How To Write Bash Scripts In Linux - Complete Guide (Part 6 - Exit Codes)

Master exit codes in Bash and understand how Linux indicates success or failure for commands. In this episode of LearnLinuxTV’s complete Bash Scripting course, you’ll learn how to check whether tasks completed successfully using exit codes. We’ll cover how exit statuses work, how to capture and use them in your scripts, and why they’re critical for automation and error handling. Perfect for beginners looking to build reliable and intelligent Bash scripts.
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Time Codes
00:00 - Intro
00:54 - What are "Exit Codes" in Linux?
01:31 - How does Bash perceive success and failure?
02:16 - Checking the $? variable to determine a command's Exit Code
03:35 - How to interpret the value of Exit Codes in Linux
04:15 - Why it can benefit us to utilize Exit Codes in our Bash Scripts
05:22 - An example Bash Script that utilizes Exit Codes
07:48 - More efficiently utilizing Exit Codes in our Bash Scripts
14:42 - An example script that illustrates why execution order is important in Bash
20:55 - How to manipulate the exit code of a task
23:35 - Another example of task order in Bash being very important
OTHER BASH SCRIPTING SERIES EPISODES
- Class 01 Introduction: https://linux.video/bash1
- Class 02 Hello World: https://linux.video/bash2
- Class 03 Variables: https://linux.video/bash3
- Class 04 Math Functions: https://linux.video/bash4
- Class 05 If Statements: https://linux.video/bash5
- Class 06 Exit Codes: https://linux.video/bash6
- Class 07 While Loops: https://linux.video/bash7
- Class 08 Universal Update Script: https://linux.video/bash8
- Class 09 For Loops: https://linux.video/bash9
- Class 10 Where To Store Your Scripts: https://linux.video/bash10
- Class 11 Data Streams: https://linux.video/bash11
- Class 12 Functions: https://linux.video/bash12
- Class 13 Case Statements: https://linux.video/bash13
- Class 14 Scheduling Jobs (Part 1): https://linux.video/bash14
- Class 15 Scheduling Jobs (Part 2): https://linux.video/bash15
- Class 16 Arguments: https://linux.video/bash16
- Class 17 Building a Backup Script: https://linux.video/bash17
- Class 18 Closing: https://linux.video/bash18 Full Linux Courses
• Linux Crash Course https://linux.video/cc
• Netdata https://linux.video/netdata
• tmux https://linux.video/tmux
• vim https://linux.video/vim
• Bash Scripting https://linux.video/bash
• Proxmox VE https://linux.video/pve
• Ansible (Udemy) https://learnlinux.link/ansible
• Linux Essentials (Udemy) https://learnlinux.link/linux-essentials
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