Linux System Engineer: Bash Shell Scripting for Automation

Introduction

• Bash scripting for automation
• What you will need

1. Introduction to Linux Scripting

• Introduction to bash
• What makes a shell script a shell script?
• Using bash debugging mode
• Bash variable scope

2. Using Outside Data in a Script

• Positional arguments
• Load files using while read
• Load files into arrays with mapfile
• Prompt for input
• Pipe data into a script
• Process shell options

3. Outputting Data from a Script

• Saving data to files
• Outputting to STDOUT and STDERR

4. Bash Logic

• Conditional flow with if, then fi
• Conditional flow with case
• Numeric conditions
• String conditions
• File conditions

5. Bash Loops

• For loop
• While loop

6. Real-World Examples

• Monitoring user space usage
• Monitoring CPU usage

Conclusion

• Next steps