Oracle Linux 7 System Administration

This lesson provides an overview of the course contents, the course schedule, the classroom environment and the technical environment.

Lesson Topics:

• Describe the classroom environment used for the practice sessions

• Practice:

• Start, log in to, and stop a virtual machine on your student desktop

• Exploring the dom0 Environment

• Exploring the host02 VM

• Starting, Stopping, and Listing Guests

• Logging Off from Your Student PC

• Exploring the host01 VM

This lesson provides an overview of the history of the Linux operating system and Oracle’s implementation thereof.

Lesson Topics:

• The history of the Linux operating system

• Oracle Linux’s compatibility with Red Hat Enterprise Linux (RHEL)

• The Linux kernel development model

• Unbreakable Enterprise Kernel

• Linux distributions

• Practice:

• Oracle’s comprehensive Linux solution

• Quiz – Introduction to Oracle Linux

• Oracle’s contributions to the Linux community

• Viewing Kernel Information

The objective of this lesson is simply for you to become familiar with the Oracle Linux installation process.

Lesson Topics:

• Obtain Oracle Linux 7 operating system software

• Practice:

• Describe the Anaconda installer

• Installing Oracle Linux

• Install Oracle Linux

• Completing Initial Setup and FirstBoot

• Describe the FirstBoot utility

• Logging in to Oracle Linux and Shutting Down

• Re-Creating the host03 VM Guest

This lesson provides an overview of the Linux boot processes.

Lesson Topics:

• Describe the Oracle Linux 7 boot process

• Practice:

• Describe and configure the GRUB 2 bootloader

• Explore the GRUB 2 boot loader

• Describe and configure kernel boot parameters

• Edit the GRUB 2 configuration file to boot different kernels

• Describe the systemd system and service manager

• Boot the rescue kernel to repair the initial RAM disk image

• Describe systemd service units

• Use the GRUB 2 menu to modify kernel boot parameters

• Configure services

• View systemd units

• Describe systemd target units

• View target units

• Configure Rescue Mode and Emergency Mode

• View the default target unit

• Perform shutdown, suspend, and reboot operations

• Change the default target unit

• Configure a service to start and stop at a specific target state

• View service units

This lesson explores file systems, system utilities and ways of configuring the operating system.

Lesson Topics:

• System date and time configuration

• Practice:

• Configuring NTP and chrony

• Configuring Date and Time

• The /etc/sysconfig directory

• Configuring NTP and Chrony

• The proc file system

• Exploring /etc/sysconfig

• The sysfs file system

• Exploring /proc

• The sysctl utility

• Exploring the sysfs File System

• Using sysctl

This lesson describes how to maintain software packages through the use of RPM (Red Hat Package Manager) and Oracle’s public yum server.

Lesson Topics:

• Describe Oracle Linux package management

• Describe the steps to switch from RHN to ULN

• Use the rpm utility

• Practice:

• Describe the Oracle public yum server

• Using the rpm Utility

• Describe and configure yum repositories

• Access public yum servers

• Use the yum utility

• Creating a Local Yum Repository

• Describe the Unbreakable Linux Network (ULN)

• Using the yum Utility

• Unbreakable Linux Network (ULN)

This lesson describes the features and usage of Oracle’s ksplice update utility.

Lesson Topics:

• Describe the purpose of Ksplice

• Use Ksplice Offline Client

• Describe how Ksplice works

• Practice:

• Describe Ksplice implementation steps

• View the Ksplice Offline Client Packages from the Unbreakable Linux Network (ULN)

• View Ksplice packages on ULN

• Upload the Ksplice packages from dom0 to the host03 VM

• Use Ksplice Uptrack commands

• Install the Ksplice Offline Client and Kernel Updates to host03

• Use the Ksplice web interface

• View the effective kernel version after updates are applied

• List the active Oracle Ksplice updates in your running kernel

This lesson describes how to make use of the automated task utilities.

Lesson Topics:

• Describe available automated tasks utilities

• Configure anacron jobs

• Configure cron jobs

• Use at and batch utilities

• Describe cron directories and files

• Practice:

• Use the crontab utility

• Automating Tasks

This lesson describes how to manage dynamically loaded kernel modules.

Lesson Topics:

• Describe loadable kernel modules

• Configure kernel module parameters

• Dynamically load and unload kernel modules

• Practice:

• Using Loadable Kernel Modules

This lesson describes the techniques involved in managing users and groups.

Lesson Topics:

• Describe user and group implementation

• Describe user and group implementation in the enterprise

• Describe user and group configuration files

• Practice:

• Configure users and groups by using commandline utilities

• Create user and group accounts

• Implement user private groups (UPG)

• Understand the benefits of user private groups

• Configure password aging and the hashing algorithm

• Configure password aging

• Use the User Manager GUI tool

• Use the User Manager GUI

• Manage the use of su and sudo commands

• Restrict the use of the su command

• Allow the use of the sudo command

This lesson describes the use of file systems and the implementation of disk partitions.

Lesson Topics:

• Describe disk partitioning

• Describe and maintain swap space

• Use disk partitioning utilities

• Practice:

• Describe supported file system types

• Display the partition table, list the mounted file systems, and display the swap space configured during installation

• Describe file system creation, mounting, and maintenance

• Partition disk devices, and create and mount file systems on the partitions

• Increase the amount of swap space by creating a swap file

This lesson describes the implementation of XFS file system for Oracle Linux.

Lesson Topics:

• Describe XFS for Oracle Linux

• Use the xfsdump and xfsrestore utilities

• Create an XFS file system

• Use XFS file system maintenance utilities

• Use the xfs_growfs utility

• Practice:

• Use the xfs_admin utility

• Create and mount an XFS file system

• Enable disk quotas on an XFS file system

• Set quotas on an XFS file system

• Use the xfs_quota utility

• Back-up and restore an XFS file system

• Set project quotas

This lesson describes the implementation and configuration of the open-source Btrfs file system.

Lesson Topics:

• Describe the features of the Btrfs file system

• Practice:

• Create a Btrfs file system

• Verify that the btrfs-progs package is installed

• Create Btrfs subvolumes and snapshots

• Create Btrfs file systems

• Take a snapshot of a file in a Btrfs subvolume

• Resize a Btrfs file system

• Mount Btrfs subvolumes and snapshots

• Create and mount Btrfs subvolumes and snapshots

• Defragment and resize a Btrfs file system

• Take a snapshot of a file in a Btrfs subvolume

• Add and remove devices in a Btrfs file system

• Recover a corrupted Btrfs file system

• Check and repair the integrity of a Btrfs file system

• Convert ext file systems to Btrfs

This lesson describes the techniques involved in administrating storage through the use of various storage management tools.

Lesson Topics:

• Describe the Linux device mapper

• Practice:

• Describe Logical Volume Manager (LVM)

• Creating Linux LVM Partitions

• Configure LVM components

• Creating a Logical Volume

• Back-up and restore volume group metadata

• Creating a File System and Mounting a Logical Volume

• Describe Linux kernel multi-disk (MD) driver

• Backing Up Volume Group Metadata

• Describe RAID and configure RAID devices

• Creating a Logical Volume Snapshot

• Restoring Volume Group Metadata

• Increasing the Capacity of a Logical Volume

• Creating a RAID Device

This lesson describes how to configure the network environment.

Lesson Topics:

• Describe network interface configuration files

• Practice:

• Describe additional network configuration files

• Configure the eth1 network interface by editing network interface configuration files

• Start the network service

• Use NetworkManager with the GNOME GUI to configure network interfaces

• Use the ethtool utility

• Use the Network Connection editor to configure networking properties

• Describe NetworkManager

• Use the nmcli utility to configure networking properties

• Use the NetworkManager GUI

• Use the nmtui text-based utility to configure network interfaces

• Use the Network Connections Editor

• Use the ip utility to manage network links, addresses, and the ARP cache

• Use the nmtui utility

• Use the ip utility

• Describe ARP and the ARP cache

This lesson describes the methods and utilities involved in sharing files.

Lesson Topics:

• Describe NFS

• Describe and configure vsftpd

• Configure NFS server and client

• Practice:

• Describe the exportfs utility

• Configure an NFS server and client and mount an exported file system

• Describe and configure automounter

• Use automounter to mount the virtual CD drive

• Configure and use an FTP server

This lesson describes the use of the OpenSSH (Secure Shell) network connectivity tools.

Lesson Topics:

• Describe OpenSSH

• Use ssh-agent and sshadd

• Describe OpenSSH configuration files

• Practice:

• Configure OpenSSH server and client

• You verify that the OpenSSH packages are installed and that the sshd service is running

• Use the ssh command

• You use the ssh and scp utilities

• Use the scp command

• You use the ssh-keygen utility to generate keys enabling connectivity without supplying a password

• Use the sftp command

• Use the ssh-keygen command

This lesson covers several methods that can be used in securing your computer system.

Lesson Topics:

• Describe the chroot jail

• Describe TCP wrappers

• Use the chroot utility

• Configure TCP wrappers

• Describe iptables

• Practice:

• Use the Firewall Configuration Tool

• Create chroot jails

• Describe iptables tables, chains, rules, and targets

• Configure iptables from the GUI and the command line

• Use the iptables utility

• Configure a TCP wrapper

This lesson describes how to configure Oracle Linux for Oracle Database.

Lesson Topics:

• Prepare your Oracle Linux server for Oracle Database installation

• Use Oracle pre-install RPM

• Create Oracle software user and group accounts

• Install and use ASMLib

• Set kernel parameters for Oracle Database

• Practice:

• Set Oracle database shell limits

• Using sftp to Upload oracle-rdbms-server Package

• Configure HugePages

• Installing and Running Oracle RDBMS Pre-Install

• Configure Oracle Database Smart Flash Cache (DBSFC)

• Preparing Disks for ASM Use

• Installing and Configuring ASMLib

This lesson describes the use of various tools and utilities for monitoring the Oracle Linux system. Lesson Topics:

• Use the sosreport utility

• Describe Enterprise Manager Ops Center

• Use the iostat, mpstat, vmstat, sar, top, iotop, and strace utilities

• Describe Linux Patch and Provisioning using Enterprise Manager Ops Center

• Use the netstat and tcpdump utilities

• Describe Spacewalk

• Use the Wireshark network analyzer GUI

• Practice:

• Use the OSWatcher Black Box (OSWbb) tool

• Use the sosreport utility to collect system information

• Use OSWatcher Black Box Analyzer (OSWbba)

• Use standard Linux utilities to monitor system resource usage

• Use OSWatcher Black Box and OSWatcher Black Box Analyzer

This lesson provides an overview of how to configure and enable system logging.

Lesson Topics:

• Describe Oracle Linux 7 system logging options

• Describe logwatch

• Describe the contents of the rsyslog configuration file

• Describe journald

• Describe rsyslog filter options

• Use the journalctl utility

• Describe facility/prioritybased filters

• Practice:

• Describe rsyslog actions

• Configuring System Logging

• Describe rsyslog templates

• Using rsyslog Templates

• Configure log rotation

• Using logwatch

• Using journald

This lesson describes the methods and techniques involved in troubleshooting an Oracle Linux system.

Lesson Topics:

• Describe the two-phased approach to troubleshooting

• Practice:

• Describe the type of information needed to troubleshoot a problem

• Transferring Utilities from dom0

• Describe the available operating system logs to assist in troubleshooting

• System Boots into SingleUser Mode

• Use the dmesg utility

• Status Commands Fail

• Describe the available troubleshooting resources

• cron Job Fails to Run

• Describe causes of common problems

• User Cannot Log In

• Describe troubleshooting boot problems

• File System Troubleshooting

• Describe typical causes of NFS problems

• Logical Volume Space is Exhausted

• Remote Access Problem

• Network Connectivity Problem

• Log File Is Not Getting Updated

• NFS Permission Problem