LPIC-1 Timed Practice Test 1 — 10 Questions

Question 1

A system administrator needs to install a new kernel on a Debian-based system. Which TWO commands can be used to achieve this? (Choose TWO.)

Accepted Answer

apt-get install linux-image-5.10.0-20-amd64. Option C is correct because `apt-get install` is the standard command for installing a specific kernel package from the configured repositories on Debian-based systems. The package name `linux-image-5.10.0-20-amd64` corresponds to a precompiled kernel image that APT will download and install, automatically handling dependencies and updating the bootloader configuration.

Answer

apt-cache search linux-image-5.10.0-20-amd64

Answer

apt-get update

Answer

make install

Question 2

Which TWO of the following are valid methods to change the default runlevel on a SysV init-based system?

Accepted Answer

Edit /etc/inittab to set the initdefault line.. In SysV init-based systems, the default runlevel is defined in the /etc/inittab file by the 'initdefault' line, which specifies the runlevel the system should enter after boot. Editing this line is the standard method to permanently change the default runlevel. Option B correctly identifies this mechanism.

Answer

Use the 'runlevel' command to set the default runlevel.

Answer

Use 'systemctl set-default' to set the default runlevel.

Answer

Use the 'telinit' command to change the default runlevel.

Question 3

A system administrator notices that a server with a freshly installed Linux system fails to boot with the error 'No bootable device found'. The server has a single SATA hard disk connected to the motherboard's SATA controller. Which of the following is the most likely cause of this issue?

Accepted Answer

The BIOS boot order is set to a device that does not contain a bootable operating system.. The error 'No bootable device found' occurs during the BIOS/UEFI POST phase, before any bootloader is loaded. This indicates that the system firmware cannot find a valid boot sector on any device in its boot order. Since the server has a single SATA hard disk, the most likely cause is that the BIOS boot order is set to a different device (e.g., a network boot or removable media) that does not contain a bootable operating system, or the hard disk itself is not listed first in the boot priority.

Answer

The root filesystem is formatted with an unsupported filesystem type.

Answer

The kernel module for the SATA controller is not included in the initramfs.

Answer

The GRUB bootloader configuration file is missing or corrupted.

Question 4

Refer to the exhibit. A system administrator checks the integrity of the passwd package on a CentOS 7 system using rpm -V. Based on the output, what is the most likely cause of the 'missing' line?

Accepted Answer

The file /etc/security/passwd was deleted from the filesystem.. The 'missing' line in the rpm -V output indicates that the file /etc/security/passwd is not present on the filesystem. Since rpm -V verifies file attributes and existence against the RPM database, a missing file means it was deleted after installation. Option D correctly identifies this as the most likely cause.

Answer

The package was updated to a newer version that no longer includes this file.

Answer

The file /etc/security/passwd was modified after installation.

Answer

The package was not installed completely.

Question 5

Which THREE commands can be used to display the UUID of a filesystem on a Linux system without superuser privileges? (Choose three.)

Accepted Answer

file -s /dev/sda1. The `file -s /dev/sda1` command reads the superblock of the specified block device and displays filesystem type information, which typically includes the UUID for filesystems like ext4, XFS, or Btrfs. This works without superuser privileges because it only performs a read-only inspection of the device file's metadata, not requiring any write access or privileged system calls.

Answer

dumpe2fs -h

Answer

findfs UUID=...

Question 6

A systems administrator needs to change the permissions of the file /home/user/script.sh so that the owner can read, write, and execute; the group can read and execute; and others have no access. Which command accomplishes this?

Accepted Answer

chmod 750 /home/user/script.sh. Option B is correct because chmod 750 sets the permissions to rwxr-x---, which gives the owner read, write, and execute (7), the group read and execute (5), and others no access (0). This matches the requirement exactly.

Answer

chmod 755 /home/user/script.sh

Answer

chmod 770 /home/user/script.sh

Answer

chmod 741 /home/user/script.sh

Question 7

Which TWO commands can be used to view the contents of a compressed file named archive.tar.gz without extracting it to disk?

Accepted Answer

tar -tzf archive.tar.gz. Option C is correct because the `tar -tzf` command lists the contents of a tar archive compressed with gzip without extracting it. The `-t` flag tells tar to list the table of contents, `-z` handles the gzip decompression on the fly, and `-f` specifies the archive file. This is the standard, single-command method for viewing the contents of a `.tar.gz` file without writing any files to disk.

Answer

gzip -d archive.tar.gz

Answer

bunzip2 -c archive.tar.gz | tar -t

Answer

gunzip -l archive.tar.gz

Question 8

You are a systems administrator for a medium-sized company that runs a web server on a Linux host. The server has two physical disks: /dev/sda (250 GB) and /dev/sdb (500 GB). The root filesystem is on /dev/sda2, and /var is on /dev/sda3 (50 GB). The web application stores user-uploaded files in /var/www/uploads, which is part of the /var filesystem. Recently, /var has been running out of space because uploads have grown to 40 GB. You have added /dev/sdb1 (500 GB) and created an ext4 filesystem on it. You need to make the space available for uploads without disrupting the current file paths. The server must remain online during the process. Which of the following actions should you take?

Accepted Answer

Mount /dev/sdb1 on /mnt, copy /var/www/uploads to /mnt/uploads, then mount --bind /mnt/uploads /var/www/uploads.. Option D is correct because using a bind mount allows you to mount the new 500 GB filesystem at /mnt/uploads and then bind it to /var/www/uploads, preserving the existing file paths without moving or renaming anything. This operation can be performed online without unmounting /var or disrupting the web server, as bind mounts are a feature of the Linux kernel that make a mounted filesystem accessible at another directory.

Answer

Convert /var to use LVM by backing up, reformatting, and restoring data.

Answer

Create a symbolic link from /var/www/uploads to /dev/sdb1.

Answer

Move /var/www/uploads to /mnt/uploads and create a symbolic link from /var/www/uploads to /mnt/uploads.

Question 9

A system administrator notices that the /tmp directory is filling up quickly, causing applications to fail. The administrator wants to ensure that files in /tmp are automatically cleaned after a certain period. Which of the following is the best approach without installing additional software?

Accepted Answer

Configure the systemd-tmpfiles service with a configuration file to clean /tmp regularly.. Option D is correct because systemd-based Linux distributions include the systemd-tmpfiles service, which can be configured via files in /etc/tmpfiles.d/ to automatically clean temporary files based on age, size, or other criteria. This approach uses built-in systemd functionality without requiring additional software, and it is the recommended method for managing /tmp cleanup on modern systems.

Answer

Add a cron job that runs 'rm -rf /tmp/*' every hour.

Answer

Install tmpwatch and configure it to clean files older than 1 day.

Answer

Set the sticky bit on /tmp to automatically delete old files.

Question 10

Which TWO commands can be used to count the number of lines in a file named 'data.txt'?

Accepted Answer

wc -l data.txt. Option A is correct because `wc -l` specifically counts the number of newline characters in the file, which corresponds to the number of lines. Option B is correct because `awk 'END{print NR}'` processes the file line by line, and the built-in variable `NR` holds the total number of records (lines) processed when the END block is executed, thus outputting the line count.

Answer

cat data.txt | wc -c

Answer

grep -c '.*' data.txt

Answer

sed -n '$=' data.txt