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NEW QUESTION # 14
A systems administrator is creating a backup copy of the /home/ directory. Which of the following commands allows the administrator to archive and compress the directory at the same time?
Answer: A
Explanation:
Creating backups is a core responsibility in Linux system management, and the Linux+ V8 objectives emphasize proper use of archiving and compression tools. The tar utility is the standard Linux tool for creating archive files, and it also supports compression through various options.
The command tar -cJf /backups/home.tar.xz /home/ correctly combines both archiving and compression in a single step. The -c option creates a new archive, -J specifies XZ compression, and -f allows the administrator to define the output file name. This results in a compressed archive of the entire /home/ directory, which is efficient for storage and transfer.
The other options are incorrect. cpio is an archiving tool but does not perform compression by itself without additional commands or pipelines. rsync -z compresses data during transfer but does not create an archive file.
The dd command performs low-level copying of raw data and is not suitable for directory-based backups.
Linux+ V8 documentation highlights tar as the preferred utility for filesystem backups due to its flexibility, reliability, and support for multiple compression algorithms. Therefore, the correct answer is C.
NEW QUESTION # 15
A systems administrator needs to restore a backup to the /usr/app/data directory. Which of the following commands should the administrator use for this task?
Answer: B
Explanation:
The tar (tape archive) utility is the standard tool for archiving and compressing files in Linux.
According to CompTIA Linux+ V8 objectives, administrators must be proficient in extracting data into specific target locations. The command tar -xvzf /tmp/backup.tar.gz -C /usr/app/data is the correct syntax for this operation.
The flags used in the command provide the following functionality:
-x: Instructs tar to extract the contents of the archive.
-v: Enables verbose output, showing the files as they are being extracted.
-z: Tells tar to filter the archive through gzip for decompression (required for .tar.gz files).
-f: Specifies the filename of the archive to be processed (/tmp/backup.tar.gz).
-C: Changes the directory to the specified path (/usr/app/data) before performing the extraction.
Using the -C flag is the most efficient and recommended way to restore a backup to a directory other than the current working directory. Without this flag, tar would extract the files into the current directory, which might not be the intended destination and could clutter the filesystem.
NEW QUESTION # 16
A Linux administrator is creating a symbolic link /home/docsleading to the
/usr/share/documents/directory. Which of the following commands allows the administrator to achieve this goal?
Answer: D
Explanation:
This command creates a symbolic link at the specified path that points to the target directory, allowing access to the target through the new link location.
NEW QUESTION # 17
A systems administrator is reconfiguring existing user accounts in a Linux system. Which of the following commands should the administrator use to include " myuser " in the finance group?
Answer: B
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
To add an existing user (myuser) to an existing group (finance) without removing them from other groups, the correct command is usermod -aG finance myuser. The -aG option appends the user to the supplementary group (s) specified.
Other options:
A). groupadd is for creating new groups, not adding users to groups.
B). groupmod is for modifying group properties, not user membership.
C). useradd creates new users; not applicable to existing users.
Reference:
CompTIA Linux+ Study Guide: Exam XK0-006, Sybex, Chapter 6: " User and Group Management " , Section: " Modifying Group Membership " CompTIA Linux+ XK0-006 Objectives, Domain 1.0: System Management
NEW QUESTION # 18
SIMULATION 1
A new drive was recently added to a Linux system. Using the environment and tokens provided, complete the following tasks:
- Create an appropriate device label.
- Format and create an ext4 file system on the new partition.
The current working directory is /.
INSTRUCTIONS
Use the drop-down menus to select the proper objects to complete these tasks.
Some commands are partially complete.
Not all objects will be used, and some may be used more than once.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
Answer:
Explanation:
Explanation:
mklabel gpt initializes the new disk /dev/sdc with a GPT partition table.
mkpart primary ext4 1 10G creates a primary partition using the ext4 type between 1MB and
10GB on /dev/sdc.
mkfs.ext4 /dev/sdc1 formats the newly created partition /dev/sdc1 with the ext4 filesystem, completing the setup.
NEW QUESTION # 19
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