Back up your connection before changing network settings. Learn to edit network configurations with nmcli and ifcfg files, set IP v4 addresses, prefix, gateway, and DNS, then reload and verify.

Learn how to securely manage superuser access in Red Hat Linux using su and sudo, switch to other users, and audit elevated commands with sudo logs.

Explore Linux file system permissions, focusing on owner, group, and others with read, write, and execute rights, and learn how the most specific permissions prevail.

Learn to configure Linux file permissions to enable a collaborative group directory. Create the directory, set group ownership to consultants, grant group write, and restrict others.

Explore monitoring process activity in Linux by understanding load average, what the kernel considers, and using uptime, lscpu, and top to interpret CPU and IO load.

Practice monitoring and managing Linux processes with top, create cpu-load scripts, observe cpu usage, manage processes with ps, jobs, and pkill, and save top configurations.

Learn to manage system services with systemctl: list service and socket units, inspect cron and sshd status, start/stop/restart/reload services, enable at boot, mask conflicting services, and inspect dependencies.

Master secure remote administration with OpenSSH by configuring key-based authentication, restricting root logins, and disabling password-based access across Linux systems; learn to access command lines and customize the OpenSSH service.

Manage file access with acls using setfacl and getfacl, adding, modifying, and deleting user, group, and other entries. Apply changes recursively, manage masks, and work with default acl inheritance.

Add a 1 gb zfs partition on sdb with an ms-dos label starting at sector 2048, format it, and configure persistent mounting at /archive via fstab, then reboot to verify.

Master how to configure and test a network attached storage using NFS, persistently mount it via /etc/fstab, enable NFS v4 with the NFS conf tool, and verify with mount.

Describe fundamental concepts of network addressing and routing for a Red Hat Enterprise Linux server, test configurations with command line utilities, and manage static hostname and name resolution using nmcli.

Explore advanced bash scripting techniques through examples, including parameter expansion and indirect reference, associative arrays, and brace expansion. Learn to parse options, handle traps and subshells, and build complex scripts.

Master bash script optimization and performance with practical techniques, from built-in commands and avoiding unnecessary processes to shell arithmetic, double brackets, and command grouping, including profiling for large data sets.

Improve bash script performance by using arrays instead of multiple variables, efficient parsing with read, and handling large data sets with awk, sort, grep -F, and parallel.

Profile and optimize bash scripts using the time command and set -x, then demonstrate practical optimization techniques with printf, shell arithmetic, awk, grep, and sort for faster script execution.

Optimize bash scripts through practical examples, generating data and names files, integrating smaller scripts into a main script, and measuring performance while prioritizing readability.