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Linux Administration with Troubleshooting Skills - Hands On
USD 16,00
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Sobre este Curso

Sobre este Curso

By the end of the course you will:

Be able to confidently use the Linux operating system to increase your productivity and Career.

Be able to perform everyday computing tasks from the Linux command line.

Course Content

  Linux basic concepts,Introduction & History of Unix/Linux                                              

Introduction to Unix

History of UNIX  

What is LINUX 

History of Linux 

LINUX Distributions  

Unix File System

Linux Commands Tutorials

Lecture on various commands with proper explanation with examples on live environment.

Overview of File System Structure

pwd, cd, ls, less, cp, file mkdir. more. mv, cat, rm rmdir, wc, dd, head, tail, touch, ln etc

Bash profile, Variables & Standard Input output Redirecting

User’s home directory

.bash_profile, .bashrc & .bash_logout

How to set PATH & alias in .bashrc profile

Familiar with Variables

Bash variable, Environmental variable & System Variables

Lab

Standard Input & Output Redirecting ( > , 2> ,&> )

Standard Input and Output

Redirecting Output to a File 

Redirecting Output to a File

Lab

Linux User management

Understanding different types of groups and creation of groups

Creation of users in different groups

Understanding Passwd, Shadow Files

Understanding passwd aging

Creation of quotas for users, groups and file systems

Understanding users security files

password aging policy using chage commands

TROUBLESHOOTING

Permissions in Red Hat Linux

Basic File Permissions

User Based permissions groups 

Permission Types

Change of permissions & ownership 

Special Permissions  

Setuid, Setguid, Sticky bit, ACL etc

Two Labs to demonstrate the permissions from real IT industry environment.

Controlling Access to files with ACLs

Access Control List Concepts

Set ACL’s on files

Default ACL

Practice Lab Session on set acl on files

Practice Lab Session on set acl on directories

Practice Lab Session on mask to limit the set of permissions

Practice Lab Session on default ACL

Practice Exercise - Scenario based activity

Linux Crontab

Overview of Linux Crontab & its format

Schedule a job for a specific period of time 

Schedule a job for more then one instance (e.g. twice a day)

Schedule a job for specific range of time

Schedule a job every weekday during working hours

how to view crontab entries?

Schedule a job for every minute using cron

Linux Find Commands

Basic find commands for finding files with names

Find files based on their permissions

Search files based on owners & groups

Find files and directories based on date & time

Find files and directories based on size

OpenSSH         

Overview of OpenSSH

What Are Some Of The OpenSSH Features?

OpenSSH options are controlled through the /etc/ssh/sshd_config file

Lab Session

Telnet 

Overview about telnet

Configuration of telnet server on Linux

Xinetd Service

Process Management

Understanding ps commands with custom properties & Nice values etc

Different stats of a process like “D”, “S”, “T”, “Z” etc

Kill commands to terminate the process

Lab

Kernel Modules

What is Kernel & its features

Kernel Modules

Commands to manipulate the kernel (insmod,lsmod,modinfo,modprobe &rmmod)

How to know the name of the module or kernel driver for any deivce like lan

Lab

Disk Partitions, File Systems Creations & RAID Configuration

Creating the partitions in a simple disk using fdisk

Understanding the different options in fdisk utility

Creating File Sytems using (ext3/ext4/xfs FS)

Mounting/Umounting FS

Entry in fstab

Introduction to RAID

Concepts & features of RAID

RAID Level

How to configure different level of Raids like (0,1,5,6, 10 etc)

Lab Sessions

Logical Volume Manager Administration

LVM Architecture Overview

LVM Components

LVM Logical Volumes

Logical Volume Creation Overview

Growing a File System on a Logical Volume

Logical Volume Backup

LVM Administration with CLI Commands

Using CLI Commands

Physical Volume Administration

Creating Physical Volumes

Displaying Physical Volumes

Preventing Allocation on a Physical Volume

Resizing a Physical Volume

Removing Physical Volumes

Volume Group Administration

Creating Volume Groups

Adding Physical Volumes to a Volume Group

Displaying Volume Groups

Removing Physical Volumes from a Volume Group

Changing the Parameters of a Volume Group 

Activating and Deactivating Volume Groups 

Removing Volume Groups

Overview about LVM Metadata

Metadata Contents

How to identify and  recover failed LVM disk

  RPM (Red Hat Package Manager) 

Install : It is used to install any RPM package.

Remove : It is used to erase, remove or un-install any RPM package.

Upgrade : It is used to update the existing RPM package.

Verify : It is used to query about different RPM packages.

Query : It is used for the verification of any RPM package.

YUM (Yellowdog Updater, Modified)

Overview of YUM

Configuration& and installation of yum on Red Hat Linux Server

Lab-1

Lab-2

Yum History Command

Reverting and Repeating Transactions like undo & redo using yum command

Linux OS Minor Upgrade

Linux OS upgrade from RHEL 7.1 to RHEL 7.2

Lab Practice Sessions

File Transfer Protocol

Overview of FTP Server

Installation and configuration of FTP Server

Lab-1

Lab-2

Apache Web Server Administration

Basic Setup

Verify installation

Package files

Main configuration file(s)

Backup

Edit the httpd.conf configuration file

ServerRoot

PidFile

ServerName

Add site to /etc/hosts file

DocumentRoot

ErrorLog

Listen

Create your HTML documents

Start the Web Server

Access the web site

Local access

Internal & external access

Summary of basic setup

DNS (Domain Name System)

Overview of DNS

Understanding root & top level domains

How dns works practically

What happens when I type any website name in the address bar of the browser

Samba Server

Overview of Samba Server

Features of Samba Server

How Samba Server Works

Samba File sharing Server

CIFS File System

Practice Lab Sessions

Network File System  (NFS) on Linux

Overview of NFS Server

Installation and configuration of NFS Server

Lab-1

Lab-2

Automating Installation using Kickstart

Overview of Kickstart Server

Features of Kickstart Server

Configuration & Installation of Kickstart Server

Configuration of dhcp, tftpd, nfs for Kickstart Server

Configuration of kickstart config file using graphical mode

PXE Boot Environment

Lab Session

Unattended Client boot and do the installation via network

Networking Concepts in Linux

New Sets of commands introduced in RHEL 7 for managing the network interfaces.

Check the status of ethernet interfaces

Add and configure the new ethernet interface

Activate the network services

Commands to change the network properties of an existing interface

Delete the ethernet interface

Learning of various new commands related to managing network interfaces.

Overview of Routing Table

Understanding the output of netstat -rn or route -n output

Lab

Linux Performance Monitoring

Introduction about Performance monitoring in Linux

Important four subsystems that needs to be monitored.

  1. CPU 
  2. Memory
  3. I/O
  4. Network

Familiar & understanding with CPU Utilization

Like Context switches, Run Queue, CPU utilization & Load Average

Familiar & understanding with Memory Utilization

Familiar & understanding with I/O Analyses

Familiar & understanding with Network Monitoring

Familiar with various Commands to manage performance issues in Linux Servers

top 

vmstat

Troubleshooting Linux Boot Problems in Red Hat Linux 6 (Basic System Recovery)

Simple & step by step understanding of Linux Boot Process ( 2 detailed Sessions)

Overview of Red Hat Linux 7 and their features

Comparison of features of RHEL7 with RHEL6

Lab on Basic System Recovery (Initramfs file missing/Corrupted)

Lab on Basic System Recovery (Grub related issues like stage 1.5/2 grub is missing)-Part1

Lab on Basic System Recovery (Grub related issues like stage 1.5/2 grub is missing)-Part2

Lab on Basic System Recovery (Master Boot Record missing/corrupted)

Lab on Basic System Recovery (Critical files are missing like mount binary, incorrect entry in fstab etc)

Lab on Basic System Recovery (Critical files are missing like mount binary, incorrect entry in fstab etc)

Overview of Red Hat Enterprise Linux 7

Overview about RHEL7 with its new features

Comparison with RHEL 6

Lab on systemd service (Familiar with different systemd targets & new commands)

Rescue mode in RHEL 7

Lab on rescue mode

Emergency mode in RHEL 7

Lab on emergency mode

Troubleshooting mode (Overview and Lab)

Lab on Recovering the Root password in RHEL7

Resetting the Root Password Using an Installation Disk 

Resetting the Root Password Using rd.break

Troubleshooting Linux Boot Problems in Red Hat Linux 7 (Basic System Recovery)

Lab on Basic System Recovery (Initramfs file missing/Corrupted)

Lab on Basic System Recovery (Grub related issues

Lab on Basic System Recovery (Master Boot Record missing/corrupted)

Lab on Basic System Recovery (Critical files are missing like mount binary, incorrect entry in fstab etc)

GRand Unified BootLoader (Grub2)

Overview of Grub

Grub Configuration file

Features of Grub2 and its comparison with Legacy Grub

Practical Lab Session - Different commands to run at Grub2 prompt

Practical Lab Session - Boot from Grub (Selecting Kernel & Initramfs)

Practical Lab Session - How to make your grub password protected

Kdump configuration on RHEL 7

Overview of kdump

How to enable Kdump on RHEL 7

Lab Session

Red Hat Satellite 6.2

Overview of Satellite Server

Pre-Requisites (What needs to be done before initiating the Red Hat Satellite Server installation)

Registering the server using subscription manager

Installing the Satellite Server Packages & updating the Server

Installing satellite from the Offline Repositories.

Initial Configuration for the satellite server

Registering Satellite 

Downloading/Uploading manifest (Importing manifest to Installed Satellite server)

Attaching a subscription

Create Red Hat Repo’s as per the enviornment requirement

Creating Activation

Registering server (Red Hat Satellite client)

Recap

Managing SELinux Security

Introduction - SELinux

SELinux Security Concepts

Changing SELinux Modes

Practice Lab Sessions

Changing SELinux Contexts

SELinux Booleans

Audit logs & troubleshooting SELinux

Backup and Restore

Overview of Backup

Various commands for backup

Types of backup

Full backup, Incremental backup and differential backup

dump command to take backup & restoration

Advanced Linux Commands

dig, nslookup, rsync, scp, ssh, sftp, find, grep, locate, df, du, lsof, ps, top, who,cut, sort, vi, sed, awk, tar, gzip, bzip2 etc

useradd, userdel, usermod, groupadd, groupdel, id, chage, chroot, chown etc

mount, umount, fdisk, mkfs, fsck,/proc, uptime etc

ping, nslookup, telnet, ifconfig, ifconfig-a, netstat -a etc

systemctl -at service, systemctl -t service –state=active, systemctl start name.service, systemctl enable name.service  etc

pvs, vgs, pvdisplay,lvs, lvdisplay, pvcreate, pvremove, vgcreate, vgrename, vgremove, vgextend, vgreduce, lvcreate, lvextend, lvreduce,fdisk, vgexport, vgimport, vgcfgrestore, vgcfgbakcup, watch, whoami, passwd, su etc

last lecture

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