PROVIDING YOU MARVELOUS 102-500 VALID TEST VCE WITH 100% PASSING GUARANTEE

Providing You Marvelous 102-500 Valid Test Vce with 100% Passing Guarantee

Providing You Marvelous 102-500 Valid Test Vce with 100% Passing Guarantee

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Lpi LPIC-1 Exam 102, Part 2 of 2, version 5.0 Sample Questions (Q233-Q238):

NEW QUESTION # 233
Each entry in a crontab must end with what character?

  • A. Newline
  • B. Backslash
  • C. Tab
  • D. Space

Answer: A

Explanation:
Each entry in a crontab file consists of six fields, specifying in the following order: minute, hour, day, month, weekday, and command1. Any of these fields can be set to an asterisk (*), which stands for "first through last." So, for example, to run a job every hour, put * in the hour field1. Each entry in a crontab file must end with a newline character (n), which indicates the end of a line2. A newline character is created by pressing the Enter key on the keyboard. The other options are not valid characters for ending a crontab entry. A tab or a space is used to separate each field, and a backslash is used to escape special characters or continue a long command to the next line2. Reference:
How to Use the Cron Job Format to Schedule Task in Linux
Syntax of crontab File Entries - Oracle.


NEW QUESTION # 234
How can a specific user be prevented from scheduling tasks with at?

  • A. By adding the specific user to the nojobs group.
  • B. By adding the specific user to the /etc/at.allow file.
  • C. By adding the specific user to the /etc/at.deny file.
  • D. By executing the atd --deny [user] command.
  • E. By adding the specific user to the [deny] section in the /etc/atd.conf file.

Answer: C


NEW QUESTION # 235
Which file lists which users can execute commands using sudo? (Specify the full name of the file, including path.)

Answer:

Explanation:
etcsudoers
Explanation:
The /etc/sudoers file lists which users can execute commands using sudo, as well as which commands they can run, on which hosts, and as which users. The /etc/sudoers file is the main configuration file for the sudo command, which allows users to run commands as another user, usually the superuser or root. The /etc/sudoers file has a specific syntax and should be edited only with the visudo command, which checks the file for errors and locks it to prevent concurrent edits. The /etc/sudoers file contains entries that follow the format:
user host = (runas) command
where user is the name of the user who can run sudo, host is the name of the host where the user can run sudo, runas is the name of the user as whom the command will be executed, and command is the name of the command or a list of commands that the user can run with sudo. For example, the entry:
alice ALL = (root) /bin/ls, /usr/bin/whoami
means that the user alice can run sudo on any host, and can execute the commands /bin/ls and /usr/bin/whoami as the root user. The /etc/sudoers file also supports aliases, variables, wildcards, and other features that make it more flexible and powerful. For more details, see the sudoers manual page.
Reference:
LPIC-1 Exam 102 Objectives, Topic 110: Security, Subtopic 110.2: Use sudo to manage access to the root account, Weight: 2, Key Knowledge Areas: Configure sudo and sudoers. Use sudo to execute commands as another user.
LPIC-1 Exam 102 Learning Materials, Topic 110: Security, Subtopic 110.2: Use sudo to manage access to the root account, Section 110.2.1: sudo and sudoers, Page 3-5.


NEW QUESTION # 236
What is true regarding the command sendmail?

  • A. With any MTA, the sendmail command must be run periodically by the cron daemon.
  • B. It is only available when the sendmail MTA is installed.
  • C. The sendmail command prints the MTAs queue history of which mails have been sent successfully.
  • D. All MTAs, including Postfix and Exim, provide a sendmail command.

Answer: D

Explanation:
The sendmail command is a generic interface to various mail transfer agents (MTAs), such as Sendmail, Postfix, Exim, Qmail, etc. The sendmail command is used to send emails from the command line or from other programs that need to deliver emails. The sendmail command accepts various flags and parameters to specify the sender, recipient, subject, body, and attachments of the email. The sendmail command also reads the standard input for the email content if no file is specified. The sendmail command is part of the sendmail package, which is the original and most widely used MTA for Unix-like systems. However, other MTAs, such as Postfix and Exim, also provide a sendmail command for compatibility reasons. The sendmail command provided by these MTAs may have slightly different syntax and options, but they all support the basic functionality of sending emails. Therefore, the statement that all MTAs, including Postfix and Exim, provide a sendmail command is true123.
The other statements are false. The sendmail command does not need to be run periodically by the cron daemon, as it is not a daemon itself, but a command-line tool. The sendmail command does not print the MTA's queue history, but rather sends the email to the MTA for delivery. The sendmail command is not only available when the sendmail MTA is installed, but also when other MTAs that provide a sendmail command are installed. References: 1: Linux Sendmail Command Help and Examples - Computer Hope 2: Send Email in Linux from Command Line | DigitalOcean 3: 5 Ways To Send Email from Linux Command Line - TecAdmin


NEW QUESTION # 237
Of the ways listed, which is the best method to temporarily suspend a user's ability to interactively login?

  • A. Change the user's password.
  • B. Use passwd -d username to give the user an empty password.
  • C. Use chage to expire the user account.
  • D. Add the command exit to the user's .login file.

Answer: C

Explanation:
The chage command can be used to change the expiration date of a user account. By setting the expiration date to a past date, the user account will be disabled and the user will not be able to login interactively. This is a temporary method, as the expiration date can be changed back to a future date or removed to re-enable the user account. The other options are either permanent, insecure, or ineffective. Option A is insecure, as it allows anyone to login as the user without a password. Option C is permanent, as it changes the user's password without saving the original one. Option D is ineffective, as it only affects the user's .login file, which is used by the csh and tcsh shells, and not by other shells such as bash or zsh. Therefore, option B is the best method to temporarily suspend a user's ability to interactively login. References:https://linuxconfig.org/disabling-user-logins-to-linux-system
https://askubuntu.com/questions/282806/how-to-enable-or-disable-a-user


NEW QUESTION # 238
......

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