G

gateway, 330

email, 329–330

as mediator between network environments, 329

GECOS (General Electric Computer Operating System), 172

General Electric, 6

Giganet Ethernet, 326

grant authorization, 480

graphical user interface (GUI), 24, 30, 48

installation, 53

as default, 54

mode, 15, 36, 39

group, 193, 223

accounts

managing, 180–182

managing with shell command line, 176–182

modifying, 181

adding, 181

creating, 190

deleting, 181–182, 182, 190

file, 174–175, 175

fields in, 174, 174

structure of, 174

syntax in, 174

membership, 212–219

changing, 203

modifying, 181, 190

name, 189, 190

password, 190

primary, 188

secondary, 188

users and, 183

group ID (GID), 169–170, 189, 190, 192, 217, 501

group ownership

changing, 227

with chgrp, 218

GUI tools, 166, 182