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CompTIA Linux+ Certification Exam Sample Questions (Q865-Q870):

NEW QUESTION # 865
A senior administrator has placed a private key for user admin in your home directory.
The server you need to remotely access is server1 and SSH is listening on port 2222.
INSTRUCTIONS
Part 1
Review the command output and build the correct command to place the private key into your SSH folder.
Part 2
Review the command output and build the correct command to set the file permissions.
Part 3
Review the command output and build the correct command to set the correct ownership.
In each part, click on objects to build a complete command. Command objects may be used more than once, but not all will be used. Use _ as the spacebar. Click the arrow to remove any unwanted objects from your command.
Part 4
Select the proper file to edit for remote server access. Then, build the correct configuration output based on the server name, ports, and files.

Answer:

Explanation:
See the Explanation part for detailed answer of each part.
Explanation:
Part 1
Here is the step-by-step command construction process:
1. Move the private key (likely named server1 based on the provided details) to the .ssh directory:
mv ~/server1 ~/.ssh/id_rsa
This command moves the private key (assuming it's named server1) from the home directory (~) to the .ssh directory and renames it to id_rsa (which is the default SSH private key file name).
2. Set the correct permissions for the private key file:
chmod 600 ~/.ssh/id_rsa
The private key file should be readable and writable only by the owner to maintain security.
3. Connect to the server using the private key and the correct port (2222):
ssh -i ~/.ssh/id_rsa -p 2222 admin@server1
This command tells ssh to use the specified private key (-i ~/.ssh/id_rsa), connect on port 2222 (-p 2222), and log in as the admin user on server1.
Part 2: Setting File Permissions
The correct command to set the file permissions based on the screenshots would likely involve using chmod.
Here is the command to set permissions correctly:
chmod 600 ~/.ssh/id_rsa
This restricts the private key's permissions so that only the user can read and write it.
Part 3: Setting Ownership
If ownership needs to be set, the command would look like this:
chown comptia:comptia ~/.ssh/id_rsa
This command ensures that the file is owned by the correct user (comptia) and the correct group (comptia).
In part 4, it asks you to select the proper file for editing to enable remote server access. Based on standard SSH configuration requirements, the proper file to edit for remote server access would be ~/.ssh/config.
Here's why:
* ~/.ssh/config: This file allows you to set up configuration options for different hosts, including specifying ports, user names, and the identity file (private key). You would add the necessary configuration for server1 to this file for easier access.
* Other options:
* ~/.ssh/authorized_keys: This file lists public keys that are authorized to log in to the local system.
It's not meant for configuring remote access to another server.
* ~/.ssh/known_hosts: This file stores the host keys of servers you've connected to. It doesn't allow for editing remote access settings.
* ~/.ssh/server1: This seems like a private key file or another custom file, but it's not typically used to configure SSH options.
For configuring access to server1 on port 2222, you would add a block like this to the ~/.ssh/config file:
Host server1
HostName server1
Port 2222
User admin
IdentityFile ~/.ssh/id_rsa

NEW QUESTION # 866
A Linux administrator is scheduling a system job that runs a script to check available disk space every hour. The Linux administrator does not want users to be able to start the job. Given the following:

The Linux administrator attempts to start the timer service but receives the following error message:

Which of the following is MOST likely the reason the timer will not start?

A. The checkdiskspace.timer should be started using the sudo command.
B. The timers.target should be reloaded to get the new configuration.
C. The checkdiskspace.timer should be configured to allow manual starts.
D. The checkdiskspace.timer unit should be enabled via systemctl.

Answer: C

Explanation:
The most likely reason the timer will not start is that the checkdiskspace.timer should be configured to allow manual starts. By default, systemd timers do not allow manual activation via systemctl start, unless they have RefuseManualStart=no in their [Unit] section. This option prevents users from accidentally starting timers that are meant to be controlled by other mechanisms, such as calendar events or dependencies. To enable manual starts for checkdiskspace.timer, the administrator should add RefuseManualStart=no to its [Unit] section and reload systemd.
The other options are not correct reasons for the timer not starting. The checkdiskspace.timer unit does not need to be enabled via systemctl enable, because enabling a timer only makes it start automatically at boot time or after a system reload, but does not affect manual activation. The timers.target does not need to be reloaded to get the new configuration, because reloading a target only affects units that have a dependency on it, but does not affect manual activation. The checkdiskspace.timer does not need to be started using the sudo command, because the administrator is already running systemctl as root, as indicated by the # prompt. Reference: systemd.timer(5) - Linux manual page; systemctl(1) - Linux manual page

NEW QUESTION # 867
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?

A. Terraform
B. Ansible
C. Puppet
D. Chef

Answer: D

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 # 868
A systems administrator needs to write a script that performs unattended package upgrades.
Which of the following flags should be used with either yum or apt to meet this goal?

A. -u
B. -y
C. -q
D. -d

Answer: A

NEW QUESTION # 869
A systems administrator is reviewing the following output on the text editor that is being used to update the company's internal database records:

Which of the following extensions should the systems administrator use when saving the file?

A. .json
B. .tf
C. .yaml
D. .sh

Answer: C

NEW QUESTION # 870
......

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