- Linux performance monitoring: https://linoxide.com/monitoring-2/linux-performance-monitoring-tools/
- AWK basic tutorial: https://mistonline.in/wp/awk-basic-tutorial-with-examples/
- Advanced Bash variables: https://www.thegeekstuff.com/2010/05/bash-variables/
- Sourcing: https://bash.cyberciti.biz/guide/Source_command
Table of Contents for
Learn Linux Shell Scripting - Fundamentals of Bash 4.4
Learn Linux Shell Scripting - Fundamentals of Bash 4.4
Published by
Packt Publishing, 2018
- Learn Linux Shell Scripting - Fundamentals of Shell 4.4
- Title Page
- Copyright and Credits
- Learn Linux Shell Scripting – Fundamentals of Bash 4.4
- About Packt
- Why subscribe?
- PacktPub.com
- Contributors
- About the author
- About the reviewer
- Packt is searching for authors like you
- Table of Contents
- Preface
- Who this book is for
- What this book covers
- To get the most out of this book
- Download the example code files
- Download the color images
- Conventions used
- Get in touch
- Reviews
- Disclaimer
- Introduction
- What is Linux?
- What is Bash?
- Summary
- Setting Up Your Local Environment
- Technical requirements
- Choosing between a virtual machine and a physical installation
- Setting up VirtualBox
- Creating an Ubuntu virtual machine
- Creating the virtual machine in VirtualBox
- Installing Ubuntu on the virtual machine
- Accessing the virtual machine via SSH
- Summary
- Questions
- Further reading
- Choosing the Right Tools
- Technical requirements
- Using graphical editors for shell scripting
- Atom
- Atom installation and configuration
- Notepad++
- Using command-line editors
- Vim
- Vim summary
- .vimrc
- Vim cheat sheet
- nano
- Combining graphical editors with command-line editors when writing shell scripts
- Summary
- Questions
- Further reading
- The Linux Filesystem
- Technical requirements
- The Linux filesystem explained
- What is a filesystem?
- What makes the Linux filesystem unique?
- Structure of the Linux filesystem
- Tree structure
- Overview of top-level directories
- What about multiple partitions?
- /bin/, /sbin/, and /usr/
- /etc/
- /opt/, /tmp/, and /var/
- Everything is a file
- Different types of files
- Summary
- Questions
- Further reading
- Understanding the Linux Permissions Scheme
- Technical requirements
- Read, write, and execute
- RWX
- Users, groups, and others
- Manipulating file permissions and ownership
- chmod, umask
- sudo, chown, and chgrp
- sudo
- chown, chgrp
- Working with multiple users
- Advanced permissions
- File attributes
- Special file permissions
- Access Control Lists (ACLs)
- Summary
- Questions
- Further reading
- File Manipulation
- Technical requirements
- Common file operations
- Copying
- Removing
- Renaming, moving, and linking
- Archiving
- Finding files
- locate
- find
- Summary
- Questions
- Further reading
- Hello World!
- Technical requirements
- First steps
- The shebang
- Running scripts
- Readability
- Comments
- Script header
- Verbosity
- Verbosity in comments
- Verbosity of commands
- Verbosity of command output
- Keep It Simple, Stupid (KISS)
- Summary
- Questions
- Further reading
- Variables and User Input
- Technical requirements
- What is a variable?
- Why do we need variables?
- Variables or constants?
- Variable naming
- Dealing with user input
- Basic input
- Parameters and arguments
- Interactive versus non-interactive scripts
- Combining positional arguments and read
- Summary
- Questions
- Further reading
- Error Checking and Handling
- Technical requirements
- Error checking
- Exit status
- Functional checks
- Test shorthand
- Variable refresher
- Bash debugging
- Error handling
- if-then-exit
- if-then-else
- Shorthand syntax
- Error prevention
- Checking arguments
- Managing absolute and relative paths
- Dealing with y/n
- Summary
- Questions
- Further reading
- Regular Expressions
- Technical requirements
- Introducing regular expressions
- What is a regular expression?
- grep
- Greediness
- Character matching
- Line anchors
- Character classes
- Globbing
- What is globbing?
- Similarities with regular expressions
- More globbing
- Advanced globbing
- Disabling globbing, and other options
- Using regular expressions with egrep and sed
- Advanced grep
- Introducing egrep
- sed, the stream editor
- Stream editing
- In-place editing
- Line manipulation
- Final remarks
- Summary
- Questions
- Further reading
- Conditional Testing and Scripting Loops
- Technical requirements
- Advanced if-then-else
- A recap on if-then-else
- Using regular expressions in tests
- The elif condition
- Nesting
- Getting help
- The while loop
- The until loop
- Creating an interactive while loop
- The for loop
- Globbing and the for loop
- Loop control
- Breaking the loop
- The continue keyword
- Loop control and nesting
- Summary
- Questions
- Further reading
- Using Pipes and Redirection in Scripts
- Technical requirements
- Input/output redirection
- File descriptors
- Redirecting output
- stdout
- stderr
- Redirect all output
- Special output redirection
- /dev/null
- /dev/zero
- Input redirection
- Generating a password
- Advanced redirecting
- Redirecting redirections
- Command substitution
- Process substitution
- Pipes
- Binding stdout to stdin
- Practical examples
- Yet another password generator
- Setting passwords in a script
- tee
- Here documents
- Heredocs and variables
- Using heredocs for script input
- Here strings
- Summary
- Questions
- Further reading
- Functions
- Technical requirements
- Functions explained
- Hello world!
- More complexity
- Variable scopes
- Practical examples
- Error handling
- Augmenting functions with parameters
- Colorful
- Returning values
- Function libraries
- Source
- More practical examples
- Current working directory
- Type checking
- Yes-no check
- Summary
- Questions
- Further reading
- Scheduling and Logging
- Technical requirements
- Scheduling with at and cron
- at
- Time syntax
- The at queue
- at output
- cron
- crontab
- Syntax for the crontab
- Logging script results
- Crontab environment variables
- PATH
- SHELL
- MAILTO
- Logging with redirection
- Final logging considerations
- A note on verbosity
- Summary
- Questions
- Further reading
- Parsing Bash Script Arguments with getopts
- Technical requirements
- Positional parameters versus flags
- Using flags on the command line
- The getopts shell builtin
- The getopts syntax
- Multiple flags
- Flags with arguments
- Combining flags with positional arguments
- Summary
- Questions
- Further reading
- Bash Parameter Substitution and Expansion
- Technical requirements
- Parameter expansion
- Parameter substitutions – recap
- Default values
- Input checking
- Parameter length
- Variable manipulation
- Pattern substitution
- Pattern removal
- Case modification
- Substring expansion
- Summary
- Questions
- Further reading
- Tips and Tricks with Cheat Sheet
- Technical requirements
- General tips and tricks
- Arrays
- The history command
- Creating your own aliases
- Command-line shortcuts
- Fun with exclamation marks
- Running commands from the history
- Keyboard shortcuts
- Copying and pasting from the terminal
- Reverse search
- Cheat sheet for interactive commands
- Navigation
- cd
- ls
- pwd
- File manipulation
- cat
- less
- touch
- mkdir
- cp
- rm
- mv
- ln
- head
- tail
- Permissions and ownership
- chmod
- umask
- chown
- chgrp
- sudo
- su
- useradd
- groupadd
- usermod
- Summary
- Final words
- Assessments
- Chapter 2
- Chapter 3
- Chapter 4
- Chapter 5
- Chapter 6
- Chapter 7
- Chapter 8
- Chapter 9
- Chapter 10
- Chapter 11
- Chapter 12
- Chapter 13
- Chapter 14
- Chapter 15
- Chapter 16
- Other Books You May Enjoy
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