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Topic 4: Essential System Services
- Mail Transfer Agent (MTA) basics – The applicants will be expected to perform basic alias and forward configuration on a client host, and they should also know about the commonly MTA programs that are currently available;
- Maintain system time – One has to know how to synchronize the clock through NTP. You should also be able to maintain the system time and date, configure the correct time zone, and perform the basic NTP configuration with the use of chrony and ntpd;
- Manage print queues and printing – You need to know how to use the LPD compatibility interface and CUPS to easily manage user print jobs.
- System logging – The individuals will learn how to work with rsyslog and also configure it. In this domain, they will also study the ways to configure the logging daemon to easily send log outputs to a log output or a central log server. Using the system journal subsystem will also be covered. Lastly, syslog-g and syslog as alternation logging systems will be required for learning;
Exam Domains Breakdown
The overall structure of 102-500 exam will encompass the following areas of knowledge:
- Shells and Shell Scripting
Students must be skilled in customizing the shell environment of Linux in order to meet user needs. They must also have to know how to write simple scripts, which includes the usage of standard sh syntax (for loops and tests), using command substitution, testing return values for success or failure, and more.
- Administrative Tasks
This domain is focused on managing users, group accounts, and related system files. It checks one’s skills in adding, modifying, and removing users and groups, automating system administration tasks by scheduling jobs and using cron and systemd timers. Finally, one will need to display competence with localization and internationalization, including locale configurations, settings for timezone, and utilizing LANG=C when scripting.
- Networking Fundamentals
This section deals with one’s understanding of TCP/IP network fundamentals and knowledge of network masks and CIDR notation. Additionally, candidates need to show that they can manage persistent network configurations of a Linux host, understand how to configure wi-fi network and ethernet using NetworkManager, and more. Candidates will also be tested on troubleshooting networking problems on client hosts and the ability to set up client side DNS.
Administrative tasks
Students who want to pass the LPI 102-500 exam are also expected to handle the following;
- Create various limited accounts that have a special purpose;
- Automate system administration activities with the help of jobs and their scheduling;
- Localization in addition to internationalization;
- Get the gist of systemd timer units;
- Control cron & at jobs and configure user access to them;
- Manage, transform, and delete group & user accounts and associated system files;
NEW QUESTION 75
FILL BLANK
When using X11 forwarding in SSH, what environment variable is automatically set in the remote shell in order to help applications to connect to the correct X11 server? (Specify only the environment variable without any additional commands or values.)
Answer:
Explanation:
DISPLAY
NEW QUESTION 76
Which of the following is a legacy program provided by CUPS for sending files to the printer queues on the command line?
- A. lpr
- B. lpp
- C. lpd
- D. lpq
Answer: A
NEW QUESTION 77
Which environment variable should be set in order to change the time zone for the commands run from within the environment variable's scope? (Specify the variable name only.)
Answer:
Explanation:
TZ
NEW QUESTION 78
What is the top-level directory which contains the configuration files for CUPS? (Specify the full path to the directory.)
Answer:
Explanation:
/etc/cups/ cups-files.conf
NEW QUESTION 79
Which of the following commands sets the system's time zone to the Canadian Eastern Time?
- A. sysctl -w clock.tz='Canada/Eastern'
- B. modprobe tz_ca_est
- C. localegen -t -f /usr/share/zoneinfo/Canada/Eastern > /etc/locate.tz
- D. ln -sf /usr/share/zoneinfo/Canada/Eastern /etc/localtime
- E. tzconf /etc/localtime
Answer: D
NEW QUESTION 80
What output will the following command produce?
seq 1 5 20
- A. 1
5
10
15 - B. 5
10
15
20 - C. 2
3
4
5 - D. 1
2
3
4 - E. 1
6
1
1
1
6
Answer: E
NEW QUESTION 81
What command can be used to generate syslog entries of any facility and priority? (supply just the command name without a path)
Answer:
Explanation:
logger
NEW QUESTION 82
Which of the following information is stored in /etc/shadow for each user?
- A. The timestamp of the user's last login
- B. The hashed password of the user
- C. The path to the user's home directory
- D. The user's private SSH keys
- E. The numerical user ID (UID)
Answer: B
NEW QUESTION 83
What is true regarding the file ~/.forward?
- A. Using ~/.forward, root may configure any email address whereas all other users may configure only their own addresses.
- B. By default, only ~/.forward files of users in the group mailq are processed while all other user's ~/
.forward files are ignored. - C. When configured correctly ~/.forward can be used to forward each incoming mail to one or more other recipients.
- D. As ~/.forward is owned by the MTA and not writable by the user, it must be edited using the editaliases command.
- E. After editing ~/.forward the user must run newaliases to make the mail server aware of the changes.
Answer: C
NEW QUESTION 84
Which of the following sections exists in a systemd timer unit?
- A. [Timer]
- B. [Trigger]
- C. [cron]
- D. [Events]
- E. [Schedule]
Answer: A
NEW QUESTION 85
Which command included in NetworkManager is a curses application which provides easy acces to the NetworkManager on the command line? (Specify only the command without any path or parameters.)
Answer:
Explanation:
nmtui
NEW QUESTION 86
Which of the following commands finds all files owned by root that have the SetUID bit set?
- A. find / -owner 0 -permbits 0x100000000
- B. find / -user root -perm -4000
- C. find / -owner root -setuid
- D. find / --filter uid=1 --filter pers=u+s
- E. find / -user 0 -mode +s
Answer: B
NEW QUESTION 87
With X11 forwarding in ssh, what environment variable is automatically set in the remote host shell that is not set when X11 forwarding is not enabled? (Specify only the environment variable without any additional commands or values.)
Answer:
Explanation:
DISPLAY, $DISPLAY
NEW QUESTION 88
Which of the following files is not read directly by a Bash login shell?
- A. ~/.bash_login
- B. ~/.profile
- C. ~/.bash_profile
- D. ~/.bashrc
- E. /etc/profile
Answer: D
NEW QUESTION 89
Which of the following lines are valid in the file /etc/hosts? (Choose TWO correct answers.)
- A. www.example.com,www 203.0.13.15,2001:db8::15
- B. www.example.com www 203.0.13.15
- C. 2003.0.113.15,2001:db8::15 www.example.com www
- D. 203.0.113.15 www.example.com www
- E. 2001:db8::15 www.example.com www
Answer: D,E
NEW QUESTION 90
Which command is used to add an empty group to the system? (Specify ONLY the command without any path or parameters.)
Answer:
Explanation:
groupadd, /usr/sbin/groupadd
NEW QUESTION 91
Which mechanism does ssh use to interact with the SSH agent?
- A. Starting ssh-agent as a child process for each ssh invocation.
- B. Connecting to port 2222 which is used by the system-wide SSH agent.
- C. Creating an alias replacing ssh with calls to ssh-agent.
- D. Using the fixed socket .ssh-agent/ipc.
- E. Evaluating environment variables such as SSH_AUTH_SOCK.
Answer: E
NEW QUESTION 92
Which of the following statements is valid in the file /etc/nsswitch.conf?
- A. namespaces: net mount procs
- B. multi on
- C. include /etc/nsswitch.d/
- D. 192.168.168.4 dns-server
- E. hosts: files dns
Answer: E
NEW QUESTION 93
An administrator wants to determine the geometry of a particular window in X, so she issues the __________
-metric command and then clicks on the window.
Answer:
Explanation:
/usr/bin/xwininfo, xwininfo
NEW QUESTION 94
You are looking into a new script you received from your senior administrator. In the very first line you notice a #! followed by a file path. This indicates that:
- A. The file at that location was used to make the script.
- B. This script provides identical functionality as the file at that location.
- C. The program at that location will be used to process the script.
- D. This script will self-extract into a file at that location.
Answer: C
NEW QUESTION 95
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