F-H

Fault Management Resource Identifier (FMRI)

The name for a service instance such as svc:/application/print/server:default for the default instance of a print scheduler.

FDDI

Fiber Distributed Data Interface; a physical network technology based on fiber optics.

file

The smallest unit of data stored on a medium such as a disk.

file system

The way an operating system organizes files on a storage device.

File Transfer Protocol

A protocol and a utility (ftp) based on that protocol used to transfer files from one system to another on the network or across the Internet.

flash archive

An installation method used to make a number of identical Solaris installations by using an image of an already installed system.

fsck

File system check; a command used to find inconsistencies in the file system and repair them.

ftp

See File Transfer Protocol.

full backup

A file system backup that copies a whole file system from the system to a storage device such as a tape.

GID

Group ID; an identification number assigned to a group.

grep

A UNIX command used to search files for a specific pattern.

group

A logical collection of users created for the purpose of assigning permissions.

groupadd

A command used to add a new group to the system.

groupdel

A command used to delete a group from the system.

groupmod

A command used to modify some properties of a group in the system.

halt

A command just like the poweroff command that synchronizes the file systems and stops the processor. It's not recommended because it does not shut down all the processes.

hard link

A pointer to a file that is indistinguishable from the original file; that is, any changes to a file are effective regardless of the name used to refer to the file: the link name or the original file name. Furthermore, a hard link can only point to a file and not a directory. Also, a hard link cannot span file systems, that is, the link and the file have to be on the same file system because both have the same inode number.

High Sierra file system

The first file system for CD-ROMs. It's official standard version is ISO 9660 with the Rock Ridge extensions, which provide all the UFS features and file types except the write and the hard links features. It is a read-only file system

host

Any computer connected to a network.

host name

The name of a computer connected to a network.

hot spare

A disk slice that is reserved for automatic substitution in case the corresponding data slice fails.

hot spare pool

A collection (an ordered list) of hot spares that SVM uses to provide increased data availability and fault tolerance for a RAID1 (mirrored) volume and a RAID 5 (striped data with striped parity) volume.

HSFS

See High Sierra file system.

HTTP

See HyperText Transfer Protocol.

hub

The central device in a network based on the star topology. Each computer is connected to a different port on the hub. A hub receives a signal on one port and repeats it on all other ports, and is not aware of the MAC addresses. If it simply provides the electrical connection between ports, it is called a passive hub, and it is typically un-powered. If it amplifies the signal it receives while repeating it on multiple ports, it is called an active port, and it is powered.

HyperText Transfer Protocol

The protocol, commonly known as HTTP, on which web browsers and web servers (which make the World Wide Web) are based.