Master’s Program in Linux Administration (RedHat)

Introduction to Shell Scripting concepts, special variables used, learning about command line arguments, working with Special Parameters, passing arguments to a Shell Script, inheritance rules.

Hands-on Exercise – Pass command line arguments to a shell script, Work with Special Parameters $*, [email protected], $$ etc

Deep dive into Linux Shell script, understanding the concept of loops, the various types of loops and integrators in Linux Shell script, learning about the condition handling mechanism.

Hands-on Exercise – Write a script using while loop to create a hierarchy if directory, Use if/else statements to execute different set of code

Learning about the String object, taking regular expressions as arguments, understanding how to redirect arguments as well as input and output using Shell Scripts, string manipulation using regular expressions, different types of Regex.

Hands-on Exercise – Create a String object,Take regular expression as arguments, Redirect input and output using Shell Scripts, Manipulate a string using regular expressions

Introduction to Shell Script functions, basic functions, creation of library of functions, learning about advanced Shell Script commands, expansions and built-in commands, real world examples of Shell Scripting.

Hands-on Exercise – Use in-built shell script functions, Create a library of functions

Shell scripting examples in the real world – understanding about shell scripting, Backup Script for Code & Mysql DB, checking service status, disk usage, highest CPU usage, automatic users addition, calculating free and used memory, remote host and port checking, shell script to sync directories, sending email on login and logout.

Hands-on Exercise – Write a backup script for Code & Mysql DB, Check service status, Check disk usage using a script, Find out highest CPU usage, Create a script automatic users addition, Calculate free and used memory, Check a remote host and port, Use a script to send email on login and logout

Introduction to Linux, Basics of Shell, Basics of Kernel, CentOS 8 installation and VBox additions, Basic Linux Commands, ECHO and EXPR command, Set and unset a variable, Header of a shell script (#!).

Hands-on Exercise – Executing basic Linux commands, Installing CentOS 8 on VirtualBox and adding guest additions to the installed OS.

Text editors and file creation; Users, Groups and Processes; Root and Linux file hierarchy, Understanding file hierarchy, Understanding file permissions, chmod and chown commands, the LS command, Metacharacters, Editing a file using VIM, Displaying contents of a file, Copy, Move and Remove files.

Hands-on Exercise – Using VIM, Creating users and groups, Creating files and directories, Assigning file permissions and ownership using chmod and chown, Editing files in VIM.

Everything is a file in UNIX/Linux (files, directories, executables, processes), Process control commands (ps and kill), other process control tools (top, nice, renice).

Hands-on Exercise – Executing ps and kill commands on running services, Monitoring the OS using top.

What is shell scripting, Types of shell, Creating and writing a shell script, Changing the permission of the shell script, Executing the script, Environment variables, Defining a local and a global variable, User input in a shell script.

Hands-on Exercise – Creating a shell script, Writing and executing the shell script, creating a local and a global variable, taking input from the user in a shell script.

What are Conditional statements, Using IF, IF-ELSE, Nested IF statements, What are Looping statements, Using WHILE, UNTIL and FOR statements, Using the case…esac statement, What is a Function, Creating a function in Linux, Calling functions.

Hands-on Exercise – Executing IF, IF-ELSE, Nested IF statements, Executing WHILE, UNTIL and FOR statements, Executing the case…..esac statement, creating a function in multiple ways, calling a function in a file, calling a function from another file.

Using GREP command, Using SED command, Using AWK command, Mounting a file to the virtual box, Creating a shared folder (mounting a folder), Using SORT command and Using pipes to combine multiple Commands.

Hands-on Exercise – Executing commands using GREP, Executing commands using SED, Executing commands using AWK, Mounting a folder in the Windows OS to the Linux OS, Installing VirtualBox guest additions on CentOS 8, Extracting zipped files.

What are Daemons, Introduction to Task scheduling in Linux, Scheduling a job in Linux, What is Cron and Crontab, How to use cron, Using the AT command.

Hands-on Exercise – Starting, Stopping and Restarting Daemon processes, Scheduling jobs using cron and crontab, Scheduling a one time task using AT, Managing scheduled tasks using ATQ and ATRM.

Why monitoring, Introduction to process monitoring, Top vs HTop, What does PGREP do, Introduction to file and folder monitoring, Monitoring tool inotifywait, inotifywait options for folder monitoring, Events of a folder in inotify, the FREE command.

Hands-on Exercise – Using Top to moniter the OS, Installing Htop, Using Htop to monitor the OS, Filtering and sorting using Htop, Installing inotify tools, monitoring a folder using inotifywait, monitoring a folder only for certaing events, using the FREE command.

Installing and configuring MySQL, Securing MySQL, Running Queries from terminal, Running Queries from a shell script.

Hands-on Exercise – Downloading and installing MySQL, Connecting to MySQL from terminal, Querying directly from the terminal, Pushing the query result inside a file, CRUD operations from a shell script.

What is networking in Linux, Why do we need networking, Using networking commands – IFCONFIG, PING, Wget and cURL, SSH, SCP and FTP, Learning Firewall tools – iptables and firewalld, DNS and Resolving IP address, /etc/hosts and /etc/hostname, nslookup and dig.

Hands-on Exercise – Executing all the networking commands, Using iptables and firewalld, Adding and removing ports, Resolving IP address in /etc/hosts, looking into a websites IP and nameservers using nslookup and dig.

Multiple Linux installations, automated installation using Kick start, deploying it using web server, installation media and Kick start configuration files.

Linux Package which is Pre-built set of programs, installation of Packages, its libraries and the dependencies, understanding the low-level and high-levels tools needed, configuring Linux Yum Server, understanding the Yum repository Server-Client system.

Deep dive into Linux Services, the important system files, utilities, directories.

Learning about SystemD, the Linux-specific system and service manager, understanding what are the programs that run when Linux loads, familiarising with the systemctl commands.

Linux user management, groups, attributes and file permissions, granting permission based on tasks to be performed, various advanced user administration features, setting user and group disk space quotas, Linux file system quotas.