/var directory, 573–574
/var/log, 508–512
video applications, 236
video card, information requirements, 24
video devices, 626
virtual desktops, 122
virtual domains, 684–685
virtual hosts
on Apache Web server, 425–430
dynamic, 427–430
IP address-based, 425–426
name-based, 426–427
virtual private networks (VPNs), 75
Crypto IP Encapsulation (CIPE), 312
tunnel mode, 310–312
vmstat, 513
access controls, 386–387
anonymous user permissions, 385
configuration, 383–386
connection time limits, 385–386
enabling login access, 384
enabling standalone access, 384
local user permissions, 384–385
logging, 386
messages, 386
running, 382–383
virtual hosts, 388
virtual users, 388–389