Introducing Linux Command Line and Practical Shell Scripting

Master vim navigation by switching between normal and insert modes, using hjkl, moving by word and paragraph, searching with / and n, and saving with :wq.

Install Vim on Ubuntu, macOS, or Windows, then practice basic navigation using h j k l, w, b, 0, and $, enter insert mode with i, and exit with :q.

Master advanced vim navigation and editing by locating Python occurrences with / and n/N, deleting with dw and D, and inserting new lines with O/o, and undoing with U.

Explore the powerful world of vim through basic and advanced editing techniques, from creating and editing files to navigation, text manipulation, and efficient workflows using commands, visual modes, and substitutions.

practice text editing in vim by creating a file, entering insert mode, pasting text, deleting, undoing, and replacing words. navigate, search, and use commands to modify lines in shell scripting.

Learn practical vim editing skills on the linux command line, including searching, visual selection, deleting, inserting, and reordering sections to organize scripting languages and system administration content.

Practice editing in vim by deleting lines, replacing scripting with programming, and adjusting indentation; learn search and replace, yank and paste, change inside parentheses, and visual selections.

Learn advanced Vim workflows for managing multiple files: split windows, diff two configs, edit across three buffers with bufdo, and apply global changes across all buffers.

Learn to chmod a bash script to executable, run it with bash or dot slash, and use a shebang for portability, then expand with user input and variables.

Explore file permissions in unix-like systems, including owner, group, and others, using ls, touch, and chmod. Learn symbolic and numeric methods to grant read, write, and execute access.

Build a practical bash script to create a project directory structure with mkdir, touch, and vim, then set and verify permissions with chmod and ls -R and ls -l.

Build a Linux system administration interactive menu script using bash to perform uptime, disk usage, top cpu processes, memory, and logs via a persistent menu loop.

Profile bash scripts to optimize performance with the time command and set -x, then demonstrate printf, shell arithmetic, command substitution, awk, grep, and sort.

Improve bash script performance by combining data generation, large file handling, and names creation while measuring before and after optimization. Emphasize readability and maintainability to troubleshoot errors effectively.

Explore regular expressions for text matching in command output and files, using grep, vim, and less, with syntax, anchors, wildcards, and examples across Perl, Python, and C.

Explore how if-then statements drive bash scripting, using exit status, then and else blocks, nesting, elif, and practical examples like PWD and grep in the /etc/passwd file.

Explore how the test command drives if statements in bash, using numeric, string, and file comparisons; learn to use square brackets, escape characters, and handle empty or uninitialized variables.

Master while and until loops in Bash by testing conditions with the test command and exit status, including nested loops, to prevent infinite loops.

Learn how to pass data to bash scripts using command line parameters and positional parameters, including dollar zero and dollar one, with handling of spaces using quotes.

Master output control in Linux scripts by redirecting stdout and stderr with file descriptors, using temporary and permanent redirection, and redirecting stdin for data processing.

Learn to suppress script output with /dev/null, create and manage temporary files and directories using mktemp in /tmp, and log output to monitor and a file with the t command.

Learn to run shell scripts in the background with an ampersand, see job numbers and pids, and keep them running after logout using nohup, redirecting stdout and stderr.

Learn how to start a shell script in the background with nohup, which blocks sighup signals, redirects stdout and stderr to nohup.out, and lets you log out.