3 Days Linux Administration Course

Learn the essentials of Linux system administration and the tasks involved in managing a Linux system.

Develop hands-on skills in linux access control by determining file types, managing permissions and ownership, and using pipes to filter and redirect command output.

Use what is and man to access quick and full command information, and explore ls, cd, and pwd with dash help to see options and descriptions.

Learn to add text to files using vi, echo with redirection, and cat to view content, including append versus overwrite with single and double redirects, and touch for empty files.

Master Linux file maintenance commands such as cp, rm, mv, mkdir, rmdir, rm -r, and change group and ownership with chgrp and chown for files and directories.

Explore file display commands in Linux, including cat, more, less, head, and tail, and learn how to view entire files, page by page, or by specific top or bottom lines.

Master Linux text processing commands, including cut, awk, grep, sort, uniq, and wc, through practical Seinfeld file examples that include cat, piping, and notes on sort before uniq.

Learn how to compare files in Linux using diff and cmp, with diff performing line-by-line comparisons and cmp byte-by-byte, demonstrated via a putty session and basic command workflows.

Master tar archiving and gzip compression in the 3 days linux administration course by creating tar archives with c v f and extracting with gunzip or tar xvf.

switch users with su - username to become another user or root, then use sudo to run commands. edit /etc/sudoers to grant rights and add users to the veal group.

Monitor Linux users with who, last, w, finger, and id; view login times and terminals, and practice piping, awk, sort, and unique for user activity.

Discover essential Linux system utility commands such as date, uptime, hostname, uname, which, cal, and bc, and learn how to locate them in /usr/bin and verify your host after login.

Master essential Linux system monitoring commands to assess performance and resource usage, including top, df, dmesg, iostat, netstat, free, cpu info, and memory information.

Explore Linux system maintenance commands, including shutdown, halt, reboot, and init, to manage reboots, shutdowns, and transitions to single-user or multi-user modes.

Learn to change a Linux host name using root privileges, running commands such as hostnamectl set-hostname, editing /etc/hostname, and rebooting to apply the new hostname.

Use uname -a, cat /etc/redhat-release, and cat /etc/*rel* along with dmidecode to identify the operating system, kernel, and hardware. Understand why checking the hostname matters before rebooting.

Master terminal control keys in Linux by using ctrl+c, ctrl+u, ctrl+z, and ctrl+d to erase, stop, suspend, or exit interactive programs.

Learn how the Linux kernel interfaces hardware and software, acting as the core program inside the operating system that executes shell commands and enables applications to run.

Understand how the shell acts as the interface between users and the kernel, managing the environment. Identify your shell with echo $0 and view available shells with cat /etc/shells.

Learn to create and run shell scripts in bash to automate tasks. Understand script structure, including the first line with /bin/bash, comments, executable permissions, and absolute paths.

Learn how aliases shorten long Linux commands, create and verify them, and remove them with unalias, using practical examples like ls, pwd, and df -h.

Learn how the shell history and history command capture every command, and use history, pipe to more, grep, and bang execution to troubleshoot and reuse commands.

Learn to work with /etc files like nsswitch.conf, hosts, resolv.conf, and network scripts, assign static or DHCP IPs, and use ping, ifconfig, netstat, and tcpdump.

Use ethtool and ifconfig to identify and gather NIC information, including the main interface, loopback, and virbr0, and interpret speed, duplex, and link status for troubleshooting.

Explore how yum installs packages from defined repositories and how rpm handles local package installs. Compare their internet needs, dependencies, and basic verification and removal tasks.

Master system upgrade and patch management in Linux, including major versus minor version upgrades, using yum update and yum upgrade, and verifying current version before applying updates.

Learn linux system run levels from 0 to 6, including power off, single user, multiuser with or without networking, and gui; practice init commands and check with who -r.

In linux, use trace route to map the journey of a packet from source to destination, revealing each hop through gateways and DNS servers and helping troubleshoot network issues.

Explore Linux's future across cloud and servers, machine learning and AI, enterprise adoption, security, edge computing, and open source development.

Learn how virtualization creates software-based representations of servers and networks, enables multiple operating systems under a hypervisor, and uses VMs, virtual desktops, snapshots, and cloning.

Explore VMware virtualization and cloud computing with ESXi, vSphere, and vCenter. Learn to create clusters of ESXi hosts, manage virtual machines, templates, storage, and networking.

Master download, installation, and configuration of VMware Workstation Player to run multiple operating systems, including Windows 64-bit and Linux 64-bit, via the setup wizard and GUI.

create and configure a virtual machine in VMware Workstation by attaching a CentOS ISO, selecting hardware options, and booting from the installer to complete the Linux installation.

Install oracle guest additions on a linux vm by updating the kernel and installing gcc, kernel-devel, dkms, and enabling mouse integration; then mount the guest additions cd and run installer.

Install Oracle VirtualBox on Mac to enable virtualization for Linux environments. Learn installation steps, configuration basics, and practical use for Linux administration.

Set and observe default file permissions with umask to control newly created files and directories. Learn how to persist settings by updating dot bashrc and inspect with ls and touch.

Troubleshoot change directory issues by verifying the directory exists, using correct case, distinguishing absolute vs relative paths, and confirming directory execute permissions and hidden directories.

Identify why an IP address is assigned but not reachable by verifying the correct interface with ifconfig, checking the gateway and VLAN, then ping the gateway.

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