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This edition adds extensive new coverage reflecting the realities of today's IT environments, and anticipates tomorrow's. Topics covered in depth include: virtualization; cloud computing; modern security best practices; eco-friendly IT management; web load balancing; LDAP and Active Directory integration; Ruby, PHP, and Python scripting; system administration outsourcing; DTrace; Spacewalk; and much more. The book has also been thoroughly updated to cover today's leading Linux and Unix platforms, including modern versions of Red Hat Enterprise Linux, openSUSE, and Ubuntu; Solaris and OpenSolaris 11; HP-UX 11i v3, and even AIX 6.1. Key Features The 1 sysadmin's guide - now fully updated for Red Hat Enterprise Linux, openSUSE, Ubuntu, Solaris/OpenSolaris 11, HP-UX 11i v3 and AIX 6.1 System administration for a new generation: virtualization, cloud computing, security, Green IT, and more Clear, expert guidance for building high-performance, production-grade systems and networks that are easy to maintain, monitor, and control Table of contents Where to Start Booting and Shutting Down Rootly Powers Controlling Processes The Filesystem Adding New Users Serial Devices Adding A Disk Periodic Processes Backups Syslog and Log Files Drivers and the Kernel TCP/IP Networking Routing Network Hardware The Domain Name System The Network File System Sharing System Files Electronic Mail Network Management and Debugging Security Web Hosting and Internet Servers Software Installation and Localization Printing Maintenance and Environment Green IT Virtualization and Cloud Computing Performance Analysis Cooperating with Windows Daemons Policy and Politics X Windows