Learn how to search and filter text using Linux grep command. Master basic searches, case-insensitive matching, counting matches, regular expressions, and advanced pattern matching with practical examples.
Master while loops and create interactive menu-driven bash scripts. Learn to build professional command-line interfaces with functions, case statements, and user input validation for automation tools.
Learn how to monitor system processes with ps aux, understand process attributes like PID, CPU, and memory usage, and master AWK for text processing and data extraction from command output.
Master cron job scheduling with detailed explanations of crontab syntax, field meanings, and special characters. Learn to automate tasks, test cron jobs, and troubleshoot common issues.
Master the tee command for output logging, understand exit codes for robust error handling, and learn powerful string manipulation techniques including length, substring extraction, and pattern replacement.
Master Bash arrays with detailed explanations of the @ symbol, array operations, and command substitution. Learn to capture command output and build dynamic scripts.
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Master Bash case statements for multi-condition logic and learn to create reusable functions with parameters. Build professional service control scripts with detailed examples.
Learn to build a practical bash script that validates input and compares numbers using if-elif-else statements. Master the -z operator for checking empty strings and command line arguments.
Master if-else statements in bash scripting. Learn file testing with -f, string testing with -z, and build intelligent scripts that make decisions based on conditions.
Master command line arguments in bash scripts. Learn to handle single and multiple parameters, validate input, and build professional command-line tools with proper error handling.