Linux Fixes

Linux Fixes | Adhen Prasetiyo

How to Fix Docker Container That Won't Start or Keeps Exiting — Read the Exit Code First

Your Docker container starts and immediately exits, or it won't start at all. Before you search for random solutions, check the exit code — it tells you exactly what went wrong. Exit 0 means the container finished normally. Exit 1 means the app inside crashed. Exit 137 means Linux killed it because it ran out of memory

Mar 12, 2026

Linux Fixes | Adhen Prasetiyo

How to Fix MySQL "Connection Refused" Error on Linux — 5 Checkpoints That Solve Every Case

MySQL throws "Connection refused" or "Can't connect to MySQL server" and your app goes down. Before you start changing random config files, there are exactly five things that can cause this error. Check them in order and you'll find the problem in minutes, not hours.

Mar 9, 2026

Linux Fixes | Adhen Prasetiyo

How to Fix Nginx 502 Bad Gateway on Linux (It's Almost Always PHP-FPM — Here's How to Prove It)

Nginx shows "502 Bad Gateway" and you have no idea where to start. 90% of the time, the problem is PHP-FPM — it either crashed, ran out of workers, or the socket path doesn't match. Here's how to read the error log, find the exact cause, and fix it in minutes.

Feb 20, 2026

Linux Fixes | Adhen Prasetiyo

How to Fix "error: externally-managed-environment" in pip on Linux (What PEP 668 Actually Means)

You run pip install and Linux says "error: externally-managed-environment." This isn't a bug — it's a new safety feature called PEP 668 that prevents pip from breaking your operating system. Here's what actually happened and the 3 ways to fix it properly.

Feb 20, 2026

Linux Fixes | Adhen Prasetiyo

How to Fix "ModuleNotFoundError: No module named" in Python on Linux (The Real Reason pip Install Didn't Work)

You installed a package with pip, but Python still says "ModuleNotFoundError: No module named." You're not crazy — pip and python might be pointing to completely different Python installations. Here's how to diagnose it in 30 seconds and fix it for good.

Feb 20, 2026

Linux Fixes | Adhen Prasetiyo

How to Fix Discord Microphone Not Working on Linux (PulseAudio and PipeWire)

Discord on Linux detects your microphone but nobody can hear you? Or maybe the mic doesn't show up at all? This is almost always a PulseAudio or PipeWire routing issue. Here's how to actually fix it.

Feb 17, 2026

Linux Fixes | Adhen Prasetiyo

apt vs Snap vs Flatpak on Linux — When Each One Breaks and How to Fix It

Confused about whether to install apps via apt, Snap, or Flatpak? Each one breaks in different ways. This guide explains when to use which, common errors for each, and how to fix them.

Feb 16, 2026

Linux Fixes | Adhen Prasetiyo

How to Fix "Could Not Get Lock /var/lib/dpkg/lock" on Ubuntu

Getting "Could not get lock /var/lib/dpkg/lock" when trying to install or update packages on Ubuntu? This happens when another process is using the package manager. Here's how to safely resolve it without breaking your system.

Feb 15, 2026

Linux Fixes | Adhen Prasetiyo

How to Fix No Sound on Ubuntu Linux (PulseAudio & PipeWire Guide)

No audio output on Ubuntu or Linux Mint? The problem is usually PulseAudio or PipeWire misconfiguration, a muted ALSA channel, or the wrong output device selected. Here's how to diagnose and fix it from the terminal.

Feb 15, 2026

Linux Fixes | Adhen Prasetiyo

How to Fix "Permission Denied" Error on Linux (The Complete chmod, chown, and sudo Guide)

Getting "Permission Denied" when running a command or opening a file on Linux? This error means your user account lacks the required permissions. Here's how to fix it properly using chmod, chown, and sudo — without blindly running chmod 777.

Feb 15, 2026