mirror of
https://github.com/Brandon-Rozek/website.git
synced 2024-12-24 05:44:28 +00:00
28 lines
723 B
Markdown
28 lines
723 B
Markdown
---
|
|
title: "Quick Bash: Validate IP Address"
|
|
date: 2020-12-19T20:15:24-05:00
|
|
draft: false
|
|
tags: ["Bash", "Networking"]
|
|
medium_enabled: true
|
|
---
|
|
|
|
`ipcalc` is a terminal tool that lets you validate an IP address. This proves useful to me as I have scripts that automate certain remote tasks given an IP address. Instead of trusting that an argument passed is a valid IP, why not check it?
|
|
|
|
First the script would need to check if `ipcalc` exists.
|
|
|
|
```bash
|
|
if ! command -v ipcalc > /dev/null ; then
|
|
echo "ipcalc not found. Exiting..."
|
|
exit 1
|
|
fi
|
|
```
|
|
|
|
Now for this example, we'll validate an IP address stored in the variable `$IP`.
|
|
|
|
```bash
|
|
if ! ipcalc -cs "$IP" ; then
|
|
echo "Invalid IP Address"
|
|
exit 1
|
|
fi
|
|
```
|
|
|