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NEW QUESTION # 38
A Linux administrator wants to make the enable_auth variable set to 1 and available to the environment of subsequently executed commands. Which of the following should the administrator use for this task?
Answer: A
Explanation:
Environment variables in Linux can exist either locally within a shell or be exported to child processes.
CompTIA Linux+ V8 emphasizes the distinction between shell variables and environment variables, as this affects how applications inherit configuration values.
Option D, export ENABLE_AUTH=1, is the correct choice because it both assigns the variable and marks it for export to the environment. Once exported, the variable becomes available to all subsequently executed commands and child processes spawned from the current shell. This behavior is required when applications or scripts rely on environment variables for configuration.
Option B, ENABLE_AUTH=1, only sets a shell-local variable. While it is accessible within the current shell session, it is not inherited by child processes unless explicitly exported. Option A, let ENABLE_AUTH=1, performs arithmetic evaluation and does not export the variable. Option C incorrectly assigns the output of a command substitution and does not set the desired value.
Linux+ V8 documentation highlights export as the correct mechanism for making variables available system- wide within a user session. Therefore, the correct answer is D.
NEW QUESTION # 39
An administrator needs to verify the user ID, home directory, and assigned shell for the user named " accounting. " Which of the following commands should the administrator use to retrieve this information?
Answer: C
Explanation:
User account information is centrally stored in the system's account databases, and Linux+ V8 emphasizes the use of standard tools to query this data safely and consistently.
The getent passwd accounting command retrieves the user's entry from the passwd database, which may be sourced from local files or network services such as LDAP. This entry includes the username, user ID (UID), group ID (GID), home directory, and assigned login shell. Therefore, option A provides all the requested information in a single command.
Option B, id accounting, displays the UID and group memberships but does not show the home directory or assigned shell. Option C is incorrect because /etc/shadow contains password hashes and expiration data, not shell or home directory information. Option D, who accounting, only shows login sessions and does not provide account configuration details.
Linux+ V8 documentation highlights getent passwd as the preferred method for retrieving comprehensive user account information because it works across different authentication backends.
Thus, the correct answer is A.
NEW QUESTION # 40
A systems administrator is deploying a web server using the following code:
Which of the following technologies is the administrator using to create this web server?
Answer: B
Explanation:
The code uses Chef's Ruby DSL for defining a role with name, description, run_list, and default_attributes, which are constructs specific to Chef.
NEW QUESTION # 41
An administrator adds new DNS servers to the network environment. Which of the following files should the administrator modify?
Answer: B
Explanation:
The /etc/resolv.conf file is used to define DNS name servers that the system uses for hostname resolution, so adding new DNS servers requires modifying this file.
NEW QUESTION # 42
Which of the following describes the primary purpose of monitoring thresholds?
Answer: A
Explanation:
Monitoring thresholds define acceptable limits for metrics and are primarily used to trigger alerts when those limits are exceeded, allowing administrators to respond before issues escalate.
NEW QUESTION # 43
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