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LX0-104 - CompTIA Linux+ [Powered by LPI] - 2 - Dump Information

Vendor	:	CompTIA
Exam Code	:	LX0-104
Exam Name	:	CompTIA Linux+ [Powered by LPI] - 2
Questions and Answers	:	120 Q & A
Updated On	:	November 17, 2017
PDF Download Mirror	:	LX0-104 Brain Dump
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LX0-104 Questions and Answers

QUESTION: 106 CORRECT TEXT

In an xinetd configuration file, which attribute specifies the network address that

will be used to provide the service?

Answer: bind, interface

QUESTION: 107 CORRECT TEXT

Which file lists which users can execute commands using sudo? (Specify the full name of the file, including path.)

Answer: /etc/sudoers

QUESTION: 108 CORRECT TEXT

The presence of what file will temporarily prevent all users except root from

logging into the system? (Specify the full name of the file, including path.)

Answer: /etc/nologin

QUESTION: 109

Which of the following commands connects to the remote host example.com which has OpenSSH listening on TCP port 2222? (Choose TWO correct answers.)

1. ssh --port 2222 example.com
2. ssh -p 2222 example.com
3. ssh -o Port=2222 example.com
4. ssh -o GatewayPort=2222 example.com
5. ssh example.com:2222

Answer: B, C

QUESTION: 110

Which of the following commands preloads and manages keys that are used for automatic authentication while logging in to other machines using SSH?

1. sshd
2. ssh-agent
3. ssh-keygen
4. ssh-add

Answer: B

QUESTION: 111 CORRECT TEXT

Which file contains a set of services and hosts that will be allowed to connect to the server by going through a TCP Wrapper program such as tcpd? (Specify the full name of the file, including path.) lh3.googleusercontent.com/-5cd- clmKnbk/AAAAAAAAAAI/AAAAAAAAADM/-SXesH19Ido/s46-c-k- no/photo.jpg

Answer: /etc/hosts.allow

QUESTION: 112

Which configuration file would be edited to change the default options for outbound SSH sessions?

1. /etc/ssh/sshd_config
2. /etc/ssh/ssh
3. /etc/ssh/client
4. /etc/ssh/ssh_config
5. /etc/ssh/ssh_client

Answer: D

QUESTION: 113

Which of the following programs uses the hosts.allow file to perform its main task of checking for access control restrictions to system services?

1. tcpd
2. inetd
3. fingerd
4. mountd
5. xinetd

Answer: A

QUESTION: 114

Which of the following commands can be used to limit the amount of memory a user may use?

1. umask
2. usermod
3. ulimit
4. passwd
5. chage

Answer: C

QUESTION: 115

Which command is used to set restrictions on the size of a core file that is created for a user when a program crashes?

1. core
2. edquota
3. ulimit
4. quota

Answer: C

QUESTION: 116

When trying to unmount a device it is reported as being busy. Which of the following commands could be used to determine which process is causing this?

1. debug
2. lsof
3. nessus
4. strace
5. traceroute

Answer: B

QUESTION: 117 CORRECT TEXT

On a Linux system with shadow passwords enabled, which file in the file system

contains the password hashes of all local users? (Specify the full name of the file, including path.)

Answer: /etc/shadow

QUESTION: 118 CORRECT TEXT

Which directory holds the files that configure the xinetd service when using several

configuration files instead of an integrated configuration file? (Specify the full path to the directory.)

Answer: /etc/xinetd.d/, /etc/xinetd.d

QUESTION: 119 CORRECT TEXT

What argument to the -type option of find will match files that are symbolic links? (Specify only the argument and no other options or words.)

Answer: l

QUESTION: 120

Which configuration file would be edited to change default options for the OpenSSH server?

1. /etc/ssh/sshd_config
2. /etc/ssh/ssh
3. /etc/ssh/server
4. /etc/ssh/ssh_config
5. /etc/ssh/ssh_server

Answer: A

CompTIA LX0-104 Exam (CompTIA Linux+ [Powered by LPI] - 2) Detailed Information

LX0-104 - CompTIA Linux+ [Powered by LPI] - 2

---

LX0-104 Test Objectives

---

CompTIA Linux+

Certification Exam 2 Objectives

EXAM NUMBER: LX0-104

About the Exam

Candidates are encouraged to use this document to prepare for the CompTIA Linux+ LX0-104 exam. In order to receive CompTIA Linux+ certification, a candidate must pass two exams. The CompTIA Linux+ certification offers a framework for acquiring working knowledge of Linux for IT professionals working as junior-level system administrators, as well as those working in Web and software development. Successful candidates will have the following skills:

• Work at the Linux command line
• Perform easy maintenance tasks including assisting users, adding users to a larger system, executing backup & restore and shutdown & reboot
• Install and configure a workstation (including X) and connect it to a LAN, or a stand-alone PC via modem to the Internet in the design of capture solutions, while addressing security requirements

  EXAM DEVELOPMENT

  CompTIA exams result from subject matter expert workshops and industry-wide survey results regarding the skills and knowledge required of an entry-level IT professional.

   

  TEST DETAILS

  Required exam LX0-104
  Number of questions 60
  Type of questions Multiple choice
  Length of test 90 minutes
  Recommended experience A+, Network+ and at least 12 months
  of Linux administration experience
  Passing score 500 (on a scale of 200–800)

  EXAM OBJECTIVES (DOMAINS)

  The table below lists the domains measured by this examination and the extent to which they are represented:
  DOMAIN PERCENTAGE OF EXAMINATION
  105 Shells, Scripting and Data Management 17% 106 User Interfaces and Desktops 8%
• Administrative Tasks 20%
• Essential System Services 17%
• Networking Fundamentals 23%
• Security 15%
  Total 100%
  105 Shells, Scripting and Data Management

  105.1

  Customize and use the shell environment.
  • 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 used files, terms and utilities:
    • 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.
  • 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 used files, terms and utilities:
  • for
    • while
    • test
    • if
    • read
    • seq
    • exec

      105.3

      SQL data management.
      • Use of basic SQL commands
      • Perform basic data manipulation
      • The following is a partial list of the used files, terms and utilities:
        • insert
        • update
        • select
    • delete
    • from
    • where
    • group by
    • order by
    • join
      106 User Interfaces and Desktops

      106.1

      Install and configure X11.
      • 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 used files, terms and utilities:
        • /etc/X11/xorg.conf
        • xhost
        • DISPLAY
        • xwininfo
        • xdpyinfo
        • X

          106.2

          Set up a display manager.
      • 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 used files, terms and utilities:
        • lightdm
        • /etc/lightdm/

          106.3

          Accessibility.
      • Basic knowledge of keyboard accessibility settings (AccessX)
      • Basic knowledge of visual settings and themes
      • Basic knowledge of assistive technology (AT)
      • The following is a partial list of the used files, terms and utilities:
        • Sticky/repeat keys
        • Slow/bounce/toggle keys
        • Mouse keys
        • High contrast/large print desktop themes
        • Screen reader
    • Braille display
    • Screen magnifier
    • On-screen 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.
      • 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 used files, terms and utilities:
        • /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.
          • Manage cron and at jobs
          • Configure user access to cron and at services
          • Configure anacron
          • The following is a partial list of the used files, terms and utilities:
            • /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.
          • Configure local settings and environment variables
          • Configure timezone settings and environment variables
          • The following is a partial list of the used files, terms and utilities:
            • /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.
          • Set the system date and time
          • Set the hardware clock to the correct time in UTC
          • Configure the correct timezone
          • Basic NTP configuration
          • Knowledge of using the pool.ntp.org service
          • Awareness of the ntpq command
          • The following is a partial list of the used files, terms and utilities:
            • /usr/share/zoneinfo
            • /etc/timezone
            • /etc/localtime
            • /etc/ntp.conf
        • date
        • hwclock
        • ntpd
        • ntpdate
        • pool.ntp.org

          108.2

          System logging.
          • 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 used files, terms and utilities:
            • syslog.conf
            • syslogd
            • klogd
            • /var/log/
            • logger
        • logrotate
        • /etc/logrotate.conf
        • /etc/logrotate.d/
        • Journalctl
        • /etc/systemd/journald.conf
        • /var/log/journal/

          108.3

          Mail Transfer Agent (MTA) basics.
          • 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 used files, terms and utilities:
            • ~/.forward
            • sendmail emulation layer commands
            • newaliases
            • mail
        • mailq
        • postfix
        • sendmail
        • exim
        • qmail

      108.4

      Manage printers and printing.
      • 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 used files, terms and utilities:
        • CUPS configuration files, tools and utilities
        • /etc/cups
        • lpd legacy interface (lpr, lprm, lpq)
          109 Networking Fundamentals

          109.1

          Fundamentals of Internet protocols.
          • 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 used files, terms and utilities:
        • /etc/services
        • IPv4, IPv6
        • Subnetting
        • TCP, UDP, ICMP

      109.2

      Basic network configuration.
      • Manually and automatically configure network interfaces
      • Basic TCP/IP host configuration
      • Setting a default route
      • The following is a partial list of the used files, terms and utilities:
        • /etc/hostname
        • /etc/hosts
        • /etc/nsswitch.conf
        • ifconfig
          • ifup
          • ifdown
          • ip
          • route
          • ping

            109.3

            Basic network troubleshooting.
      • 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 used files, terms and utilities:
        • ifconfig
        • ip
        • ifup
        • ifdown
        • route
        • host
        • hostname
        • dig
      • netstat
      • ping
      • ping6
      • traceroute
      • traceroute6
      • tracepath
      • tracepath6
      • netcat

      109.4

      Configure client side DNS.
• 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 used files, terms and utilities:
  • /etc/hosts
  • /etc/resolv.conf
  • /etc/nsswitch.conf
  • Host
  • Dig
  • getent

109 Networking Fundamentals

110 Security

110.1

Perform security administration tasks.

• Audit a system to find files with the suid/sgid bit set
• Set or change user passwords and password aging information
• Being 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 used files, terms and utilities:
  • find
  • passwd
  • fuser
  • lsof
  • nmap
  • chage
  • netstat
  • sudo
  • /etc/sudoers

• su
• usermod
• ulimit
• who, w, last

  110.2

  Set up host security.
  • 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 used files, terms and utilities:
    • /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.
  • Perform basic OpenSSH 2 client configuration and usage
  • Understand the role of OpenSSH 2 server host keys
  • Perform basic GnuPG configuration, usage and revocation
  • Understand SSH port tunnels (including X11 tunnels)
  • The following is a partial list of the used files, terms and utilities:
    • 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/*

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