Bash

DNS is something so fundamental to most of our systems functioning that it’s often overlooked in initial troubleshooting, it’s also incredibly hard to troubleshoot if it’s only intermittently failing.

Doing local development on a bunch of interconnected services I often want to start multiple long running server processes.

This is the basic script I use for that.

Many of my scripts work with temporary files, usually relative to the scripts directory¹, while at the same time using set -e to exit as soon as something fails.

In this scenario the script leaves behind these temporary files by default, which is not desireable.

We can however do a proper cleanup using the trap concept.

On Linux/Unix/MacOS:

find . | grep " "

On Windows:

Get-ChildItem -Path "." -Recurse -Filter "* *" | Format-Table FullName

Often times we need the current date (and time) when scripting inside bash or other shells. For example when creating a backup file or writing to a log.

Often times when writing scripts I want to reference files in the same directory, but keep the script portable in case it is part of a git repository being checked out somewhere else or just the folder getting moved.

Copy & paste from untrusted sources on the internet into the terminal is a really bad idea! Early in my career I did it too and still often see others doing it.