RH134 - ch13s08

Preface A: Introduction

Section A.1: Orientation to the Classroom Lab Environment

Chapter 1: Automating Installation with Kickstart

Section 1.1: Defining the Anaconda Kickstart System

Section 1.2: Quiz: Practice: Kickstart File Syntax and Modification

Section 1.3: Deploying a New Virtual System with Kickstart

Section 1.4: Guided Exercise: Practice: Installing a System Using Kickstart

Section 1.5: Quiz: Chapter Automating Installation with Kickstart

Chapter 2: Using Regular Expressions with grep

Section 2.1: Regular Expressions Fundamentals

Section 2.2: Quiz: Practice: Match the Regular Expression

Section 2.3: Matching Text with grep

Section 2.4: Guided Exercise: Practice: Using grep with Logs

Section 2.5: Lab: Lab: Using Regular Expressions with grep

Chapter 3: Creating and Editing Text Files with vim

Section 3.1: The vim Text Editor

Section 3.2: Quiz: Practice: vim Modes

Section 3.3: Basic vim Workflow

Section 3.4: Guided Exercise: Practice: Basic vim Workflow

Section 3.5: Editing with vim

Section 3.6: Guided Exercise: Practice: Edit a File with vim

Section 3.7: Lab: Lab: Edit a System File with vim

Chapter 4: Scheduling Future Linux Tasks

Section 4.1: Scheduling One-Time Tasks with at

Section 4.2: Guided Exercise: Practice: Scheduling One-Time Tasks with at

Section 4.3: Scheduling Recurring Jobs with cron

Section 4.4: Guided Exercise: Practice: Scheduling Recurring Jobs with cron

Section 4.5: Scheduling System cron Jobs

Section 4.6: Guided Exercise: Practice: Scheduling System cron Jobs

Section 4.7: Managing Temporary Files

Section 4.8: Guided Exercise: Practice: Managing Temporary Files

Section 4.9: Quiz: Chapter Scheduling Future Linux Tasks

Chapter 5: Managing Priority of Linux Processes

Section 5.1: Process Priority and "nice" Concepts

Section 5.2: Quiz: Practice: Process Priority and "nice" Concepts

Section 5.3: Using nice and renice to Influence Process Priority

Section 5.4: Guided Exercise: Practice: Discovering Process Priorities

Section 5.5: Lab: Lab: Managing Priority of Linux Processes

Chapter 6: Controlling Access to Files with Access Control Lists (ACLs)

Section 6.1: POSIX Access Control Lists (ACLs)

Section 6.2: Quiz: Practice: Interpret ACLs

Section 6.3: Securing Files with ACLs

Section 6.4: Guided Exercise: Practice: Using ACLs to Grant and Limit Access

Section 6.5: Lab: Lab: Controlling Access to Files with Access Control Lists (ACLs)

Chapter 7: Managing SELinux Security

Section 7.1: Enabling and Monitoring Security Enhanced Linux (SELinux)

Section 7.2: Quiz: Practice: SELinux Concepts

Section 7.3: Changing SELinux Modes

Section 7.4: Guided Exercise: Practice: Changing SELinux Modes

Section 7.5: Changing SELinux Contexts

Section 7.6: Guided Exercise: Practice: Changing SELinux Contexts

Section 7.7: Changing SELinux Booleans

Section 7.8: Guided Exercise: Practice: Changing SELinux Booleans

Section 7.9: Troubleshooting SELinux

Section 7.10: Guided Exercise: Practice: Troubleshooting SELinux

Section 7.11: Lab: Lab: Managing SELinux Security

Chapter 8: Connecting to Network-defined Users and Groups

Section 8.1: Using Identity Management Services

Section 8.2: Guided Exercise: Practice: Connecting to a Central LDAP and Kerberos Server

Section 8.3: Lab: Lab: Connecting to Network-defined Users and Groups

Chapter 9: Adding Disks, Partitions, and File Systems to a Linux System

Section 9.1: Adding Partitions, File Systems, and Persistent Mounts

Section 9.2: Guided Exercise: Practice: Adding Partitions, File Systems, and Persistent Mounts

Section 9.3: Managing Swap Space

Section 9.4: Guided Exercise: Practice: Adding and Enabling Swap Space

Section 9.5: Lab: Lab: Adding Disks, Partitions, and File Systems to a Linux System

Chapter 10: Managing Logical Volume Management (LVM) Storage

Section 10.1: Logical Volume Management Concepts

Section 10.2: Quiz: Practice: Logical Volume Management Concepts

Section 10.3: Managing Logical Volumes

Section 10.4: Guided Exercise: Practice: Adding a Logical Volume

Section 10.5: Extending Logical Volumes

Section 10.6: Guided Exercise: Practice: Extending a Logical Volume

Section 10.7: Lab: Lab: Managing Logical Volume Management (LVM) Storage

Chapter 11: Accessing Network Storage with Network File System (NFS)

Section 11.1: Mounting Network Storage with NFS

Section 11.2: Guided Exercise: Practice: Mounting and Unmounting NFS

Section 11.3: Automounting Network Storage with NFS

Section 11.4: Guided Exercise: Practice: Automounting NFS

Section 11.5: Lab: Lab: Accessing Network Storage with Network File System (NFS)

Chapter 12: Accessing Network Storage with SMB

Section 12.1: Accessing Network Storage with SMB

Section 12.2: Guided Exercise: Practice: Mounting a SMB File System

Section 12.3: Lab: Lab: Accessing Network Storage with SMB

Chapter 13: Controlling and Troubleshooting the Red Hat Enterprise Linux Boot Process

Section 13.1: The Red Hat Enterprise Linux Boot Process

Section 13.2: Guided Exercise: Practice: Selecting a Boot Target

Section 13.3: Repairing Common Boot Issues

Section 13.4: Guided Exercise: Practice: Resetting a Lost root Password

Section 13.5: Repairing File System Issues at Boot

Section 13.6: Guided Exercise: Practice: Repairing Boot Problems

Section 13.7: Repairing Boot Loader Issues

SectionSection 13.8: Guided Exercise: Practice: Repairing a Boot Loader Problem

Section 13.9: Quiz: Chapter Controlling and Troubleshooting the Red Hat Enterprise Linux Boot Process

Chapter 14: Limiting Network Communication with firewalld

Section 14.1: Limiting Network Communication

Section 14.2: Guided Exercise: Practice: Limiting Network Communication

Section 14.3: Lab: Lab: Limiting Network Communication

Chapter 15: Comprehensive Review of System Administration II

Section 15.1: Red Hat System Administration II Comprehensive Review

Section 15.2: Lab: Lab: Comprehensive Review of System Administration II

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Guided Exercise: Practice: Repairing a Boot Loader Problem

In this lab, you will repair an issue with the boot loader configuration on one of your machines.

Resources:
Machines:	`serverX`

Outcomes:

A machine that boots normally without user intervention.

Reset your serverX system.

[student@serverX ~]$ lab bootbreakgrub setup

One of your former co-workers was experimenting with speeding up the boot process on one of your machines. After a number of failed attempts, you have now been tasked with repairing the damage done.

Look at the console of your serverX machine, then reboot the machine and interrupt the boot loader countdown timer.
1. Send a Ctrl+Alt+Del to your system using the relevant button or menu entry.
2. When the boot loader menu appears, press any key to interrupt the countdown.
Move the cursor to the default boot entry, then press e to edit that entry. Inspect the configuration closely, looking for anything that seems out of the ordinary.
Find the line that is blocking the boot process, modify it, then boot with these changes.
1. os16 is not a valid grub directive. Change it to linux16.
2. Press Ctrl+x to boot your system with the modified configuration.
Wait for the system to boot, log in as student, elevate your privileges to root, then generate a new grub2 configuration. Do not immediately overwrite the existing configuration, but inspect the new config first.
1. ```
[student@serverX ~]$ sudo -i
[root@serverX ~]# grub2-mkconfig
```
2. Scroll through the output to see if it looks like a valid grub2 configuration.
3. Commit the configuration to disk.
```
[root@serverX ~]# grub2-mkconfig > /boot/grub2/grub.cfg
```
Reboot your machine, and check if it boots normally again without user intervention.
1. ```
[root@serverX ~]# systemctl reboot
```

Discuss Red Hat System Administration II

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Is It possible to reset root password when the system is on multi-user.target?

jennifer1987

27 lip 2023

Hi thereWell, i have a question, Is It possible to reset root password when the system is on multi-user.target? I was not be able to found a foro o some information related with this and another question that I have, If the grub menu dont show up, is it posible to reset the root password?

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Red Hat System Administration II (RH134)

Haley_Ruccio

21 lip 2023

Build the skills to perform the key tasks needed to become a full-time Linux administratorRed Hat System Administration II (RH134) is the second part of the RHCSA training track for IT professionals who have already attended Red Hat System Administration I. The course goes deeper into core Linux system administration skills in storage configuration and management, installation and deployment of Red Hat Enterprise Linux, management of security features such as SELinux, control of recurring system tasks, management of the boot process and troubleshooting, basic system tuning, and command-line automation and productivity. This course assumes that students have attended Red Hat System Administration I (RH124).Experienced Linux administrators who seek rapid preparation for the RHCSA certification should instead start with RHCSA Rapid Track (RH199).This course is based on Red Hat Enterprise Linux 9.0.Course summaryInstall Red Hat Enterprise Linux using scalable methodsAccess security files, file systems, and networksExecute shell scripting and automation techniquesManage storage devices, logical volumes, and file systemsManage security and system accessControl the boot process and system servicesRun containersAudience for this courseThis course is geared toward Windows system administrators, network administrators, and other system administrators who are interested in supplementing current skills or backstopping other team members, in addition to Linux system administrators who are responsible for these tasks:Configuring, installing, upgrading, and maintaining Linux systems using established standards and proceduresProviding operational supportManaging systems for monitoring system performance and availabilityWriting and deploying scripts for task automation and system administrationRecommended trainingSuccessful completion of Red Hat System Administration I (RH124) is recommended.Experienced Linux administrators seeking to accelerate their path toward becoming a Red Hat Certified System Administrator should start with the RHCSA Rapid Track course (RH199).Take our free assessment to gauge whether this offering is the best fit for your skills.Technology considerationsThere are no special technology requirements.This course is not designed for bring your own device (BYOD).Internet access is not required, but is recommended to allow students to research and access Red Hat online resources.

Welcome to the Red Hat System Administration II (RH134) group in the Red Hat Learning Community!

Deanna

18 lip 2023

We are excited to launch a space dedicated to the Red Hat Training course Red Hat System Administration II! To gain the most value from this group - click the "Join Group" button in the upper right hand corner.We encourage group members to collaborate in this group to discuss topics, ask questions, share best practices and tips, provide course feedback, and share their accomplishments as it relates to RH134.Read more about Red Hat System Administration II here.

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Revision: rh134-7-63a207e