The Definitive Guide to SUSE Linux Enterprise Server 12
Language: English
Pages: 568
ISBN: 1430268212
Format: PDF / Kindle (mobi) / ePub
The Definitive Guide to SUSE Linux Enterprise Server 12 is a task-oriented book designed for self-study as well as classroom environments, which will also serve you as a reference guide. The book covers all skills that system administrators typically need to posses to administer SUSE Linux Enterprise Server in corporate environments. It starts at the beginning, which makes The Definitive Guide to SUSE Linux Enterprise Server 12 suitable for people without any preliminary Linux knowledge, and yet works up to advanced SUSE Linux administration tasks, such as building a cluster, optimizing performance or managing SUSE Linux Enterprise Server with SUSE Manager.
The Definitive Guide to SUSE Linux Enterprise Server 12 is an ideal reference guide for system administrators, but is also perfect as a study book to prepare for the CLA, CLP as well as the CLE exams. This book contains step-by-step exercises, and scenario based exercises at the end of each chapter to help readers getting familiar with the subjects that are required to pass these three exams. The Definitive Guide to SUSE Linux Enterprise Server 12also contains test exams, so you can use it as a study guide in a formal learning environment or as a book that you can learn and test your own progress as you master SUSE Linux Enterprise Server.
You'll learn everything you need to know and the skills you need to manage SUSE Linux Enterprise Servers, from installing a secure server, to performing the day-to-day management tasks on SUSE Linux Enterprise Server. Along the way you'll encounter and master SUSE Linux Enterprise Server in a data center environment, how to manage your SUSE Enterprise Server for High Availability, and you'll see how to manage your SUSE Linux Enterprise Server with SUSE Manager. From installation to expert management, The Definitive Guide to SUSE Linux Enterprise Server 12 will show you the ways to succeed with Linux Enterprise Server 12.
What you’ll learn
- Everything you need to know and the skills you need to manage SUSE Linux Enterprise Servers.
- Install a secure SUSE Linux Enterprise Server.
- Perform day-to-day management tasks on SUSE Linux Enterprise Server.
- How to pass the SUSE CLA, CLP as well as CLE exams.
- How to manage a SUSE Linux Enterprise Server in a data center.
- Integrate SUSE Linux Enterprise Server in a High Availability environment.
- Manage SUSE Linux Enterprise Server with SUSE Manager.
Who this book is for
The Definitive Guide to SUSE Linux Enterprise Server 12 is a task-oriented book designed for self-study as well as classroom environments which also serves as a reference guide. The book covers all skills that system administrators typically need to posses to administer SUSE Linux Enterprise Server in corporate environments. It starts at the beginning, which makes the book apt for people without any preliminary Linux knowledge, and works up to advanced SUSE Linux administration tasks, such as building a cluster, optimizing performance or managing SUSE Linux Enterprise Server with SUSE Manager.
Table of Contents
Part I: Basic skills
Chapter 1: Introduction and Installation
Chapter 2: Basic command line and YaST skills
Part II: Administering SUSE Linux Enteprise Server
Chapter 3: Managing File Systems
Chapter 4: User and Permission Management
Chapter 5: Common Administration Tasks: printing, cron, logging, software, process management
Chapter 6: Hardening SUSE Linux: SELinux, Apparmor, sudo, authentication clients
Chapter 7: Virtualization Management
Chapter 8: Managing hardware, the kernel and the boot procedure
Part III: Networking SUSE Linux Enterprise Server
Chapter 9: Configuring Network Access
Chapter 10: Securing Internet servers: SUSEfirewall, IPtables, SSL
Chapter 11: Basic Network Services: Xinetd, NTP, DNS, DHCP, LDAP
Chapter 12: Internet Services: Setting up a LAMP Server
Chapter 13: File sharing: Samba NFS and FTP
Part IV: Advanced SUSE Linux Enterprise Server Administration
Chapter 14: Shell scripting
Chapter 15: Optimizing Performance
Chapter 16: High Availability Clustering
Chapter 17: Creating a SLES 12 Installation Server
Chapter 18: Managing SUSE Linux: SMT and SUSE Manager
waiting for I/O. If the value that you see here is often above 30 percent, that could indicate a problem on the I/O-channel, which involves storage and network. See the sections “Monitoring Storage Performance” and “Understanding Network Performance” later in this chapter to find out what may be happening. hi: The hi parameter relates to the time the CPU spends handling hardware interrupts. You will see some utilization here when a device is particularly busy (optical drives do stress this
gateway_server | 12-57.1 | SLES12-12-0 | | gnome-basic | 12-5.1 | SLES12-12-0 | i | gnome-basic | 12-5.1 | @System | | kvm_server | 12-57.1 | SLES12-12-0 | i | kvm_server | 12-57.1 | @System | | kvm_tools | 12-57.1 | SLES12-12-0 | i | kvm_tools | 12-57.1 | @System | | lamp_server | 12-57.1 | SLES12-12-0 | | mail_server | 12-57.1 | SLES12-12-0 | | ofed | 12-57.1 | SLES12-12-0 | | oracle_server |
or ports. To accomplish this, SELinux applies a context to every file, directory, process, and port. This context is a security label that defines how this file, directory, process, or port should be treated. These context labels are used by the SELinux policy, which defines exactly what should be done with the context labels. By default, the policy blocks all non-default access, which means that, as an administrator, you have to enable all features that are non-default on your server.
kernel module is loaded. In the previous exercise, you have applied an option to a kernel module. Unfortunately, there is no good way of verifying that the parameter has indeed been applied. On some occasions, you can type dmesg to see the output that was generated when loading the kernel module. On other occasions, you can check the contents of the /sys/module/yourmodule directory, which sometimes contains a file with the name parameters, containing all parameters that were used when loading
alloc_rx_buff_failed: 0 tx_smbus: 0 rx_smbus: 0 dropped_smbus: 0 With ethtool, you can perform some tests as well. First, it may be useful to identify your network card. This makes sense on a server with multiple network cards. Use ethtool -p eth0 5, which lets the leds on your eth0 device blink for five seconds. At least you’ll be sure which cable to pull and which one to leave alone! In some cases, you may have to change device parameters, to get the best out of your network card. To