 (/usr/share/mibs/ietf/IF-MIB)
Cannot find module (IANA-RTPROTO-MIB): At line 14 in /usr/share/mibs/ietf/IP-FORWARD-MIB
Did not find 'IANAipRouteProtocol' in module #-1 (/usr/share/mibs/ietf/IP-FORWARD-MIB)
No log handling enabled - turning on stderr logging
MIB search path: /var/www/.snmp/mibs:/usr/share/mibs/site:/usr/share/snmp/mibs:/usr/share/mibs/iana:/usr/share/mibs/ietf:/usr/share/mibs/netsnmp
Cannot find module (IANAifType-MIB): At line 13 in /usr/share/mibs/ietf/IF-MIB
Did not find 'IANAifType' in module #-1 (/usr/share/mibs/ietf/IF-MIB)
Cannot find module (IANA-RTPROTO-MIB): At line 14 in /usr/share/mibs/ietf/IP-FORWARD-MIB
Did not find 'IANAipRouteProtocol' in module #-1 (/usr/share/mibs/ietf/IP-FORWARD-MIB)
No log handling enabled - turning on stderr logging

by running the following:

$ sudo apt-get install snmp-mibs-downloader

but most likely you had those installed, so just do this:

$ sudo download-mibs
$ sudo sed -i 's/^mibs/#mibs/g' /etc/snmp/snmp.conf