A Practical Guide to Ubuntu Linux

Chapter 12. System Administration: Core Concepts

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IN THIS CHAPTER

Running Commands with root Privileges	487
sudo: Running a Command with root Privileges	490
The Upstart Event-Based init Daemon	500
SysVinit (rc) Scripts: Start and Stop System Services	507
Recovery (Single-User) Mode	512
rpcinfo: Displays Information About portmap	530
TCP Wrappers: Secure a Server (hosts.allow and hosts.deny)	532
Setting Up a chroot Jail	534
DHCP: Configures Network Interfaces	538

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The job of a system administrator is to keep one or more systems in a useful and convenient state for users. On a Linux system, the administrator and user may both be you, with you and the computer being separated by only a few feet. Alternatively, the system administrator ...