Add install_snmp.sh

install_snmp.sh

@@ -0,0 +1,75 @@
+#!/bin/bash
+
+# ===== CONFIG =====
+COMMUNITY="PathCore"
+LOCATION="Server Room"
+CONTACT="sysadmin@pathcore.internal"
+ALLOWED_IP="10.10.0.36/32"   # CHANGE THIS for security
+# ==================
+
+set -e
+
+if [[ $EUID -ne 0 ]]; then
+  echo "Please run as root"
+  exit 1
+fi
+
+echo "Detecting OS..."
+
+if [ -f /etc/os-release ]; then
+  . /etc/os-release
+  OS_FAMILY=$ID
+else
+  echo "Cannot detect OS"
+  exit 1
+fi
+
+install_snmp_debian() {
+  apt update -y
+  apt install -y snmp snmpd
+}
+
+install_snmp_rhel() {
+  dnf install -y net-snmp net-snmp-utils
+}
+
+case "$OS_FAMILY" in
+  ubuntu|debian)
+    echo "Detected Debian-based OS"
+    install_snmp_debian
+    ;;
+  rhel|centos|rocky|almalinux|fedora)
+    echo "Detected RHEL-based OS"
+    install_snmp_rhel
+    ;;
+  *)
+    echo "Unsupported OS: $OS_FAMILY"
+    exit 1
+    ;;
+esac
+
+echo "Backing up SNMP config..."
+SNMP_CONF="/etc/snmp/snmpd.conf"
+cp $SNMP_CONF ${SNMP_CONF}.bak.$(date +%F-%T)
+
+echo "Configuring SNMP..."
+cat <<EOF > $SNMP_CONF
+agentAddress udp:161
+rocommunity $COMMUNITY $ALLOWED_IP
+
+sysLocation    $LOCATION
+sysContact     $CONTACT
+
+# Basic monitoring
+extend uptime /usr/bin/uptime
+extend df /bin/df -h
+EOF
+
+echo "Starting and enabling SNMP..."
+systemctl restart snmpd
+systemctl enable snmpd
+
+echo
+echo "SNMP setup complete ✅"
+echo "Test with:"
+echo "snmpwalk -v2c -c $COMMUNITY localhost system"