Watch Bash Scripting Deep Dive: From Shortcuts to Production Scripts Video Tutorial

Master bash scripting with practical one-liners to manage files and directories efficiently. Learn to filter data and automate tasks. This guide focuses on essential bash scripting techniques for developers and system administrators working in the linux terminal. We break down how to use commands like du to find large files quickly, allowing you to clean up storage or audit system usage without complex scripts. You will also see how to apply bash one liners for streamlined data processing. The demonstration includes building a script that checks for file existence and validates content using regex patterns. These methods help you handle file management tasks faster by leveraging the power of the linux command line directly in your shell environment. - - - - - Critical Administration Skills for Red Hat Enterprise Linux: Whether you are new to Linux or new to RHEL, join our hosts for a hands-on look into the commands and processes, ask questions, and grow your knowledge. Get Started with Red Hat Enterprise Linux: https://developers.redhat.com/register Try it for yourself: https://redhat.com/interactive-labs Join our Discord: https://red.ht/rhel-discord Nate Lager: https://social.undrground.org/@gangrif Scott McBrien: https://www.linkedin.com/in/scott-mcbrien-349b356 Episodes: Bash: Shortcuts and Scripting Tutorial for Linux | Ep 108: https://youtube.com/live/qZUC8kywPW4 Automating Tasks with Bash Scripts | Ep 109: https://youtube.com/live/PxW2CxsuYEU Linux Command Line Tips and Tricks | Ep 143: https://youtube.com/live/vmhvHeesZH8 Basic shell scripting for Linux administrators | Ep 160: https://youtube.com/live/YFFVA5A08qw Manipulating the CLI | Ep 17: https://youtube.com/live/2e0KLdApgSE Writing Shell Scripts | Ep 18: https://youtube.com/live/hK5IMwyX_vM Ifs, Loops, and Scripting | Ep 20: https://youtube.com/live/XzrAvLVKIYM 00:00 Intro to Bash Scripting on Linux 00:23 Find Disk Hogs with du 00:58 Sort and Trim Results 03:42 Drill Down with Max Depth 04:42 Log Parsing One Liners 06:15 Extract IPs with Regex 08:23 Count Offenders with sort uniq 13:59 Turn One Liner into Script 18:31 Script Arguments and If Tests 29:08 Automate Backups with BKP 30:05 Build the BKP script 30:56 BKP validation and exits 36:00 Dirname basename backup path 41:53 Unique backup filenames 44:23 Install BKP on PATH 46:13 Why backups matter 48:02 Q and A and takeaways 51:18 Version audit script setup 52:32 Iterative Scripting Mindset 53:16 Script Args and Assumptions 54:30 Query Package Versions 57:02 Parsing RPM Output 59:38 Custom RPM Queryformat 01:02:52 Validate with Updates 01:03:45 Run Checks Over SSH 01:06:04 Loop Through Systems File 01:08:29 Clean SSH Output and Hostnames 01:11:55 Colorized Results and Next Steps 01:14:12 Ideas To Extend Script 01:17:33 CVE Reporting With Insights 01:19:54 Regex And RPM Packaging Resources 01:22:01 Switch To CLI Tips Segment 01:23:01 Tab Completion Power 01:26:08 Shell History Shortcuts 01:27:58 History Search And Limits 01:33:27 Line Navigation Keys 01:36:50 Alt Word Jumps Caveats 01:39:13 Inline Editing Tricks 01:42:25 Cut Paste Kill Yank 01:44:53 Shortcut Cheat Sheet Graphic 01:45:58 Transpose Typos Fast 01:47:28 Swap Last Two Words 01:48:58 Fix Broken Terminal 01:51:22 Clear and Logout Shortcuts 01:52:37 Aliases Explained 01:56:25 Dynamic Prompt with SELinux 02:02:06 Profile vs Bashrc 02:04:23 Shell Script Basics 02:13:50 Script Arguments and Params 02:22:16 Conditionals If Elif Else 02:25:59 Handling Equal Values 02:27:30 Bash Variable Naming 02:29:13 File Tests with -f 02:30:26 Why Elif Skips Checks 02:33:32 Case Statements Overview 02:35:08 Directory Tests and -e 02:38:22 String Comparisons Gotchas 02:41:05 For Loops Basics 02:45:26 Seq and Command Substitution 02:49:13 While Loops and Counting 03:13:57 Silencing Errors with Dev Null 03:15:10 Pipes and Standard Input Limits 03:17:54 Stdin Stdout Stderr Recap 03:19:22 Overwrite vs Append Redirects 03:24:16 Redirecting Both Output and Errors 03:25:59 Writing a First Shell Script 03:29:18 Permissions and Running Scripts 03:32:04 PATH and Environment Variables 03:37:31 Interactive Input and Script Arguments 03:52:29 If Statements and Loops Deep Dive 03:56:13 For Loops with Multiple Users 04:02:06 Fixing If with Quotes 04:04:43 Else Branch Diagnostics 04:10:49 File Checks and Elif Logic 04:17:36 Final Logic Cleanup