Master Vim: Text Editing with Practical Bash Scripting

Write your first bash script with a shebang, echo, and command substitution to greet the user and display the current date, then make it executable and run.

Make your first bash script executable with chmod +x, run it with dot slash, then read a name and greet using a variable and shebang.

Explore bash syntax fundamentals by building and using variables, understanding data types, command substitution, and local versus global scope, with hands-on examples in scripts and functions.

Explore bash basics: treat all data as strings by default; perform arithmetic with $((...)); manage zero-based arrays; and use quotes and command substitution ($() or backticks) to control expansion.

Master bash variables, data types, and command substitution, using special variables like $0, $1, $#, $@, and $. Build scripts that use arguments, exit status, and process IDs.

Navigate the unix file system with bash, mastering pwd, ls, cd, mkdir, cp, mv, touch, rm and rmdir while understanding permissions and directory structure in unix-like systems.

Learn how unix-like systems assign owner, group, and others permissions and adjust them with touch, ls -la, and chmod (symbolic and numeric).

Create a bash script in vim to scaffold a project directory with source, docs, and tests, set 755 and 644 permissions, and verify the structure with ls.

Explore advanced bash concepts by extending a file operations script with special variables, command substitution, user input, timestamps, and file permission management, including modifying the bashrc file.

Explore bash if statements, including basic structure, else and elif, and/or conditions, with practical scripts for file existence, numeric comparisons, and a simple age checker.

Explore test conditions in bash with file, string, and numeric checks, including -f, -d, -r, -z, -n, and comparisons, plus combining with && and ||.

Explores for, while, and until loops in bash, with break and continue, nested loops, and practical file-processing examples.

Master bash loops, including the until loop and its structure, compare it with the while loop, and practice break, continue, and nested loops while processing txt files.

Build a Linux system administration interactive manuscript with a bash script and a menu. Develop a looping menu, case driven actions, and debugging steps to refine the script.

Practice building an interactive bash menu in vim, adding a clear screen option and a number-guessing game, using case statements, while loops, read input, and conditional logic.

Build a Linux system administration interactive menu script in bash that runs a menu loop offering uptime, disk usage, top CPU processes, memory, logs, system load, and large-file search.

Create a Linux system administration menu in Bash using a case statement and read input with sudo. Explore uptime, disk usage, memory, load average, and search for large files.

Learn bash functions as building blocks, define and call with parameters, return values via echo or return, and use local variables with examples like greetings and a number guessing game.

Explore bash functions, using the local keyword to limit scope, and build reusable blocks like even/odd checkers and random number generators for cleaner scripts.

Master bash error handling and debugging with exit statuses, checks, custom functions and traps, plus verbose output and the bash debugger, through practical examples.

Master bash error handling and debugging by using conditional cd, the set e option, a custom error function, and trap-based cleanup.

Master bash debugging with set -x for verbose output, debug statements, and robust error handling using functions, traps, and exit statuses to build reliable scripts.

Master advanced bash scripting techniques with practical examples, including parameter expansion, indirect reference, associative arrays, brace expansion, process substitution, subshells, and parsing command line options.

Master advanced bash scripting techniques with practical examples, including indirect reference and associative arrays. Learn array operations, slicing, process substitution, and brace expansion for efficient scripting.

Master advanced input-output redirection, including stdout and stderr to files and here documents for multi-line input. Explore subshells, command grouping, traps and signals, recursive functions, and parsing options with getopts.

Explore advanced bash scripting techniques through a practical script example, counting file extensions with an associative array, a traverse function, here documents, and trap cleanup; most common extension is ssh.

Master bash script optimization and performance by applying built-in commands, avoiding unnecessary processes, and using efficient constructs like grep without cat, double parentheses, double brackets, and braces for grouping.

Explore Bash script optimization techniques, moving from multiple variables to arrays, using read with here strings, awk for large data sets, and parallel processing to boost performance.

Profile your scripts using time and set -x to pinpoint bottlenecks; build and test a script demonstrating optimization techniques including printf, awk, grep, and sort -u.

Learn bash scripting optimization techniques by building scripts that generate data.csv, large_file.txt, and names.txt, fix typos, handle file existence, and improve performance.

Learn practical bash scripting optimization techniques by integrating three smaller scripts into a main script, generating data.csv, large_file.txt, and names.txt, then measuring performance and emphasizing readability and maintainability.

Improve command line productivity by automating tasks with bash scripting, using loops, conditionals, grep, and regular expressions, and writing executable shell scripts with proper shebangs, quoting, and error handling.

Practice writing a simple bash script with vim, including a shebang and echo commands, redirecting output to output.txt, then run and review it, extend it, and make it executable.

Master bash loops to automate repetitive tasks, iterate over lists with for loops, and manage exit codes and tests with conditional structures.

Use for loops to print hostnames from multiple servers with ssh and hostname, then implement the same logic in a shell script and verify exit status.

Master regular expressions to match text and date, apply them with grep to files and piped data, and use anchors, wildcards, classes, and multipliers in vim, grep, and less.

Practice guided grep and regex techniques to search system logs, filter by date and time, and inspect postfix configuration and mail logs.

Explore how grep uses regular expressions to match data, with options like -i, -v, -R, and -E, and combining commands via pipes to search files such as httpd.conf and hosts.

Create a bash script gathering host data with hostname -f and lscpu. Filter with grep and regex, and save outputs to two server files using a loop and SSH keys.

Master building bash scripts that use echo with quotes, manage variables and environment variables, apply command substitution, and redirect input and output, including inline input redirection.

Explore bash if-then statements, verify exit statuses, and use then, else, and elif blocks to control script flow with nested conditions and cleaner code.

Explore the test command in bash if-then statements to evaluate numeric, string, and file conditions, and master exit statuses, square brackets, and dash n and dash z for string length.

Explore file and directory tests in shell scripting, including -d, -e, -f, -r, -s, -w, -x, -O, -G, and -nt/-ot, to validate existence, permissions, ownership, and timestamps in scripts.

Master Vim teaches using compound tests in bash, combining conditions with and and or operators, and exploring subshells, arithmetic with double parentheses, and string matching with double brackets.

Explore practical bash scripting by using the case command to evaluate variables, handle multiple patterns, and simplify complex if-else logic with robust package manager analysis.

Explore bash shell looping with the for command, iterating through a list of values to perform repeated commands, including handling quotes, spaces, and command output.

Explore bash for loops, manage field separators with IFS, iterate files with wildcards. Use C-style for with multiple variables while preserving spaces handling.

Master the while and until loops in Bash by testing conditions with brackets or the test command, control execution with exit statuses, and explore nested loops to avoid infinite loops.

Control loops with nested for loops and dynamic IFS to parse lines and inner fields, including etc. password data, while using break and continue to manage flow and redirect outputs.

Explore practical shell loop examples that iterate data, locate executable files across the path environment variable, and process csv user data with for and while loops.

Learn to pass and read command line parameters using Bash positional parameters, handle spaces with quotes, and validate inputs, while using $0 and braces for beyond ninth parameters and logging.

Learn to count and validate bash command line parameters with $# and access them with $*, $@, and shift, including last-parameter tricks.

Process command line options in shell scripts with case statements to identify options. Separate options with a double dash and shift to process parameters.

Master the read command to capture user input in bash, using -p for prompts, -n and -t for limits, -s for silent input, and store input in the reply variable.

Explore a practical bash script that tests network connectivity with the pin command, selecting IP addresses via command line options or a file, and using getopts and read for input.

Discover how the Linux system uses standard input, output, and error streams and how to redirect, append, and mix them with file descriptors 0, 1, and 2.

Learn to redirect stdout and stderr in bash scripts using temporary and permanent file descriptor redirections, with exec-based tricks and stdin redirection for effective log handling.

Learn to redirect input and output file descriptors, save and restore stdin, read and write from the same descriptor, and close descriptors while using lsof to list open fds.

Suppress script output with /dev/null and manage temporary work using mktemp in the /tmp directory, then log results with tee for dual display and file storage.

Read a csv file and produce sql inserts for a MySQL database, using file redirection, a while loop, and stdout, stdin, and stderr handling.

Explore how to run and control bash scripts on Linux using signals, including sigint, sigterm, and sigkill, and handle signals and manage jobs with ps and kill.

Learn to use the trap command to monitor and handle Linux signals in bash scripts, capturing signals like SIGINT and implementing exit traps for graceful termination.

Learn to run shell scripts in background on Linux by appending an ampersand, manage stdout and stderr, and use nohup to keep processes running after logout.

Run scripts in the background after exiting the terminal using the no hop command to ignore sighup signals, redirecting stdout and stderr to nohup out for later review.