Essential System Administration: Tools and Techniques for Linux and Unix Administration, 3rd Edition

Essential System Administration: Tools and Techniques for Linux and Unix Administration, 3rd Edition

Language: English

Pages: 1178

ISBN: 0596003439

Format: PDF / Kindle (mobi) / ePub


Essential System Administration,3rd Edition is the definitive guide for Unix system administration, covering all the fundamental and essential tasks required to run such divergent Unix systems as AIX, FreeBSD, HP-UX, Linux, Solaris, Tru64 and more. Essential System Administration provides a clear, concise, practical guide to the real-world issues that anyone responsible for a Unix system faces daily.The new edition of this indispensable reference has been fully updated for all the latest operating systems. Even more importantly, it has been extensively revised and expanded to consider the current system administrative topics that administrators need most. Essential System Administration,3rd Edition covers: DHCP, USB devices, the latest automation tools, SNMP and network management, LDAP, PAM, and recent security tools and techniques.Essential System Administration is comprehensive. But what has made this book the guide system administrators turn to over and over again is not just the sheer volume of valuable information it provides, but the clear, useful way the information is presented. It discusses the underlying higher-level concepts, but it also provides the details of the procedures needed to carry them out. It is not organized around the features of the Unix operating system, but around the various facets of a system administrator's job. It describes all the usual administrative tools that Unix provides, but it also shows how to use them intelligently and efficiently.Whether you use a standalone Unix system, routinely provide administrative support for a larger shared system, or just want an understanding of basic administrative functions, Essential System Administration is for you. This comprehensive and invaluable book combines the author's years of practical experience with technical expertise to help you manage Unix systems as productively and painlessly as possible.

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options or zone statement: notify no; The default is yes. BIND 9 adds a third keyword: explicit. This keyword allows you to limit update notifications to the list of name servers specified in the options statement's allow-notify option. For example: options { notify explicit; allow-notify { 192.168.10.1; 192.168.20.2; ...; }; }; Finally, you can specify additional slave name servers that should be notified of changes with the also-notify substatement, which can be used with either the options

At a minimum, this should contain all the aliases for the local hostname. You will also need to include the local domain within the file in order to support local delivery of addresses of the form user@local-domain (i.e., user@ahania.com, in our example). Tip This macro is actually included by default in most sendmail configurations. Therefore, mail client systems also use this file (it is enabled within one of the m4 include files), and you should configure it on such systems as well.

well to other backup media. [4] Not all backup commands explicitly use level numbers, but the concept is valid for and can be implemented with any of the available tools, provided you are willing to do some of the record keeping yourself (by hand or by script). [5] Another such time is when you are rebuilding a filesystem. Backup Media When I first started working as a system administrator, 9-track tape was the only medium you'd consider using for a backup.[6] That's certainly no

Traditionally, the a partition on the root disk contains the root filesystem. b partitions are conventionally used as swap partitions. On the root disk, other partitions might be used for various system directories: for example, e for /usr, h for /var, d for other filesystems, and so on. The c partition often refers to the entire disk as a whole: every bit of space on the disk, including areas that should be accessed only by the kernel (such as the partition table at the beginning of the drive).

information: DUMP SUMMARY: DUMPER STATS TAPER STATS HOST DISK L ORIG-KB OUT-KB COMP% MMM:SS KB/s MMM:SS KB/s ------------------------------------------------------------- hamlet sd1a 1 28255 28255 -- 2:36 180.3 0:21 1321.1 hamlet sd2a 0 466523 466523 -- 36:51 211.1 5:33 1400.8 dalton /chem 1 FAILED--------------------------------------- ada /home 1 39781 39781 -- 5:16 125.7 0:29 1356.7 ... You should examine the reports regularly, especially the sections related to errors and performance.

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