Download PDF by Kirk Bauer, Nate Campi: Automating Linux and Unix System Administration (2nd

By Kirk Bauer, Nate Campi

ISBN-10: 1430210605

ISBN-13: 9781430210603

Even if you would like a community of ten Linux desktops and a server or an information heart with a couple of thousand UNIX nodes, you must understand how to automate a lot of the deploy, configuration, and conventional procedure administration.

Build your community as soon as utilizing cfengine, and the community construct will paintings, with no consumer intervention, on any you wish. Automating Linux and Unix procedure management, moment variation is exclusive in its specialise in how one can make the approach administrator's activity more uncomplicated and extra effective: rather than simply dealing with the procedure administrator's time, the booklet explains the expertise to automate repetitive projects and the technique to automate successfully.

* either new and pro pros will benefit from industry–leading insights into the automation process.
*System directors will reach an intensive seize of cfengine, kickstart, and shell scripting for automation.
*After studying all chapters and following all routines during this e-book, the reader might be capable of organize whatever from a Linux info middle to a small workplace community.

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Additional resources for Automating Linux and Unix System Administration (2nd Edition)

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These systems can still be security risks, so you should include them in your automation system. You have to be aware of conflicts that might arise between your automation system and the user’s own actions. The user might destroy something your system did, in C HA P TER 1 N I N T R O D U C I N G T H E B A S I C S O F A U T O M A T I O N which case the system should do it again automatically. Similarly, your automation might destroy changes the user wanted to make on his or her system—you would have to work with the user to find a different way to make the change.

Allowing Limited Command Execution Suppose you have a script that monitors a set of servers. Root access is not necessary for monitoring the systems. The script does, however, need to reboot the machines in some C HA P TER 3 N US ING S S H TO A U T O M A T E S Y S T E M A D M I N I S T R A T I O N S E C U R E L Y cases, which does require root access. The following configuration, when placed in znkkp+ ]qpdkneva`[gauo, allows this specific key to reboot the system and nothing more: jk)lknp)bkns]n`ejc(_kii]j`9+o^ej+na^kkp(jk)lpu ood)no]=>***UV Whoever possesses the specified private key cannot open an interactive shell or forward ports.

What happens if some systems are currently unavailable? Are they just forgotten? This is where the pull method really shines. If you make a change to one or more configuration servers, all your systems will pick up those changes when they can. If a system is a laptop at somebody’s home, it might not get the changes until the next day. If a system has hardware problems, it might not get the changes until the next week. But all your systems will eventually have the changes applied—and most almost immediately.

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Automating Linux and Unix System Administration (2nd Edition) by Kirk Bauer, Nate Campi

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