Create ipGet2.sh

Short bash script to get all IPs and interface names

Author: djsubstance

ipGet2.sh

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+# Filename: ipGet2.sh
+# OS's Supported - Most flavors of RedHat/Ubuntu as well verified on Darwin/OSX
+# Outcome: uses a combo of piping thru awk and grep to identify
+#  a) All interface names
+#  b) IP address of each
+
+#!/bin/bash
+OS=$(uname -s)
+
+# For macOS/Darwin
+if [ "$OS" = "Darwin" ]; then
+  
+    interfaces=($(ifconfig | grep '^[a-z]' | awk '{print $1}' | tr -d ':'))
+
+    for intf in "${interfaces[@]}"; do
+        ip_and_mask=$(ifconfig $intf | grep 'inet ' | awk '{print $2, $4}')
+        echo "$intf: $ip_and_mask"
+
+    done
+elif [ "$OS" = "Linux" ]; then
+    # Linux commands
+    interfaces=($(ip -o link show | awk -F': ' '{print $2}' | tr -d '@'))
+    for intf in "${interfaces[@]}"; do
+        ip_and_mask=$(ip -o -f inet addr show $intf | awk '{print $4}')
+        echo "$intf: $ip_and_mask"
+    done
+else
+    echo "Unsupported operating system."
+fi
+--- 
+Ubuntu Example Output:
+
+bash$ ./ipGet2.sh
+ lo: 127.0.0.1/8
+ eth0: 104.x.x.135/20
+ eth1: 10.108.0.2/20
+ docker0: 172.17.0.1/16
+ tun0: 10.8.4.14/24
+
+
+Darwin Example Output:
+bash$ ./ipGet2.sh 
+lo0: 127.0.0.1 0xff000000
+gif0: 
+stf0: 
+en6: 
+ap1: 
+en0: 192.168.1.103 0xffffff00
+awdl0: 
+llw0: 
+en3: 
+en2: 
+en4: 
+en1: 
+bridge0: 
+utun0: 
+utun1: 
+utun2: 
+utun3: 
+utun4: 10.8.4.2 10.8.4.1
+
+- As you can see making this work in Mac was a PIA but it works ;)
+
+
+
+
+
+Verfied on Darwin (GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin23))
+Verified on Ubuntu 22 (GNU bash, version 5.2.15(1)-release (x86_64-pc-linux-gnu))
+