Linux Command Line Interface and BASH Scripting

Discover how to use man and --help to view command options, read help pages in the less viewer, and quickly understand Linux commands in the terminal.

Learn how the ls -lh option displays file sizes in a human readable format, converting bytes to megabytes and kilobytes, and how to combine options as -l -h or -lh.

Learn how to use the cp command to copy files in Linux, using relative and absolute paths and the dot shortcut to copy from and to the current directory.

Learn how rm -rf uses recursive and force options to delete a directory tree and suppress prompts, while warning about potential deletion of important files.

Learn how to control command output with pipes and redirection operators, including overwriting and appending to files.

Explore multiple pipes to pass output through cut, grep, head, and tail, extracting fields like the ip address. Build one-line commands and aliases to display the ip address instantly.

Create a bash hello world script with a shebang, echo hello world, make it executable with chmod, and run it via a relative path or full path.

Learn how to use conditionals in Bash with the if statement to check conditions, execute actions when true, and take alternatives when not.

Master bash if statements by using relational operators: less than, greater than, less than or equal, greater than or equal, equal, or not equal, using proper spaces and else echo.

Master bash scripting with the if condition, using and (&&) and or (||) operators. The lecture shows reading into variables A and B and testing for John or Mark.

Learn to read user input in bash, store it in variables, and compare two numbers with if statements, echoing which is bigger or if they are equal.