- We used the ext4 file system. In the mount command, we first specified which directory we wanted to mount, followed by the directory in which we will mount it with the ro and noexec options.
- We mounted the directories using the default options.
- We used the scp command to copy files from a remote host to the local host.
- Title Page
- Copyright and Credits
- Packt Upsell
- Contributors
- Preface
- Crash Course in Bash
- Getting started with Bash and CLI fundamentals
- Creating and using basic variables
- Hidden Bash variables and reserved words
- Conditional logic using if, else, and elseif
- Case/switch statements and loop constructs
- Using functions and parameters
- Including source files
- Retrieving return codes and output
- Linking commands, pipes, and input/output
- Getting program input parameters 
- Getting additional information about commands
- Summary
- Acting Like a Typewriter and File Explorer
- Introduction
- Basic searching for strings and files
- Using wildcards and regexes
- Math and calculations in script
- Striping/altering/sorting/deleting/searching strings with Bash only
- Using SED and AWK to remove/replace substrings
- Formatting your data/output using echo and printf
- Readying your script for different languages with internationalization
- Calculating statistics and reducing duplicates based on file contents
- Using file attributes with conditional logic
- Reading delimited data and altered output format
- Understanding and Gaining File System Mastery
- Introduction
- Viewing files from various angles – head, tail, less, and more
- Searching for files by name and/or extension
- Creating a diff of two files and patching
- Creating symbolic links and using them effectively
- Crawling filesystem directories and printing a tree
- Finding and deleting duplicate files or directories
- Joining and splitting files at arbitrary positions
- Generating datasets and random files of various size
- Making a Script Behave Like a Daemon
- Introduction
- Running a program continuously (forever) using looping constructs or recursion
- Keeping programs/scripts running after logoff
- Invoking commands when they require permissions
- Sanitizing user input and for repeatable results
- Making a simple multi-level user menu using select
- Generating and trapping signals for cleanup
- Using temporary files and lock files in your program
- Leveraging timeout when waiting for command completion
- Creating a file-in-file-out program and running processes in parallel
- Executing your script on startup
- Scripts for System Administration Tasks
- Introduction
- Gathering and aggregating system information
- Gathering network information and connectivity diagnostics
- Configuring basic network connectivity
- Monitoring directories and files
- Compressing and archiving files
- Rotating files from RAM to storage for log rotation
- Using Linux iptables for a firewall
- Accessing SQL databases remotely or locally
- Creating SSH keys for password less remote access
- Creating and configuring cron Jobs for task scheduling
- Creating users and groups systematically
- Scripts for Power Users
- Introduction
- Creating Syslog entries and generating an alarm  
- Backing up and erasing media, disks, and partitions with DD
- Creating graphics and presentations on the CLI
- Checking for file integrity and tampering
- Mounting network file systems and retrieving files
- Browsing the web from the CLI
- Capturing network traffic headlessly
- Finding binary dependencies
- Fetching time from different locations
- Encrypting/decrypting files from a script
- Writing Bash to Win and Profit
- Introduction
- Creating a lame utility HTTP server
- Parsing RSS feeds and output HTML
- Scraping the web and collecting files
- Making a simple IRC chat bot logger
- Blocking IP addresses from failed SSH attempts
- Playing and managing audio from Bash
- Creating a simple NAT and DMZ firewall
- Parsing a GitHub project and generate a report
- Creating a poor man's incremental remote backup
- Using Bash scripts to monitor udev input
- Using Bash to monitor battery life and optimize it
- Using chroot and restricted Bash shells to secure scripts
- Advanced Scripting Techniques
- Introduction
- Calculating and reducing the runtime of a script
- Writing one-line conditional statements and loops
- Avoiding command not found warnings/errors and improving portability
- Creating a config file and using it in tandem with your scripts
- Improving your shell – GCC and command line colors
- Adding aliases, and altering user paths/variables
- Echoing output to raw terminal devices
- Creating simple frontend GUIs for Bash scripts
- Compiling and installing your own Bash shell
- Recording terminal sessions for automation
- Writing high-quality scripts by example
- Other Books You May Enjoy
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