Building on lessons taught in Beginning Ubuntu Server Administration, Sander van Vugt’s newest book Pro Ubuntu Server Administration teaches advanced Ubuntu system building. Topics covered include managing simple file servers, virtual servers, performance monitoring and optimization, high-availability clusters, and advanced LDAP integrated networking. Ubuntu continues to lead the market in Linux server deployments—it currently has ? of the market; which is a much larger share than both SUSE and Red Hat. This is a necessary title for system administrators that need intermediate-advanced networking techniques.
Author(s): Sander van Vugt
Edition: 1
Year: 2008
Language: English
Pages: 424
1430216220......Page 1
Contents......Page 6
Foreword......Page 14
About the Author......Page 16
About the Technical Reviewer......Page 17
Introduction......Page 18
What's So Special About an Enterprise Installation?......Page 19
Connection to a SAN......Page 20
Preparing for the Installation in a Network......Page 21
Which RAID?......Page 22
Choosing a File System......Page 23
Installing Ubuntu Server......Page 25
Starting the Installation......Page 26
Creating a Software- Based RAID Solution......Page 27
Creating LVM Logical Volumes on Top of a Software RAID Device......Page 34
Completing the Installation......Page 40
Setting Up NIC Bonding......Page 42
Setting Up Multipathing......Page 44
Summary......Page 46
Setting Up a Clonezilla Imaging Server......Page 47
Setting Up Diskless Remote Boot in Linux......Page 48
Installing the DRBL Software......Page 49
Configuring the DRBL Software......Page 50
Setting Up the DHCP Server......Page 51
Completing Clonezilla Configuration......Page 53
Configuring the Clients for Cloning......Page 54
Setting Up the Server for Cloning......Page 55
Cloning the Client......Page 57
Summary......Page 61
Interpreting What Your Computer Is Doing: top......Page 62
CPU Monitoring with top......Page 63
CPU Performance Monitoring......Page 65
Memory Monitoring with top......Page 66
Process Monitoring with top......Page 67
Analyzing CPU Performance......Page 68
Finding Memory Problems......Page 74
Monitoring Storage Performance......Page 82
Monitoring Network Performance......Page 90
Performance Baselining......Page 97
Summary......Page 98
About /proc and sysctl......Page 99
Applying a Simple Test......Page 101
Understanding CPU Performance......Page 103
Optimizing CPU Performance......Page 104
Understanding Memory Performance......Page 107
Optimizing Memory Usage......Page 108
Understanding Storage Performance......Page 112
Optimizing the I/O Scheduler......Page 113
Tuning Kernel Parameters......Page 114
Optimizing TCP/IP......Page 116
Some Hints on Samba and NFS Performance Optimization......Page 121
Generic Network Performance Optimization Tips......Page 122
Summary......Page 123
Understanding File Systems......Page 124
Inodes and Directories......Page 125
Superblocks, Inode Bitmaps, and Block Bitmaps......Page 127
Journaling......Page 129
Indexing......Page 130
Optimizing Ext2/Ext3......Page 131
Tuning XFS......Page 139
What About ReiserFS?......Page 143
Summary......Page 145
Starting with Nagios......Page 146
Location of the Configuration Files......Page 150
The Master Configuration File: nagios.cfg......Page 151
Creating Essential Nagios Configuration Files......Page 153
Configuring NRPE on the Monitored Server......Page 167
Configuring the Nagios Server to Use NRPE......Page 169
Managing Nagios......Page 170
Summary......Page 174
CHAPTER 7: Creating an Open Source SAN......Page 175
Installing Required Software......Page 177
Setting Up the Distributed Replicated Block Device......Page 178
Configuring the iSCSI Target......Page 183
Configuring the iSCSI Initiator......Page 187
Setting Up the Base Cluster from /etc/ha.d/ha.cf......Page 189
Configuring Cluster Resources......Page 194
Backing Up the Cluster Configuration......Page 201
Configuring STONITH......Page 205
Heartbeat Beyond the Open Source SAN......Page 208
Summary......Page 209
Using the LDAP Directory......Page 210
Introducing OpenLDAP......Page 214
Installing OpenLDAP......Page 215
Configuring the Server......Page 216
Adding Information to the LDAP Database......Page 228
Using ldapsearch to Verify Your Configuration......Page 230
Using LDAP Management Commands......Page 233
Modifying Entries in the LDAP Database......Page 234
Changing a Password......Page 235
Configuring PAM for LDAP Authentication......Page 236
Setting Up nsswitch.conf to Find LDAP Services......Page 241
Summary......Page 243
Setting Up Samba the Easy Way......Page 244
Defining the Share......Page 245
Testing Access to the Share......Page 248
Preparing LDAP to Work with Samba......Page 249
Telling Samba to Use LDAP......Page 251
Changing the Samba Configuration File......Page 254
Creating Workstation Accounts......Page 256
Making Samba a Member of the Active Directory Domain......Page 257
Authenticating Linux Users on Windows with Winbind......Page 258
Summary......Page 260
Understanding the Components of a Mail Solution......Page 261
Configuring the Postfix MTA......Page 262
Handling Inbound and Outbound Mail......Page 263
Installing Postfix and Configuring the Initial Settings......Page 268
Configuring Postfix Further......Page 269
Managing Postfix Components......Page 274
Configuring Global Settings......Page 276
Configuring a Simple Postfix Mail Server......Page 279
Tuning Postfix with Lookup Tables......Page 281
Using Postfix Management Tools......Page 285
Receiving E-mail Using IMAP or POP3......Page 286
Fetching E-mail Using Cyrus IMAPd......Page 287
Filtering Incoming E-mail with procmail......Page 290
Getting E-mail with POP3 Using Qpopper......Page 291
Summary......Page 292
Managing Cryptography......Page 293
Public and Private Keys......Page 294
The Need for a Certificate Authority......Page 295
Creating a Certificate Authority and Server Certificates......Page 296
AppArmor Components......Page 302
Installing and Starting AppArmor......Page 305
Creating and Managing AppArmor Profiles......Page 306
Monitoring AppArmor's Status......Page 311
Summary......Page 314
Installing and Configuring OpenVPN......Page 315
VPN Networking......Page 316
Generating Certificates......Page 317
Configuring the VPN Server......Page 325
Configuring a Linux VPN Client......Page 328
Summary......Page 332
Configuring an NTP Time Server......Page 333
How NTP Works......Page 334
Customizing Your NTP Server......Page 339
Understanding Kerberos......Page 341
Installing and Configuring Kerberos......Page 342
Configuring Generic Kerberos Settings......Page 344
Configuring Simple Kerberos Applications......Page 351
Logging In with Kerberos......Page 352
Summary......Page 353
CHAPTER 14: Ubuntu Server Troubleshooting......Page 354
Identifying the Problem......Page 355
Working with init=/bin/bash......Page 362
Rescue a Broken System......Page 364
Working with a Knoppix Rescue CD......Page 368
Common Problems and How to Fix Them......Page 371
Grub Errors......Page 372
No Master Boot Record......Page 375
Partition Problems......Page 376
LVM Logical Volume Problems......Page 379
Kernel Problems......Page 386
File System Problems......Page 389
Lost Administrator Password......Page 391
Summary......Page 392
B......Page 393
C......Page 394
E......Page 397
G......Page 398
I......Page 399
L......Page 400
M......Page 401
N......Page 402
O......Page 403
P......Page 404
R......Page 405
S......Page 406
T......Page 408
X......Page 409
