11. System Administration: Core Concepts

In This Chapter

System Administrator and Superuser

Rescue Mode

SELinux

The Upstart Event-Based init Daemon (FEDORA)

rpcinfo: Displays Information About rpcbind

The xinetd Superserver

TCP Wrappers: Client/Server Security (hosts.allow and hosts.deny)

Setting Up a chroot Jail

DHCP: Configures Hosts

nsswitch.conf: Which Service to Look at First

PAM

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. Or the system administrator may be halfway around the world, supporting a network of systems, with you being simply one of thousands ...

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