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Lpi Certification
102-500 Exam
Lpi.102-500.v2024-10-26.q213 Dumps

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Question 191

Which THREE statements about crontab are true?

A.Every user may have their own crontab.
B.hourly is the same as "0 * * * *".
C.Changing a crontab requires a reload/restart of the cron deamon.
D.The cron daemon reloads crontab files automatically when necessary.
E.A cron daemon must run for each existing crontab.

Correct Answer: A,B,D

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Question 192

Which of the following commands displays all environment and shell variables?

A.getargs
B.lsenv
C.ls
D.env
E.lsshell

Correct Answer: D

The command that displays all environment and shell variables is env. The env command prints a list of the current environment variables, which are variables that are defined for the current shell and are inherited by any child shells or processes. The env command can also be used to run another program in a custom environment without modifying the current one1. The env command is part of the GNU coreutils package and is available on most Linux systems2.
The other commands are not valid or do not display all environment and shell variables. The getargs command does not exist in Linux. The lsenv command is a utility to list information about IBM Power Systems firmware, not environment variables. The ls command lists the files and directories in the current working directory, not environment variables. The lsshell command is a utility to list the available shells on a system, not environment variables.
References:
* LPI Linux Essentials: 1.4. Using sudo
* LPI Linux Administrator: 102.5. Use Debian package management
* LPI Linux Engineer: 201.1. Measure and Troubleshoot Resource Usage
* LPI Linux Professional Certification Program
* https://linuxconfig.org/how-to-set-and-list-environment-variables-on-linux
* https://www.digitalocean.com/community/tutorials/how-to-read-and-set-environmental-and-shell-variables
* https://unix.stackexchange.com/questions/176001/how-can-i-list-all-shell-variables

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Question 193

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

A./etc/ssh/sshd_config
B./etc/ssh/ssh
C./etc/ssh/server
D./etc/ssh/ssh_config
E./etc/ssh/ssh_server

Correct Answer: A

The configuration file for the OpenSSH server is called sshd_config. It is typically located in /etc/ssh on most
*NIX systems, but is /etc/sshd_config in the case of MacOS X and perhaps other systems. OpenSSH has two different sets of configuration files: one for client programs (ssh, scp, and sftp) and one for the server daemon (sshd). System-wide SSH configuration information is stored in the /etc/ssh/ directory1. References: 1: Where is the configuration file for OpenSSH server?

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Question 194

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

Correct Answer:

/etc/sudoers

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Question 195

What is the default name of the configuration file for the Xorg X11 server? (Specify the file name only without any path.)

Correct Answer:

xorg.conf
Explanation:
The default name of the configuration file for the Xorg X11 server is xorg.conf. This file is used to store initial setup for X, such as settings for video cards, monitors, input devices, and other options. The Xorg X11 server is a display server that uses a configuration file called xorg.conf and files ending in the suffix .conf for its initial setup1. The xorg.conf file is typically located in /etc/X11/xorg.conf, but its location may vary across operating system distributions2. The xorg.conf file is not mandatory, as the Xorg X11 server can automatically configure most hardware and settings. However, it can be created and edited manually if needed3.
References:
* Xorg - ArchWiki
* xorg.conf - Wikipedia
* How to Configure X11 in Linux: 10 Steps (with Pictures) - wikiHow

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