The Complete Linux Guide - From Beginner to Advanced (2026)

Download VirtualBox from virtualbox.org and install on Windows using the Windows hosts package, then run the wizard, note the network warning, and launch VirtualBox Manager for your Linux lab.

Create your first virtual machine in VirtualBox on Windows, install Linux (RedHat 9 64-bit), assign 2 GB RAM and 1 CPU, and configure a 50 GB disk.

Rocky Linux is an independent downstream of Red Hat Enterprise Linux, replacing CentOS after its end of life, offering compatibility with CentOS and Red Hat for stable web servers.

Configure port forwarding in VirtualBox NAT network to access a Linux virtual machine via PuTTY, using host 127.0.0.1:2222 to guest 10.0.2.15:22.

Master the linux terminal by running commands like date, uptime, who, and pwd, and using help and man pages to understand the home directory and current user.

Discover the Linux file system hierarchy, from the root directory to /bin, /sbin, /usr, /etc, /var, /run, /home, /tmp, /dev, and /boot, and learn each directory's role for system administration.

Learn to copy, move, rename, and delete files in Linux using cp, mv, and rm, with hands-on examples in the lesson five directory.

Learn to manage Linux directories by creating, listing, and navigating with mkdir, ls, and cd, then copy, move, rename, and delete directories using cp -r, mv, and rm -r.

Master the cat command to view file contents, create and copy files with redirection, and number lines with -n, with practical examples like /etc/passwd.

Learn to use grep and regular expressions to analyze log files. Use -i for case-insensitive matches and anchors like ^ and $ in grep dot txt.

Master the grep command to search text in Linux, using case-insensitive matches, starts with, ends with, and contains patterns; combine options, pipe results, and redirect output for log analysis.

Navigate /usr/share/doc with cd, pwd, and ls to read package documentation such as wget and grub, and use rpm to locate doc paths and open them in Firefox.

Learn how to use input and output redirection in Linux to redirect stdout, stderr, and stdin; overwrite or append to files, redirect input, and pipe outputs with cat and tee.

Learn to connect to remote Linux systems via SSH by specifying user and IP or hostname, handle known_hosts and hosts file, and understand host keys for secure login.

Configure ssh key-based authentication by generating a private/public key pair, copying the public key to the remote server, and logging in with the key using an optional passphrase.

learn to disable direct root login over ssh by editing sshd_config, set permit root login to no, restart sshd, and enforce key-based authentication to improve security.

Learn to securely copy files between local and remote systems using scp and sftp over ssh, including uploading, downloading, and copying directories with encrypted transfer.

generate public and private keys and configure key-based authentication for ssh connections to a remote host. copy the public key with ssh-copy-id or manually, and verify passwordless logins.

Master local Linux users and groups management: view user info with id, inspect /etc/passwd and /etc/group, and create or delete users and groups with useradd, userdel, and groupadd.

Modify users and groups, unlock accounts, rename groups, set or change group IDs, assign primary and supplementary groups, and manage password aging and expiry on a Linux system.

Configure a system to use an existing authentication service to centralize user and permission management with LDAP, set up integration, and verify LDAP user login.

Explore Linux file and directory permissions, ownership, and groups, using ls -l and chmod to set read, write, and execute across owner, group, and others.

Learn to set and modify file and directory permissions with symbolic notation. Master owner, group, and other bits, using chmod and ls -l to secure data.

Explore special permissions, including setuid, setgid, and sticky bit, and learn how umask shapes default file and directory access in Linux environments.

Learn to create and manage access control lists (ACLs) with getfacl and setfacl, assign read, write, execute for users and groups, and apply recursive inheritance.

Learn to monitor running processes with the ps command, view pid, terminal type, cpu usage, memory, and state with options like ps x, ps ax, and ps -F.

Learn to manage Linux processes with kill and pkill, sending default sigterm, using sigstop and sigkill, and terminating by pid or by name with practical examples.

Learn to monitor a Linux system with top and uptime, view real-time processes, memory, load averages, and the number of processors, and manage processes by killing or sorting.

Learn how to adjust linux process priority using renice and the nice command, set a niceness from -20 to 19, and verify changes with top while managing processes.

Learn to modify kernel runtime parameters through /proc/sys and sysctl, making one-time on-the-fly changes or persisting them via /etc/sysctl.conf so settings survive reboots.

Install and run iostat to monitor processor, memory, disk, and network usage; use pidstat for current processes; tailor log retention and compression; generate readable system utilization reports.

Learn to manage Linux services with systemctl, list unit types, and check service status. Inspect unit files, enable services, and review logs to troubleshoot sshd and httpd.

Learn how Linux stores and analyzes logs, reads and monitors /var/log files, and uses tail, head, and less to troubleshoot with systemd journald and rsyslog as the logging services.

Learn how rsyslog collects and routes syslog events and forwards logs to another server. Understand log rotation with logrotate, and configure facilities, priorities, and custom files in /etc/rsyslog.d and /etc/rsyslog.conf.

Configure systemd journal to save logs on disk by creating /var/log/journal, setting owner to root and group to systemd-journal, and enforcing rotation and disk-space constraints.

Learn how to reboot and shut down a Linux system using commands like reboot, shutdown, systemctl, init 6, halt, and poweroff, including scheduling and canceling a shutdown.

Learn how to switch between systemd targets manually, such as graphical and multi-user, using systemctl isolate, view dependencies, and set the default boot target.

Learn how to reset the root password by interrupting the boot to emergency mode, remounting the root filesystem as read-write, and relabeling for a secure login.

Learn to mount and unmount Linux file systems using device paths and UUIDs, create mount points, verify with df, and resolve busy mount points with lsof.

Discover how to create, format, and mount vfat, ext4, and xfs file systems, configure fstab for persistence, and use zfs info and zfs repair to manage storage.

Extend an existing logical volume by creating partitions, physical volumes, and a Lion volume group, then format with xfs and grow the filesystem to seven gigabytes.

Create and enable swap by adding a swap partition and a swap file to extend swap size, using fdisk, mkswap, swapon, and updating fstab.

Install the video tool, create a 40g video volume named my video on /dev/sdb, mount it to /my video, format with zfs, and update fstab for permanent mounting.

Learn to configure linux clients for nfs and cifs network file systems, mount shared directories, and create persistent mounts via fstab, with installation steps and verification across environments.

Learn to configure Samba to provide network shares to a specific client using Linux server and Linux client, including host edits, service setup, and mounting the share from the client.

Configure Kerberos integration on an NFS server and client to control access to a shared directory, including setting up keytabs, exporting the share, and enforcing Kerberos authentication.

Configure Linux network with nmcli by listing connections, inspecting devices, creating and activating default and static ethernet connections, and updating IP addresses, DNS, and gateway.

Learn to configure linux network settings by editing ifcfg interface files in the network-scripts directory, assign static ip addresses and dns, and verify with nmcli and ip addr.

Configure linux hostname with hostnamectl and /etc/hostname, edit /etc/hosts for ip mappings and aliases, manage dns with resolv.conf, and use nmcli to set dns and verify with dig or nslookup.