Ubuntu Unleashed 2019 Edition: Covering 18.04, 18.10, 19.04

assigning,   140

changing,    220

changing    with    chgrp   command,     143

changing    with    chmod   command,     141 – 142 ,     165

changing    with    chown   command,     143

changing    with    umask   command,     143

directory   permissions,     141

examining,   139

Fetchmail,   600

set user    ID/set  group   ID,  144 – 145

sticky  bit,     145

resources   for information,     242 ,   413

with    Tripwire,    406

user    accounts. See user  accounts

viruses,     407

vulnerabilities,    assessing,   403 – 404

wireless    networks,    404 – 405

sed command, 205 – 207

SELECT statement (SQL), 518 – 520

select statements, 281 – 282

selecting. See choosing

Sender Policy Framework (SPF), 639

sending

email

MDAs    (mail   delivery    agents),     590 – 591 ,     600 – 602

MTAs    (mail   transfer    agents),     588 – 590

MUAs    (mail   user    agents),     591

overview,    587 – 588

Postfix,     591 – 596