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The 102-400 exam comprises six topics (105–110), each of which contains three or four objectives. The six major topics are as follows:

105 Shells, Scripting, and Data Management

105.1 Customize and use the shell environment ( Chapter 9 )

● Set environment variables (e.g., PATH) at login or when spawning a new shell

● Write bash functions for frequently used sequences of commands

● Maintain skeleton directories for new user accounts

● Set command search path with the proper directory

● The following is a partial list of the files, terms, and utilities covered in this objective: source, /etc/bash.bashrc, /etc/profile, env, export, set, unset, ∼/.bash_profile, ∼/.bash_login, ∼/.profile, ∼/.bashrc, ∼/.bash_logout, function, alias, lists

105.2 Customize or write simple scripts ( Chapter 9 )

● Use standard sh syntax (loops, tests)

● Use command substitution

● Test return values for success or failure or other information provided by a command

● Perform conditional mailing to the superuser

● Correctly select the script interpreter through the shebang (#!) line

● Manage the location, ownership, execution, and SUID rights of scripts

● The following is a partial list of the files, terms, and utilities covered in this objective: for, while, test, if, read, seq, exec

105.3 SQL data management ( Chapter 9 )

● Use of basic SQL commands

● Perform basic data manipulation

● The following is a partial list of the files, terms, and utilities covered in this objective: insert, update, select, delete, from, where, group by, order by, join

106 User Interfaces and Desktops

106.1 Install and configure X11 ( Chapter 6 )

● Verify that the video card and monitor are supported by an X server

● Awareness of the X font server

● Basic understanding and knowledge of the X Window configuration file

● The following is a partial list of the files, terms, and utilities covered in this objective: /etc/X11/xorg.conf, xhost, DISPLAY, xwininfo, xdpyinfo, X

106.2 Set up a display manager ( Chapter 6 )

● Basic configuration of LightDM

● Turn the display manager on or off

● Change the display manager greeting

● Awareness of XDM, KDM, and GDM

● The following is a partial list of the files, terms, and utilities covered in this objective: lightdm, /etc/lightdm

106.3 Accessibility ( Chapter 6 )

● Basic knowledge of keyboard accessibility settings (AccessX)

● Basic knowledge of visual settings and themes

● Basic knowledge of assistive technologies (ATs)

● The following is a partial list of the files, terms, and utilities covered in this objective: sticky/repeat keys, slow/bounce/toggle keys, mouse keys, high contrast/large Print Desktop themes, screen reader, Braille display, screen magnifier, onscreen keyboard, Gestures (used at login; for example, gdm), Orca, GOK, emacspeak

107 Administrative Tasks

107.1 Manage user and group accounts and related system files ( Chapter 7 )

● Add, modify, and remove users and groups

● Manage user/group info in password/group databases

● Create and manage special-purpose and limited accounts

● The following is a partial list of the files, terms, and utilities covered in this objective: /etc/passwd, /etc/shadow, /etc/group, /etc/skel, chage, getent, groupadd, groupdel, groupmod, passwd, useradd, userdel, usermod

107.2 Automate system administration tasks by scheduling jobs ( Chapter 7 )

● Manage cron and at jobs

● Configure user access to cron and at services

● Configure anacron

● The following is a partial list of the files, terms, and utilities covered in this objective: /etc/cron.{d, daily, hourly, monthly, weekly}, /etc/at.deny, /etc/at.allow, /etc/crontab, /etc/cron.allow, /etc/cron.deny, /var/spool/cron/*, crontab, at, atq, atrm, anacron, /etc/anacrontab

107.3 Localization and internationalization ( Chapter 6 )

● Configure locale settings and environment variables

● Configure time zone settings and environment variables

● The following is a partial list of the files, terms, and utilities covered in this objective: /etc/timezone, /etc/localtime, /usr/share/zoneinfo, environment variables (LC_*, LC_ALL, LANG, TZ), /usr/bin/locale, tzselect, tzconfig, date, iconv, UTF-8, ISO-8859, ASCII, Unicode

108 Essential System Services

108.1 Maintain system time ( Chapter 7 )

● Set the system date and time

● Set the hardware clock to the correct time in UTC

● Configure the correct time zone

● Basic NTP configuration

● Knowledge of using the pool.ntp.org service

● Awareness of the ntpq command

● The following is a partial list of the files, terms, and utilities covered in this objective: /usr/share/zoneinfo, /etc/timezone, /etc/localtime, /etc/ntp.conf, date, hwclock, ntpd, ntpdate, pool.ntp.org

108.2 System logging ( Chapter 7 )

● Configuration of the syslog daemon

● Understanding of standard facilities, priorities, and actions

● Configuration of logrotate

● Awareness of rsyslog and syslog-ng

● The following is a partial list of the files, terms, and utilities covered in this objective: syslog.conf, syslogd, klogd, /var/log, logger, logrotate, /etc/logrotate.conf, /etc/logrotate.d/, journalctl, /etc/system/journal.conf, /var/log/journal/

108.3 Mail Transfer Agent (MTA) basics ( Chapter 9 )

● Create email aliases

● Configure email forwarding

● Knowledge of commonly available MTA programs (postfix, sendmail, qmail, exim) (no configuration)

● The following is a partial list of the files, terms, and utilities covered in this objective: ∼/.forward, sendmail emulation layer commands, newaliases, mail, mailq, postfix, sendmail, exim, qmail

108.4 Manage printers and printing ( Chapter 6 )

● Basic CUPS configuration (for local and remote printers)

● Manage user print queues

● Troubleshoot general printing problems

● Add and remove jobs from configured printer queues

● The following is a partial list of the files, terms, and utilities covered in this objective: CUPS configuration files, tools and utilities; /etc/cups; lpd legacy interface (lpr, lprm, lpq)

109 Networking Fundamentals

109.1 Fundamentals of Internet protocols ( Chapter 8 )

● Demonstrate an understanding of network masks and CIDR notation

● Knowledge of the differences between private and public “dotted quad” IP addresses

● Knowledge about common TCP and UDP ports (20, 21, 22, 23, 25, 53, 80, 110, 123, 139, 143, 161, 162, 389, 443, 465, 514, 636, 993, 995)

● Knowledge about the differences and major features of UDP, TCP, and ICMP

● Knowledge of the major differences between IPv4 and IPV6

● Knowledge of the basic features of IPv6

● The following is a partial list of the files, terms, and utilities covered in this objective: /etc/services, IPv4, IPv6, subnetting, TCP, UDP, ICMP

109.2 Basic network configuration ( Chapter 8 )

● Manually and automatically configure network interfaces

● Basic TCP/IP host configuration

● Setting a default route

● The following is a partial list of the files, terms, and utilities covered in this objective: /etc/hostname, /etc/hosts, /etc/nsswitch.conf, ifconfig, ifup, ifdown, ip, route, ping

109.3 Basic network troubleshooting ( Chapter 8 )

● Manually and automatically configure network interfaces and routing tables to include adding, starting, stopping, restarting, deleting, or reconfiguring network interfaces

● Change, view, or configure the routing table and correct an improperly set default route manually

● Debug problems associated with the network configuration

● The following is a partial list of the files, terms, and utilities covered in this objective: ifconfig, ip, ifup, ifdown, route, host, hostname, dig, netstat, ping, ping6, traceroute, traceroute6, tracepath, tracepath6, netcat

109.4 Configure client-side DNS ( Chapter 8 )

● Query remote DNS servers

● Configure local name resolution and use remote DNS servers

● Modify the order in which name resolution is done

● The following is a partial list of the files, terms, and utilities covered in this objective: /etc/hosts, /etc/resolv.conf, /etc/nsswitch.conf, host, dig, getent

110 Security

110.1 Perform security administration tasks ( Chapter 10 )

● Audit a system to find files with the SUID/SGID bit set

● Set or change user passwords and password aging information

● Be able to use nmap and netstat to discover open ports on a system

● Set up limits on user logins, processes, and memory usage

● Determine which users have logged in to the system or are currently logged in

● Basic sudo configuration and usage

● The following is a partial list of the files, terms, and utilities covered in this objective: find, passwd, lsof, nmap, chage, netstat, sudo, /etc/sudoers, su, usermod, ulimit, who, w, last

110.2 Set up host security ( Chapter 10 )

● Awareness of shadow passwords and how they work

● Turn off network services not in use

● Understand the role of TCP wrappers

● The following is a partial list of the files, terms, and utilities covered in this objective: /etc/nologin, /etc/passwd, /etc/shadow, /etc/xinetd.d/*, /etc/xinetd.conf, /etc/inetd.d/*, /etc/inetd.conf, /etc/inittab, /etc/init.d/*, /etc/hosts.allow, /etc/hosts.deny

110.3 Securing data with encryption ( Chapter 10 )

● Perform basic OpenSSH 2 client configuration and usage

● Understand the role of OpenSSH 2 server host keys

● Perform basic GnuPG configuration and usage

● Understand SSH port tunnels (including X11 tunnels)

● The following is a partial list of the files, terms, and utilities covered in this objective: ssh, ssh-keygen, ssh-agent, ssh-add, ∼/.ssh/id_rsa and id_rsa.pub, ∼/.ssh/id_dsa and id_dsa.pub, /etc/ssh/ssh_host_rsa_key and ssh_host_rsa_key.pub, /etc/ssh/ssh_host_dsa_key and ssh_host_dsa_key.pub, ∼/.ssh/authorized_keys, /etc/ssh_known_hosts, gpg, ∼/.gnupg/*