Thanks I have downloaded the package from here: https://mirrors.slackware.com/slackware/slackware64-current/slackware64/n/      and installed. Once package is installed reapplied snmp plugin now works fine thanks for the suggestion. I had to make changes to snmp.plg file for it to work on reboot version changed to 5.8 and the pkghost and md5 needed to be changed.   <!DOCTYPE PLUGIN [ <!ENTITY name        "snmp"> <!ENTITY author      "coppit"> &l