Red Hat Enterprise Linux 8.0 (RH134) - Red Hat System Administration II

430 Pages·2019·15.511 MB·English

by  Fiona Allen et al.

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STUDENT WORKBOOK (ROLE)
Red Hat Enterprise Linux 8.0 RH134
RED HAT SYSTEM ADMINISTRATION II
Edition 1
RH134-RHEL8.0-en-1-20190531 Copyright ©2019 Red Hat, Inc.

RED HAT SYSTEM
ADMINISTRATION II
RH134-RHEL8.0-en-1-20190531 Copyright ©2019 Red Hat, Inc.
Red Hat Enterprise Linux 8.0 RH134
Red Hat System Administration II
Edition 1 20190531
Publication date 20190531
Authors: Fiona Allen, Adrian Andrade, Herve Quatremain, Victor Costea,
Snehangshu Karmakar, Marc Kesler, Saumik Paul
Editor: Philip Sweany, Ralph Rodriguez, David Sacco, Seth Kenlon, Heather
Charles
Copyright © 2019 Red Hat, Inc.
The contents of this course and all its modules and related materials, including handouts to audience members, are
Copyright © 2019 Red Hat, Inc.
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Contributors: Achyut Madhusudan, Rob Locke, Rudolf Kastl, Prashant Rastogi, Heider Souza,
Michael Phillips, Dallas Spohn
Document Conventions                                                                                                    ix
Introduction                                                                                                                     xi
Red Hat System Administration II ............................................................................... xi
Orientation to the Classroom Environment ................................................................. xii
Controlling Your Systems ................................................................................ xiii
Internationalization .................................................................................................. xv
1. Improving Command-line Productivity                                                                            1
Writing Simple Bash Scripts ....................................................................................... 2
Guided Exercise: Writing Simple Bash Scripts .............................................................. 6
Running Commands More Efficiently Using Loops ....................................................... 9
Guided Exercise: Running Commands More Efficiently Using Loops ............................... 15
Matching Text in Command Output with Regular Expressions ....................................... 17
Guided Exercise: Matching Text in Command Output with Regular Expressions ............... 26
Lab: Improving Command-line Productivity ............................................................... 29
Summary ............................................................................................................... 36
2. Scheduling Future Tasks                                                                                             37
Scheduling a Deferred User Job .............................................................................. 38
Guided Exercise: Scheduling a Deferred User Job ...................................................... 40
Scheduling Recurring User Jobs .............................................................................. 44
Guided Exercise: Scheduling Recurring User Jobs ...................................................... 47
Scheduling Recurring System Jobs .......................................................................... 50
Guided Exercise: Scheduling Recurring System Jobs .................................................. 53
Managing Temporary Files ....................................................................................... 57
Guided Exercise: Managing Temporary Files .............................................................. 60
Quiz: Scheduling Future Tasks ................................................................................. 64
Summary ............................................................................................................... 68
3. Tuning System Performance                                                                                        69
Adjusting Tuning Profiles ......................................................................................... 70
Guided Exercise: Adjusting Tuning Profiles ................................................................ 75
Influencing Process Scheduling ................................................................................ 77
Guided Exercise: Influencing Process Scheduling ........................................................ 81
Lab: Tuning System Performance ............................................................................. 85
Summary ............................................................................................................... 90
4. Controlling Access to Files with ACLs                                                                            91
Interpreting File ACLs ............................................................................................. 92
Quiz: Interpreting File ACLs ..................................................................................... 99
Securing Files with ACLs ........................................................................................ 101
Guided Exercise: Securing Files with ACLs ............................................................... 105
Lab: Controlling Access to Files with ACLs ................................................................. 111
Summary .............................................................................................................. 120
5. Managing SELinux Security                                                                                         121
Changing the SELinux Enforcement Mode ................................................................ 122
Guided Exercise: Changing the SELinux Enforcement Mode ....................................... 126
Controlling SELinux File Contexts ........................................................................... 129
Guided Exercise: Controlling SELinux File Contexts ................................................... 133
Adjusting SELinux Policy with Booleans ................................................................... 136
Guided Exercise: Adjusting SELinux Policy with Booleans ........................................... 138
Investigating and Resolving SELinux Issues ............................................................... 141
Guided Exercise: Investigating and Resolving SELinux Issues ...................................... 145
Lab: Managing SELinux Security ............................................................................. 149
Summary .............................................................................................................. 155
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6. Managing Basic Storage                                                                                             157
Adding Partitions, File Systems, and Persistent Mounts .............................................. 158
Guided Exercise: Adding Partitions, File Systems, and Persistent Mounts ...................... 168
Managing Swap Space ........................................................................................... 172
Guided Exercise: Managing Swap Space .................................................................. 176
Lab: Managing Basic Storage .................................................................................. 181
Summary ............................................................................................................... 191
7. Managing Logical Volumes                                                                                          193
Creating Logical Volumes ....................................................................................... 194
Guided Exercise: Creating Logical Volumes .............................................................. 201
Extending Logical Volumes .................................................................................... 207
Guided Exercise: Extending Logical Volumes ............................................................. 212
Lab: Managing Logical Volumes .............................................................................. 216
Summary ............................................................................................................. 223
8. Implementing Advanced Storage Features                                                                  225
Managing Layered Storage with Stratis ................................................................... 226
Guided Exercise: Managing Layered Storage with Stratis ............................................ 231
Compressing and Deduplicating Storage with VDO ................................................... 237
Guided Exercise: Compressing and Deduplicating Storage with VDO .......................... 240
Lab: Implementing Advanced Storage Features ........................................................ 245
Summary ............................................................................................................. 255
9. Accessing Network-Attached Storage                                                                        257
Mounting Network-Attached Storage with NFS ........................................................ 258
Guided Exercise: Managing Network-Attached Storage with NFS ............................... 263
Automounting Network-Attached Storage ............................................................... 268
Guided Exercise: Automounting Network-Attached Storage ........................................ 271
Lab: Accessing Network-Attached Storage .............................................................. 277
Summary ............................................................................................................. 284
10. Controlling the Boot Process                                                                                    285
Selecting the Boot Target ..................................................................................... 286
Guided Exercise: Selecting the Boot Target .............................................................. 291
Resetting the Root Password ................................................................................. 294
Guided Exercise: Resetting the Root Password ......................................................... 298
Repairing File System Issues at Boot ...................................................................... 300
Guided Exercise: Repairing File System Issues at Boot .............................................. 302
Lab: Controlling the Boot Process .......................................................................... 305
Summary ............................................................................................................... 311
11. Managing Network Security                                                                                       313
Managing Server Firewalls ...................................................................................... 314
Guided Exercise: Managing Server Firewalls ............................................................. 322
Controlling SELinux Port Labeling .......................................................................... 327
Guided Exercise: Controlling SELinux Port Labeling .................................................. 330
Lab: Managing Network Security ............................................................................ 334
Summary ............................................................................................................. 343
12. Installing Red Hat Enterprise Linux                                                                            345
Installing Red Hat Enterprise Linux ......................................................................... 346
Guided Exercise: Installing Red Hat Enterprise Linux ................................................. 350
Automating Installation with Kickstart ...................................................................... 353
Guided Exercise: Automating Installation with Kickstart ............................................. 362
Installing and Configuring Virtual Machines .............................................................. 365
Quiz: Installing and Configuring Virtual Machines ...................................................... 370
Lab: Installing Red Hat Enterprise Linux .................................................................. 372
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Summary ............................................................................................................. 379
13. Comprehensive Review                                                                                             381
Comprehensive Review ........................................................................................ 382
Lab: Fixing Boot Issues and Maintaining Servers ....................................................... 385
Lab: Configuring and Managing File Systems and Storage ......................................... 393
Lab: Configuring and Managing Server Security ...................................................... 400
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DOCUMENT CONVENTIONS
REFERENCES
"References" describe where to find external documentation relevant to a subject.
NOTE
"Notes" are tips, shortcuts or alternative approaches to the task at hand. Ignoring a
note should have no negative consequences, but you might miss out on a trick that
makes your life easier.
IMPORTANT
"Important" boxes detail things that are easily missed: configuration changes that
only apply to the current session, or services that need restarting before an update
will apply. Ignoring a box labeled "Important" will not cause data loss, but may cause
irritation and frustration.
WARNING
"Warnings" should not be ignored. Ignoring warnings will most likely cause data loss.
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