CompTIA XK0-005 Practice Test - Questions Answers, Page 20

Theifcfgcommand is used to configure network interfaces on Linux systems. The-aoption displays information about all network interfaces, including their IP addresses, netmasks, gateways, and other parameters. This command can help the administrator obtain the network information from the statically assigned workstations before they are reconnected to the network.Reference: [Linux Networking: ifcfg Command With Examples]

Thechmodcommand is used to change the permissions of files and directories on Linux systems. Theg+soption sets the setgid bit on a directory, which means that all files and folders created inside that directory will inherit the group name of the parent directory. This command can help the developer ensure that all files and folders created inside the /GroupOODEV directory have the same group name as /GroupOODEV.Reference: [How to Use chmod Command in Linux with Examples]

Thesucommand is used to switch to another user account on Linux systems. The-option makes the shell a login shell, which means that it will read the profile and environment variables of the target user. Without this option, the shell will retain the environment variables of the original user. This can cause confusion when issuing commands that depend on these variables, such asls, which uses the$HOMEvariable to determine the home directory. Therefore, Ann should have issuedsu - Joeto list Joe's files instead of her own.Reference: [How to Use su Command in Linux with Examples]

Thehttpd.serviceis the Apache HTTPD Server, which is a web service that runs on Linux systems. The output 1 shows that thehttpd.serviceisinactive (dead), which means that it is not running. The output 1 also shows that thehttpd.serviceisdisabled, which means that it is not enabled to auto start at boot time. Therefore, the statements C and D best describe the root cause of the issue. The statements A, B, E, and F are incorrect because they do not match the output 1.Reference: [How to Manage Systemd Services on a Linux System]

Thesshdis the Secure Shell Daemon, which is a service that allows remote login to a Linux system using the SSH protocol. The output shows that thesshdis running on port2222, which is a non-standard port for SSH. The default port for SSH is22, which is what the user is trying to use. Therefore, the statement B is most likely causing the issue. The statements A, C, and D are incorrect because they do not explain why the user cannot log on using port 22.Reference: [How to Change SSH Port in Linux]

Therpmcommand is used to manage RPM packages on Linux systems. The-qfoption queries the package name that provides a given file. Therefore, the commandrpm -qf /bin/someappwill show the RPM package name that provides the binary file/bin/someapp. The statements B, C, and D are incorrect because they do not query the package name, but rather verify, remove, or install a package.Reference: [How to Use RPM Command in Linux with Examples]

These commands will unmask the mariadb service, which is currently prevented from starting, and then start it normally. The other commands are either not relevant, not valid, or not sufficient for this task. For more information on how to manage masked services with systemctl, you can refer to the web search result1.

The best task to perform to resolve this issue is B. Remove the entry for portal.comptia.org from the local hosts file. This is because the local hosts file has a wrong entry that maps portal.comptia.org to 10.10.10.55, which is different from the actual IP address of 192.168.1.55 that is returned by the DNS server. This causes a mismatch and prevents the workstation from accessing the website. By removing or correcting the entry in the hosts file, the workstation will use the DNS server to resolve the domain name and access the website successfully.

To remove or edit the entry in the hosts file, you need to have root privileges and use a text editor such as vi or nano. For example, you can run the command:

sudo vi /etc/hosts

and delete or modify the line that says:

10.10.10.55 portal.comptia.org

Then save and exit the file.

The best command to use to transfer the local file accounts.pdf to the remote /tmp directory of the server with the IP address 10.10.10.80 is B. scp accounts.pdf [email protected]:/tmp. This command will use the secure copy protocol (scp) to copy the file from the local machine to the remote server over SSH. The command requires the username and password of the user on the remote server, as well as the full path of the destination directory.

The other commands are either incorrect or not suitable for this task. For example:

A) rsync [email protected]:/tmp accounts.pdf will try to use the rsync command to synchronize files between the local and remote machines, but it has the wrong syntax and order of arguments. The source should come before the destination, and a colon (:) should separate the remote host and path.

C) cp [email protected]:/tmp accounts.pdf will try to use the cp command to copy files, but it does not work over SSH and it has the wrong syntax and order of arguments. The source should come before the destination, and a colon (:) should separate the remote host and path.

D) ssh accounts.pdf [email protected]:/tmp will try to use the ssh command to log into the remote server, but it has the wrong syntax and arguments. The username should come before the remote host, and a file name is not a valid argument for ssh.