Hardening Linux

U

UDP, resources, 240

unauthorized processes, identifying and shutting down, 7-9

unauthorized users, terminating, 5-7

uninterruptible power supplies . See UPSs

unnecessary services

checking configuration for, 44

disabling, 17-46

turning off from the command line, 40-43

See also necessary services; services

up2date tool, 93-94

command line interface patch installation, 314-317

--download option, 317

graphical interface patch installation, 303-314

options, 315

updates

central patch server, 318-319

monitoring and management, 319-321

SUSE, 296-303

up2date tool, 303-314

UPSs, 13

U.S. Bureau of Industry and Security, 143

users

listing logged-in users, 5

unauthorized, 5-7