Prevent Exit When Receiving SIGPIPE with Pipefail Set

When a program that is part of a pipeline quits, it closes its stdin and stdout. Programs that produce the input for the quitted process may still try to write to its stdin. Since they cannot, they will receive a SIGPIPE from the kernel.

Create MacOS App Bundle from Script

I’m going to show how to create the smallest possible MacOS app bundle we can: one that simply executes a Bash script. Then, I’m going to expand a bit on that and add an icon to it. I’ll also show how open a Terminal app window so we can see the script’s output in it.

Make passmenu Show GUI Pinentry When Using Pinentry Curses by Default

Let’s take a look at how to use a GUI pinentry for one program, and curses for everything else.

Readline .inputrc Configuration Examples

These are some of my favorite readline tweaks.

Sudo With Examples

I’ve recently finished “Sudo Mastery” by Michael W. Lucas. He’s a great and fun author that writes both technical guides and novels. I bought his "$ git commit murder" some years ago and was sold.

This post is basically a write-down of what I learned about sudo from his book.

Read File into JSON List with jq

You have a file and you want to convert the contents into a JSON list. How can we leverage jq to do that?

Pipe to Multiple Commands with Bash

Sometimes it’s handy to filter the output of a command (with grep, for example) while still having the column names (the first line) available. How do we go about that?

Maven's Versions Plugin Updates All Your Dependencies With a Single Command

It’s a good habit to use the latest versions of the dependencies you use. Not only because the updated version might contain new features or better performance (one can hope), but also because bugs are fixed and security issues are tackled. If you go about it by hand, however, updating dependencies is a boring and tedious task. Luckily for us, there is the Maven versions plugin to help us.

Oracle Sqlplus in a Small Docker Container

When you only need Sql*Plus, it’s good to have a small Docker image that you can use. This post will look at how to create this Docker image.