This is my snmpd.conf

cat /etc/snmp/snmpd.conf

# Change RANDOMSTRINGGOESHERE to your preferred SNMP community string
com2sec readonly  default         RANDOMSTRINGGOESHERE 

group MyROGroup v2c        readonly
view all    included  .1                               80
access MyROGroup ""      any       noauth    exact  all    none   none

syslocation Rack, Room, Building, City, Country [Lat, Lon]
syscontact Your Name <your>

#OS Distribution Detection
extend distro /usr/bin/distro

-----------------------------------------------------------------------------------------------------------------
This /usr/bin/distro

#!/usr/bin/env sh
# Detects which OS and if it is Linux then it will detect which Linux Distribution.

OS=$(uname -s)
REV=$(uname -r)
#MACH=$(uname -m)

if [ "${OS}" = "SunOS" ] ; then
  OS=Solaris
  ARCH=$(uname -p)
  OSSTR="${OS} ${REV}(${ARCH} $(uname -v))"

elif [ "${OS}" = "AIX" ] ; then
  OSSTR="${OS} $(oslevel) ($(oslevel -r))"

elif [ "${OS}" = "Linux" ] ; then
  #KERNEL=$(uname -r)

  if [ -f /etc/fedora-release ]; then
    DIST=$(cat /etc/fedora-release | awk '{print $1}')
    REV=$(cat /etc/fedora-release | sed s/.*release\ // | sed s/\ .*//)

  elif [ -f /etc/redhat-release ] ; then
    DIST=$(cat /etc/redhat-release | awk '{print $1}')
    if [ "${DIST}" = "CentOS" ]; then
      DIST="CentOS"
      IGNORE_OS_RELEASE=1 # https://bugs.centos.org/view.php?id=8359
    elif [ "${DIST}" = "CloudLinux" ]; then
      DIST="CloudLinux"
    elif [ "${DIST}" = "Mandriva" ]; then
      DIST="Mandriva"
      #PSEUDONAME=$(cat /etc/mandriva-release | sed s/.*\(// | sed s/\)//)
      REV=$(cat /etc/mandriva-release | sed s/.*release\ // | sed s/\ .*//)
    elif [ -f /etc/oracle-release ]; then
      DIST="Oracle"
    elif [ -f /etc/rockstor-release ]; then
      DIST="Rockstor"
    else
      DIST="RedHat"
    fi

    #PSEUDONAME=$(cat /etc/redhat-release | sed s/.*\(// | sed s/\)//)
    REV=$(cat /etc/redhat-release | sed s/.*release\ // | sed s/\ .*//)

  elif [ -f /etc/mandrake-release ] ; then
    DIST='Mandrake'
    #PSEUDONAME=$(cat /etc/mandrake-release | sed s/.*\(// | sed s/\)//)
    REV=$(cat /etc/mandrake-release | sed s/.*release\ // | sed s/\ .*//)

  elif [ -f /etc/devuan_version ] ; then
    DIST="Devuan $(cat /etc/devuan_version)"
    REV=""

  elif [ -f /etc/debian_version ] ; then
    DIST="Debian $(cat /etc/debian_version)"
    REV=""
    IGNORE_OS_RELEASE=1
    if [ -f /usr/bin/lsb_release ] ; then
      ID=$(lsb_release -i | awk -F ':' '{print $2}' | sed 's/\s//g')
    fi
    if [ "${ID}" = "Raspbian" ] ; then
      DIST="Raspbian $(cat /etc/debian_version)"
    fi
    if [ -f /usr/bin/pveversion ]; then
      DIST="${DIST}/PVE $(/usr/bin/pveversion | cut -d '/' -f 2)"
    fi
    if [ -f /usr/bin/pmgversion ]; then
      # pmgversion requires root permissions to run, please add NOPASSWD setting to visudo.
      DIST="${DIST}/PMG $(sudo /usr/bin/pmgversion | cut -d '/' -f 2)"
    fi
    if [ -f /etc/dogtag ]; then
      DIST=$(cat /etc/dogtag)
    fi

  elif [ -f /etc/gentoo-release ] ; then
    DIST="Gentoo"
    REV=$(tr -d '[[:alpha:]]' </etc DIST="Arch Linux" REV="" IGNORE_LSB=1 DIST=$(head REV=$(sed PHOTON_BUILD_NUMBER=//p IGNORE_LSB=1 DIST="OpenWrt" REV=$(cat DIST=$(cat REV="" DIST=$(echo xss=removed REV=$(echo xss=removed DIST="dd-wrt" DIST="ASUSWRT-Merlin" REV=$(nvram xss=removed> /dev/null 2>&1
    fi
  fi

  # try standardized os version methods
  if [ -f /etc/os-release ] && [ "${IGNORE_OS_RELEASE}" != 1 ] ; then
    . /etc/os-release
    STD_DIST="$NAME"
    STD_REV="$VERSION_ID"
  elif [ -f /etc/lsb-release ] && [ "${IGNORE_LSB}" != 1 ] ; then
    STD_DIST=$(lsb_release -si)
    STD_REV=$(lsb_release -sr)
  fi
  if [ -n "${STD_DIST}" ]; then
    DIST="${STD_DIST}"
  fi
  if [ -n "${STD_REV}" ]; then
    REV="${STD_REV}"
  fi

  if [ -n "${REV}" ]; then
    OSSTR="${DIST} ${REV}"
  else
    OSSTR="${DIST}"
  fi

elif [ "${OS}" = "Darwin" ] ; then
  if [ -f /usr/bin/sw_vers ] ; then
    OSSTR=$(/usr/bin/sw_vers|grep -v Build|sed 's/^.*:.//'| tr "\n" ' ')
  fi

elif [ "${OS}" = "FreeBSD" ] ; then
  if [ -f /etc/version ] ; then
    DIST=$(cat /etc/version | cut -d'-' -f 1)
    if [ "${DIST}" = "FreeNAS" ]; then
      OSSTR=$(cat /etc/version | cut -d' ' -f 1)
    fi
  else
    OSSTR=$(/usr/bin/uname -mior)
  fi
fi

echo "${OSSTR}"