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Day 12: Linux Terminal & Session Management Commands 🖥️

Overview

Practiced 8 essential Terminal & Session Management Commands hands-on on a live Ubuntu Server as part of my 100 Days DevOps & Cloud Engineering Challenge.

Commands Mastered Today

# Command Description Hands-on Example
1 agetty Manages terminal login prompts agetty 9600 tty1
2 chvt Switch between virtual terminals chvt 2
3 reset Reset terminal to normal state reset
4 screen Run multiple terminal sessions screen -S mysession
5 showkey Display keyboard key codes showkey
6 stty Change terminal settings stty -a
7 tty Display current terminal name tty
8 xdg-open Open file/URL from terminal xdg-open file.pdf

Key Learnings

  • screen — Most powerful command in this module. Lets you run multiple terminal sessions inside one window. Even if SSH connection drops — processes keep running! Essential for long-running tasks on remote servers.
  • reset — When terminal gets messed up with weird characters — one command fixes everything instantly!
  • tty — Shows which terminal you are currently using. Useful when working with multiple sessions.
  • stty — Controls terminal behavior like backspace, line endings, and special characters.
  • chvt — Switch between virtual terminals without closing current session.
  • agetty — Manages terminal login — runs in background on every Linux system automatically.
  • xdg-open — Opens any file with its default application directly from terminal.
  • showkey — Shows key codes when keys are pressed. Useful for keyboard configuration and scripting.

screen Command — Deep Dive

# Start new named session
screen -S mysession

# List all sessions
screen -ls

# Detach from session (keep running)
Ctrl + A, then D

# Reattach to session
screen -r mysession

# Kill a session
screen -X -S mysession quit

Why screen matters in DevOps: When connected to a remote server via SSH and running a long task — if connection drops, task stops. With screen — task keeps running in background!

Environment

  • OS: Ubuntu Server (AWS EC2)
  • Source: GeeksForGeeks Linux Track
  • Status: ✅ All commands practiced on live terminal

Part of my 100 Days DevOps & Cloud Engineering Challenge Follow my journey: LinkedIn