Unix/Linux survival guide by Erik M. Keller

By Erik M. Keller

The Reference that each Unix SysAdmin wishes!

All Unix/Linux structures, despite producer, have inherent similarities for directors. The Unix/Linux Survival advisor info those similarities and teaches SysAdmins the best way to take on jobs on all platforms. blending administrator wisdom and top practices, the ebook walks admins step by step via fitting, constructing, and configuring a brand new approach. It additionally teaches them how you can administer structures they didn’t organize initially. meant as a short and soiled reference for directors to exploit of their day-by-day paintings, the booklet includes a number of tricks on the place to seem and what to seem for to get a Unix/Linux approach up to the mark and working easily. Admins also will examine preventive upkeep innovations to extract and assessment baseline information and create a caution method that enables them to react to difficulties ahead of clients even become aware of. day-by-day activity checklists are supplied, and different key issues reminiscent of backup, protection, and documentation are coated intimately. This booklet presents the data, ability set, suggestions, and process had to speedy administer quite a lot of *NIX platforms.

Key good points * presents a brief, easy-to-use reference for Unix/ Linux approach directors * Teaches what process directors want to know to prevent procedure breakdowns * Explains numerous very important administrative projects, together with programming small scripts, consumer management, fitting and configuring platforms, getting ready a brand new procedure for creation, establishing a try out approach, backup, documentation, preventive upkeep strategies, and knowledge safeguard at the CD Scripts * comprises the management scripts from the publication Figures * contains all the figures from the booklet by means of bankruptcy method necessities Unix/Linux working approach; Perl model 5.x or better; Java Runtime atmosphere (JRE) 1.3 or more recent for the DocBook instance.

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25 seems to indicate that the system spends most of its time waiting for I/O operations to complete. So the one-shot mode of sar can be used to diagnose a condition on the fly. Job one, in this case, would be to find out why the machine complains about slow I/O. One could use top to find the process(es) hogging the I/O subsystem or run sar repeatedly in concert with ps to find the reason for the high wait I/O percentage. Things to Check 19 Another approach could be to analyze what happened earlier today by using the stored data collected by sar.

Nobody forces you to use variables to call the needed programs. It is just good practice; after all, then you have only one line to change if needed. 3 Extending the Script The script is now ready to be deployed on all systems where its functionality is useful. The drawback is that you are required to log into every system, run the script, and act on the output. If the script would run automatically at predefined times and write the output to a file, the task would be definitely simpler. 14 extends the functionality of the script by having the output written to a file.

13 describes the process. 2 locked by: erikk; date: 2004/08/03 10:29:54; author: erikk; state: Exp; lines: +7 -2 added variables for executables ======================================================================= ====== erikk@unixhost:> The -r (revision) option is intended to give access to a certain revision, and if no specific revision is supplied, the information regarding the last check-in is displayed. 1. If you intend to use the script on another *NIX system, variables enable you to keep the needed changes to a minimum.

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