CentOS 7 Administration I

Overview

This course presents the basic working environment of a Linux system. It introduces commonly required operations that can be performed by entering commands interactively in a command terminal, along with functions available in the GNOME Desktop Environment . This course will concentrate on Community Enterprise Operating System (CentOS), version 7 (all update levels).

Prerequisites

This course is considered to be the basic CentOS course. Experience with any interactive system is helpful.

Course duration

This course normally requires five (5) days, approximately 50% lecture and 50% lab time.

Course Objectives

Each participant will be able to use CentOS 7 Bash Shell techniques and commands to maintain collections of files, create files using interactive editor utilities, create and execute basic command procedures, communicate with other users, and tailor the interactive environment to meet their needs. Basic administrative features to setup a functioning CentOS 7 system will also be shown.

Course outline

Understanding the User Environment

CentOS 7 system overview
process concepts
the graphical environment (GNOME)

Getting Started with the Command Language

logging into an CentOS 7 system
Bash shell syntax rules
documentation via man, info and pinfo
command line editing and history control
shortcut control keys

Configure Secure Communications with OpenSSH

utilities that support a trusted environment
rsh, rlogin, rcp

required packages and services
.rhosts file

defining ssh keys

setup on client and server systems

Managing Files

file specification syntax
device specifications
directory specifications
regular expressions and special characters
CentOS 7 commands to manipulate files
file permission mechanisms
Creating and Editing Text Files
command line utilities to control file (content)

Creating and Editing Text Files

command line utilities to control file (content)
vim editor

key operations
importance of .vimrc

Improving the User Interface

creating command aliases
redirection of input and output
using hard and symbolic links
process control commands

Monitor and Manage Linux Processes

obtaining system information
show process information and attributes
control process execution

background
daemon
signals (kill)

User Level Archival Operations

tar utility syntax
tar commands for product access
using compression/uncompression commands

gzip / gunzip

System Installation and Updating

installation types and methods
installing the CentOS 7 operating system
maintaining the system via patches
managing system software

package information (rpm, yum)
installing packages (rpm, yum)
removing packages (rpm, yum)
creating and using (yum) repositories

Startup and Shutdown

components involved in the Linux boot
GRUB loader stages and configuration

default bootstrap
boot to single-user mode

CentOS 7 startup methods, tools, and procedures
understanding systemd (daemons, files)
comparing systemd targets to run levels
systemctl and journald commands
adding services to the startup mechanisms
shutdown methods and control

Managing of System Users

UID and GID concepts
creation of a user account
security through password aging
controlling access by groups

Analyzing Logging Information

collection mechanism
configuring rsyslogd

rsyslog.conf

Monitoring System Activity

informational utilities

vmstat
iostat
mpstat
pidstat
top

contents of the /proc hierarchy files

Network Setup and Configuration

available tools

Network Manager
nmcli
nmtui, nmtui-edit

host names and related files
configuring network devices

Virtualization

available tools

virt-install
virt-manager
virsh

creating a kvm

controlling a kvm