Essential System Administration, 3rd Edition: Tools and by Æleen Frisch

By Æleen Frisch

Crucial process Administration,3rd version is the definitive advisor for Unix process management, overlaying the entire primary and crucial initiatives required to run such divergent Unix platforms as AIX, FreeBSD, HP-UX, Linux, Solaris, Tru64 and extra. crucial process management presents a transparent, concise, useful advisor to the real-world matters that any one liable for a Unix process faces day-by-day. the hot variation of this vital reference has been absolutely up-to-date for the entire most modern working platforms. much more importantly, it's been generally revised and elevated to contemplate the present approach administrative issues that directors want such a lot. crucial process Administration,3rd variation covers: DHCP, USB units, the newest automation instruments, SNMP and community administration, LDAP, PAM, and up to date protection instruments and strategies.

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Figure 1-11. The Ximian Setup Tools This applet, even in this early incarnation, goes well beyond a simple dialog allowing you to set the current date and time; it also allows you to specify time servers for Internet-based time synchronization. The other tools are of similar quality, and the package seems very promising for those who want GUI-based system administration tools. info Copyright © 2007 O’Reilly & Associates, Inc. All rights reserved. VNC I’ll close this section by briefly looking at one additional administrative tool that can be of great use for remote administration, especially in a heterogeneous environment.

The following commands display the current groups that are allowed to su to root and then limit that same access to the system and admins groups: # lsuser -a sugroups root root sugroups=ALL # chuser sugroups="system,admins" root Most Unix versions also allow you to restrict direct root logins to certain terminals. This topic is discussed in Chapter 12. An Armadillo? The armadillo typifies one attribute that a successful system administrator needs: a thick skin. Armadillos thrive under difficult environmental conditions through strength and perseverance, which is also what system administrators have to do a lot of the time (see the colophon at the back of the book for more information about the armadillo).

In fact, novice administrators frequently assume that the tools do make sure their selections are reasonable, falsely thinking that they are protected from anything harmful. • All of the options for commands included in the tool should be available for use, except when doing so would violate the next item. • The tool should not include every administrative command. More specifically, it should deliberately omit commands that could cause catastrophic consequences if they are used incorrectly. Which items to omit depends on the sort of administrators the tool is designed for; the scope of the tool should be directly proportional to the amount of knowledge its user is assumed to have.

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