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Lpi LPIC-1 Exam 101, Part 1 of 2, version 5.0 Sample Questions (Q268-Q273):

NEW QUESTION # 268
Which of the following commands prints a list of usernames (first column) and their primary group (fourth column) from the /etc/passwd file?

A. sort -t : -k 1,4 /etc/passwd
B. paste -f 1,4 /etc/passwd
C. split -c 1,4 /etc/passwd
D. fmt -f 1,4 /etc/passwd
E. cut -d : -f 1,4 /etc/passwd

Answer: E

Explanation:
The command that prints a list of usernames (first column) and their primary group (fourth column) from the
/etc/passwd file is cut -d : -f 1,4 /etc/passwd. The cut command is used to extract selected fields or characters from each line of a file or standard input. The -d or --delimiter option specifies the character that separates the fields, which in this case is a colon (:). The -f or --fields option specifies the fields to be printed, which in this case are the first and the fourth fields. The /etc/passwd file is a text file that contains information about the user accounts on the system, such as the username, password, user ID, group ID, home directory, and login shell. The first column of the file is the username and the fourth column is the group ID, which corresponds to the primary group of the user. The cut command will print these two columns separated by a colon for each line of the file. For example, running cut -d : -f 1,4 /etc/passwd will produce an output like this:
root:0 daemon:1 bin:1 sys:3 sync:4 games:5 man:12 lp:7 mail:8 news:9 uucp:10 proxy:13 www-data:33 backup:34 list:38 irc:39 gnats:41 nobody:65534 systemd-network:100 systemd-resolve:101 syslog:102 messagebus:103 _apt:104 lxd:105 uuidd:106 dnsmasq:107 sshd:108 pollinate:109 vboxadd:999 ubuntu:1000 The other commands are either invalid or do not perform the desired task. The fmt command is used to reformat paragraphs of text, but it does not have a -f option. The sort command is used to sort lines of text, but it does not have a -t option. The paste command is used to merge lines of files, but it does not have a -f option.
The split command is used to split a file into pieces, but it does not have a -c option. References:
* Linux Essentials - Linux Professional Institute Certification Programs
* Exam 101 Objectives - Linux Professional Institute
* cut(1) - Linux manual page
* /etc/passwd file - Linux.com

NEW QUESTION # 269
Which of the following kernel parameters instructs the kernel to suppress most boot messages?

A. nomesg
B. quiet
C. silent
D. verbose=0

Answer: B

Explanation:
The quiet kernel parameter instructs the kernel to suppress most boot messages, except for critical errors12. The quiet parameter can be added to the GRUB_CMDLINE_LINUX_DEFAULT variable in the /etc
/default/grub file and then run sudo update-grub to apply the changes3. The quiet parameter can also be used in combination with other parameters, such as splash, to enable a graphical boot screen4.
The other options in the question are not valid or do not have the same functionality as the quiet parameter:
* silent: There is no such kernel parameter in Linux.
* verbose=0: This parameter is used to set the verbosity level of the kernel messages, but it does not suppress them completely. The valid values for this parameter are from 0 (quiet) to 7 (debug)5.
* nomesg: This parameter is used to disable all kernel messages on the console, including the emergency ones. This parameter is not recommended for normal use, as it can hide critical errors and prevent troubleshooting.
:
1: Getting the Kernel Command-Line Parameters | Baeldung on Linux 2: How to mute kernel messages at startup in Arch Linux? 3: boot - How to turn off the filesystem check message which occures while booting - Ask Ubuntu 4: [How to enable a graphical boot screen on Ubuntu 18.04 LTS - LinuxConfig.org] 5: [Kernel parameters - ArchWiki] : [Linux Kernel Parameters - SysTutorials]

NEW QUESTION # 270
What does the command mount -a do?

A. It opens an editor with root privileges and loads /etc/fstab for editing.
B. It ensures that all file systems listed with the option noauto in /etc/fstab are mounted.
C. It ensures that all file systems listed in /etc/fstab are mounted regardless of their options.
D. It ensures that all file systems listed with the option auto in /etc/fstab are mounted.
E. It shows all mounted file systems that have been automatically mounted.

Answer: D

NEW QUESTION # 271
Which of the following commands will send output from the program myapp to both standard output (stdout) and the file file1.log?

A. cat < myapp | cat > file1.log
B. myapp | cat > file1.log
C. tee myapp file1.log
D. myapp | tee file1.log
E. myapp 0>&1 | cat > file1.log

Answer: D

NEW QUESTION # 272
Which of the following is true when a file system, which is neither listed in /etc/fstab nor known to system, is mounted manually?

A. systemd ignores any manual mounts which are not done using the systemctl mount command
B. systemctl unmount must be used to remove the mount because system opens a file descriptor on the mount point
C. The command systemctl mountsync can be used to create a mount unit based on the existing mount
D. systemd automatically generates a mount unit and monitors the mount point without changing it
E. Unless a systemd mount unit is created, systemd unmounts the file system after a short period of time

Answer: D

Explanation:
Systemd is a system and service manager for Linux systems, and it can manage the mounting and unmounting of file systems. Systemd can automatically create and start mount units for file systems that are listed in /etc
/fstab or are known to the system. Mount units are unit files that encode information about a file system mount point controlled and supervised by systemd. Mount units must be named after the mount point directories they control, and they have the suffix .mount. For example, the mount point /home must be configured in a unit file home.mount.
Systemd can also handle file systems that are neither listed in /etc/fstab nor known to the system, but are mounted manually by the user. In this case, systemd automatically generates a transient mount unit and monitors the mount point without changing it. A transient mount unit is a unit that is created dynamically and temporarily, and is not backed by a unit file on disk. A transient mount unit has the same name and properties as a regular mount unit, but it is not persistent across reboots. Systemd does not interfere with the manual mount, and does not unmount it unless explicitly requested by the user. The user can use the mount command or the systemd-mount command to create a manual mount, and the umount command or the systemd-umount command to remove it. The user can also use the systemctl command to inspect and control the transient mount unit. For example, to show the status of the transient mount unit for the mount point /mnt, use the following command:
systemctl status mnt.mount
References:
systemd.mount - freedesktop.org
systemd-mount - freedesktop.org
How to name systemd mount unit properly? - Server Fault
Working with Systemd Mount Units - Pluralsight

NEW QUESTION # 273
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