I-L

incremental backup

A type of backup that backs up only those files from a file system or directory that have changed since the previous backup.

init

A command that kills all active processes and synchronizes the file systems before changing to the target run level (0 or 5).

inittab

A file with the path /etc/inittab used to describe the run levels and set the default run level for the system. This file contains two important pieces of information for the init process: what processes to start, monitor, and restart if they terminate; and what to do if the system enters a new run level.

inode

A data structure that stores the information about a file such as the file type, the permissions on the file, and the number of hard links to the file.

install server

A server that contains the Solaris installation files (an image of the Solaris operating environment from the installation CDs or DVD) used for installation over a network in the JumpStart method.

IP address

A 4-octet (32-bit) number used to uniquely identify a host connected to a network.

IP datagram

A data packet in the Network layer.

IPv6

The latest version of the Internet Protocol (IP) that allows for better security and increased available addresses. An IP address in IPv6 is 128 bits long.

JumpStart

A method to automate the Solaris installation by storing the installation information in a set of files (that is, pre-configuring) so that the install process requires little or no input.

kernel

The core of an operating system that communicates with the computer hardware, schedules and executes the system commands, and manages all of the daemons and file systems.

kill

A command used to send a signal to one or more processes. For example, kill -9 will terminate (kill) a process promptly, and kill -25 will start a stopped process.

Korn shell

A UNIX shell developed by David G. Korn at Bell Laboratories in New Jersey.

LAN

See local area network.

LDAP

See Lightweight Directory Access Protocol.

Lightweight Directory Access Protocol

An Internet protocol on which the directory service popularly knows as LDAP is based. It is a lighter version of the original directory protocol called X.500, which is a very complex protocol, and its closest implementation is the original Novell Directory Service (NDS), which offers more features than LDAP and was made LDAP compatible due to the popularity of LDAP.

local area network

A computer network that is confined to a local area such as a room, a building, or a group of local buildings.

lpadmin

A command used to add a new printer or to change the configuration of an existing printer.

LP print service

A set of software utilities that automate the process of sharing printers to print files.

lpsched

A daemon that manages the print requests on a system on which the print server is running. When it is stopped, print requests are neither accepted nor printed.

ls

A command used to list the contents of a directory, that is, the names and other information about the files and subdirectories.