Tag: bash

Techniques for Writing Robust, Reliable Bash Scripts

Write bash scripts that don't silently fail — set -euo pipefail, error handling, input validation, and logging patterns for production scripts.

Preserving Bash History in Multiple Terminal Windows

By default bash history is lost across multiple terminal sessions. Fix it with HISTAPPEND and PROMPT_COMMAND so nothing gets overwritten.

Finding the PID of a Process Using a Specific Port in Linux

Something's squatting on port 8080 and you need to know what. ss, lsof, and fuser one-liners to find and kill the culprit fast.

Differences Between nohup, disown, and & in Linux

nohup, disown, and & all keep processes running after logout — but they work differently. Here's which one to reach for and why.

Understanding printf vs echo in Bash

echo is convenient but inconsistent across systems; printf is portable and precise — know when to use each and avoid the gotchas.

Understanding Grep: A Comprehensive Guide

grep is more powerful than you think — regex patterns, context flags, recursive search, and piping tricks that save hours of log digging.

Essential Linux Commands for Daily Use

The Linux commands every sysadmin reaches for daily — file ops, process management, networking, and text manipulation you can't live without.

Multiple Actions with a Single docker exec Call

Run multiple commands in one docker exec call using sh -c — pipe commands, chain with && or ;, and avoid repeated container roundtrips.

Mastering xargs in Linux

xargs turns stdin into arguments — build complex pipelines, run parallel jobs, and handle filenames with spaces without breaking everything.

FFmpeg: Advanced Video & Audio Manipulations

Advanced FFmpeg techniques — filter graphs, stream mapping, subtitle burning, speed adjustment, and batch processing scripts.

Executing Commands with Asterisks in Docker

Shell globbing breaks inside docker exec because of how args are parsed — here's how to pass wildcards and asterisks correctly.

FFmpeg: Comprehensive Audio Processing Techniques

FFmpeg audio processing — normalize levels, convert formats, mix tracks, extract audio from video, and apply filters from the command line.