Nathan Campi, Kirk Bauer's Automating Linux and Unix System Administration PDF

By Nathan Campi, Kirk Bauer

ISBN-10: 1430210591

ISBN-13: 9781430210597

Bauer K., Campi N. Automating Linux and Unix method management, moment variation (Apress, 2008)(ISBN 1430210591)

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No file name is given in the second argument, so the original file name is used (beha, in this case). C HA P TER 3 N U S 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 LY Enhancing Security with SSH Before SSH, the pahjap command was widely used for interactive logins. Telnet works fine, except that the password (well, everything actually) is sent over the network in plain text. This isn’t a problem within a secure network, but you rarely encounter secure networks in the real world.

If your scripting is as portable as possible from the start, in effect you’re buying insurance against future pain. Seeing Everything As a File One of the core strengths of UNIX and UNIX-like operating systems is the fact that almost everything on the system is represented to the user as a file. Both real and pseudo devices (such as +`ar+jqhh, +`ar+vank, and so on) can be read from and (often) written to as normal files. This capability has made many operations easy, when the same results would be difficult to attain under other operating systems.

If you specify multiple options, you must separate them with commas. Here’s a list of the options and a brief description of each (the ood` man page contains more detailed information): bnki9l]ppanj)heop: This option can specify a list of hosts from which the connection must be made. This way, even if the key (and the passphrase) is stolen, the connection still must be made from the appropriate host(s). The pattern could be &*iukbbe_a*_ki to allow only hosts from the office to connect using that key.

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Automating Linux and Unix System Administration by Nathan Campi, Kirk Bauer

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