Adds helper script for netplan configuration swapping

master0Fnone_classes/2_Sandbox_in_a_Box/toggle_netplan.sh

@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+#
+# Author: jeFF0Falltrades
+#
+# toggle_netplan.sh automates the process of swapping the netplan configuration
+# of our "Sandbox in a Box" Remnux machine so that you can swap between the
+# configuration used to run upgrades/updates, and the configuration used to
+# route the machine for use in the internal (virtual) network.
+#
+# REMEMBER: Run this as sudo, and remember to switch your VM network as well
+#
+# MIT License
+#
+# Copyright (c) 2024 Jeff Archer
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+if [ "$EUID" -ne 0 ]; then
+  echo "This script must be run as root."
+  exit 1
+fi
+
+NETPLAN_CONFIG="/etc/netplan/01-netcfg.yaml"
+
+enable_internet=$(cat <<'EOF'
+# This file describes the network interfaces available on your system
+# For more information, see netplan(5).
+network:
+  version: 2
+  renderer: networkd
+  ethernets:
+    enp0s17:
+        dhcp4: yes
+        nameservers:
+            addresses: [8.8.8.8]
+EOF
+)
+
+disable_internet=$(cat <<'EOF'
+# This file describes the network interfaces available on your system
+# For more information, see netplan(5).
+network:
+  version: 2
+  renderer: networkd
+  ethernets:
+    enp0s17:
+        dhcp4: no
+        addresses: [10.10.10.3/29]
+        gateway4: 10.10.10.3
+EOF
+)
+
+if grep -q "dhcp4: yes" "/etc/netplan/01-netcfg.yaml"; then
+    echo "$disable_internet" > "$NETPLAN_CONFIG"
+    echo "Swapped to internal network configuration"
+else
+    echo "$enable_internet" > "$NETPLAN_CONFIG"
+    echo "Swapped to NAT configuration"
+fi
+
+netplan apply