Ssh

A few weeks ago I shelved my “homemade Bitwarden” and moved to 1Password on the family plan. Yes, you have to pay, but sharing with the family and the ease of use make up for it. Shortly after migrating the passwords I ran into the Developer tab and its SSH agent: private keys live in the vault, they sync themselves across my machines, and every use is authorized with a fingerprint or with Windows Hello. By the way, I later found out that Bitwarden has had an SSH agent too since early 2025. You learn something new every day. It sounded too good to be true, so I set out to check whether it fit my case: several workstations (macOS, Windows, Linux), lots of servers, network gear with SSH from another era, and more and more scripts and AI agents running ssh without me being at the keyboard. In this post I go through what I learned, how I set it up, and where I do NOT use it. …

When working in software development, one of the most subtle yet crucial aspects you need to be aware of is the difference between line endings in text files between Windows (CRLF \r\n) and Linux/MacOS (LF \n). This small detail can cause big problems if not handled correctly, especially when working in mixed environments – version control conflicts, script incompatibilities, compilation or execution issues. I wrote this post to have a handy reference for dealing with this topic, including a few tricks. …

This post will walk you through the process of setting up and using multiple accounts with one or more Git providers (GitHub, GitLab, Gitea). I describe the two options I recommend: HTTPS + Git Credential Manager and SSH multi-account. The first, HTTPS + Git Credential Manager, is the one I use most, because it’s compatible with CLI and/or GUI tools like Visual Studio, VSCode, Git Desktop, Gitkraken, etc. The second option, SSH multi-account, I delegate to “headless” machines, servers I connect to remotely via CLI or VSCode remote that need to clone repositories and work on them. …

Systemd is a system used in Linux to manage boot and system processes. Its “units” are configuration files that describe the processes and services that systemd manages. One of these units is systemd.socket, which starts the corresponding daemon when a connection is established through a socket with the machine. A socket is a form of communication between processes over a network or within the system. By creating a unit of this type, we ask it to listen on a specific socket and start a specific service when a connection is received. …

This post contains my GIT cheat sheet, various reminders I use as a programmer — common commands or situations. It comes in handy for example when I accidentally delete a file and want to recover it, check a previous version of code, or ignore a modification in a specific file. …

The goal is to make X11 (X-Window) applications work “also” from root. Making them work from a regular user is straightforward, but then switching to root with su/sudo and having X11 work is not allowed in Linux. The X11 connection only belongs to the user you logged in with via SSH. …