Navigate the Linux file system using absolute and relative paths, the current directory, and identify regular, directory, executable, symbolic link, and device files with file and ls -la.

Learn how to copy, move, rename, and remove files and directories with cp, mv, and rm, using -i prompts and -r for recursive directory operations.

Clarify how ext file system attributes govern delete, modify, rename, and compress operations on files and directories using lsattr and chattr, including append, immutable, and synchronous.

Master the find command to locate files and apply actions with dash exact, changing permissions from 777 to 644, deleting files, and filtering by type, name, owner, and emptiness.

Learn to find files larger than 100 megabytes and produce a long listing saved to /tmp/big_files using the find command with size and exec options, plus megabyte size notation.

Discover how to manage Linux file and directory permissions by creating items, applying chmod settings (0700, 0711, 0777, 0000, 644), and using recursive, umask, and ownership commands to control access.

Install vim on Linux, macOS, and Windows, then practice navigation (h, j, k, l, 10J, 20K, W, B, $, 0), enter insert mode with I, and exit with :q.

Explore Vim from basic file creation to advanced text manipulation, with navigation, deletion, and yanking, and efficient editing. Use visual mode, substitutions, and window and buffer management.

Practice text editing in Vim by creating a file, entering insert mode, and performing edits such as replacing words, deleting content, undoing changes, and using motion and command sequences.

Discover how to search words in files with grep and count results using -n, -c, and -v, then count words and lines with wc for quick document insight.

Learn to use pipes to streamline tasks by connecting who to sort and wc -l, producing a sorted user list and a login count without temporary files.

Learn how process niceness sets priority across 40 values from minus 20 to plus 19, with default zero, viewable via ps or top, and adjustable with nice and renice.

Learn how to control Linux processes with signals, using kill and pkill to send signals like SIGHUP, SIGINT, SIGTERM, and SIGKILL for graceful or forced termination and configuration reload.

Master changing passwords with passwd, including entering the old and new password, then grasp shell and environment variables, assign and access them, and understand how path directs command lookup.

Learn chaining operators in Linux commands, including ampersand for background jobs, semicolon for sequential execution, and end operator, or operator, and not operator to control flow by success or failure.

Perform exit, reboot, power off, and shutdown on Red Hat Linux, using options like -h, -p, -r, and timed schedules, while understanding root privileges and authentication requirements.

Learn how bash history works, including startup and initialization files, history loading from ~/.bash-history, and controlling history with HISTSIZE and HISTFILESIZE, plus commands to view, edit, and search history.

Learn to view, create, and manage shell aliases using the alias and unalias commands, make per-session or permanent aliases via .bashrc, and switch users to see alias behavior.

Master scheduling one-time and recurring tasks with atd and cron-d, including job submission, time formats, and access control via allow and deny files.

Master rpm package management using key query options (-q, -qa, -qc, -qd) and install options (-F, -I, -U, -H, -V) to manage packages and dependencies.

Manage hostnames in Red Hat Enterprise Linux. Learn what a hostname is, where it’s stored, how to view it, and set it permanently with hostnamectl, /etc/hostname, and update /etc/hosts.

Configure networking with the Network Manager command line interface nmcli, and manage devices and connections, including DHCP and static configurations, using nmcli-con-show, nmcli-dev-status, and nmcli-con-add.

Demonstrate gaining superuser access with sudo and su, compare non-login and login shells, and practice managing home and path variables while running commands as root and a normal user.

Create operator and admin supplementary groups, add users to these groups, verify memberships with id and /etc/group, and grant sudo privileges via /etc/sudoers.d/admin.

Learn how Red Hat Enterprise Linux manages user passwords with etc.shadow, includes password aging and expiration, and uses account controls like locking and no-login shells.

Remove test users and groups, including service admin and web, db, backup, secure, and EMV users. Archive sudoers files under etc/sudoers.d/archive and verify the sudoers integrity.

Learn sudoers best practices and how to set up a configuration repository with service, web admin, and environment security role files to enforce least privilege.