LPIC-1 Quick Quiz — 10 Questions

Question 1

Which TWO commands can be used to display the current runlevel of a SysV init system?

Accepted Answer

who -r. The `who -r` command displays the current runlevel and the time it was last changed, making it a valid way to check the runlevel in a SysV init system. The `runlevel` command directly outputs the previous and current runlevel, which is the standard tool for this purpose.

Answer

init 3

Answer

telinit

Answer

systemctl get-default

Question 2

A system administrator notices that the system boots to the graphical interface but wants to change it to boot to a non-graphical multi-user target. Which command will make this change persistent?

Accepted Answer

systemctl set-default multi-user.target. `systemctl set-default multi-user.target` changes the default systemd target to `multi-user.target`, which boots to a non-graphical multi-user environment. This change is persistent across reboots, as it updates the symlink `/etc/systemd/system/default.target` to point to `multi-user.target`.

Answer

systemctl isolate multi-user.target

Answer

systemctl enable multi-user.target

Answer

systemctl start multi-user.target

Question 3

An administrator wants to change the ownership of a file to user 'jane' and group 'staff'. Which command should be used?

Accepted Answer

chown jane:staff file. The `chown` command with the syntax `chown user:group file` changes both the user and group ownership of a file in a single command. This is the standard POSIX syntax, where a colon separates the user and group names, allowing the administrator to set ownership to user 'jane' and group 'staff' atomically.

Answer

chown jane.staff file

Answer

chgrp jane staff file

Answer

chown jane staff file

Question 4

An administrator wants to add a kernel parameter 'quiet splash' to the default boot entry. Which file should be edited?

Accepted Answer

/etc/default/grub. The correct file to edit is /etc/default/grub because it is the main configuration file for GRUB 2 where kernel boot parameters like 'quiet splash' are defined in the GRUB_CMDLINE_LINUX_DEFAULT variable. After editing this file, the administrator must run update-grub (or grub-mkconfig) to regenerate the actual boot configuration file /boot/grub/grub.cfg.

Answer

/etc/grub.d/00_header

Answer

/etc/grub.conf

Answer

/boot/grub/grub.cfg

Question 5

Refer to the exhibit. The root filesystem is at 95% capacity. Which option will free space on the root filesystem?

Accepted Answer

Move /var/log to /mnt/backup and create a symlink. Moving the /var/log directory to a separate partition or filesystem (e.g., /mnt/backup) and creating a symbolic link from /var/log to the new location frees space on the root filesystem without losing log data. This approach preserves the filesystem hierarchy and allows logs to continue growing on a different volume, preventing the root filesystem from filling up.

Answer

Resize /dev/sda1 using resize2fs

Answer

Delete all files in /var/log

Answer

Move /home to /mnt/backup and create a symlink

Question 6

A system administrator notices that a server with an ext4 filesystem fails to boot after editing /etc/fstab. The error message indicates that the root filesystem cannot be mounted. Which of the following is the most likely cause?

Accepted Answer

The UUID or device name for the root filesystem is incorrect.. If the UUID or device name for the root filesystem in /etc/fstab is incorrect, the kernel cannot locate the root device during boot, resulting in a mount failure. The init process reads /etc/fstab to mount the root filesystem, and any mismatch—such as a typo in the UUID or a stale device path—will cause the system to drop into emergency mode.

Answer

The root filesystem is mounted read-only.

Answer

The swap partition entry is missing.

Answer

The filesystem type is specified as 'auto' instead of 'ext4'.

Question 7

Refer to the exhibit. On boot, which filesystem will be checked first by fsck?

Accepted Answer

The root filesystem (/). The root filesystem (/) is checked first by fsck because it is mounted read-only during the initial boot phase, and fsck must verify its integrity before the system can proceed to mount other filesystems. The order of filesystem checks is determined by the fs_passno field in /etc/fstab, where the root filesystem typically has a passno of 1, ensuring it is checked before any filesystem with a higher passno value.

Answer

The swap partition

Answer

The CD-ROM device

Answer

The /boot filesystem

Question 8

The system is unable to mount a filesystem that should be identified by UUID 1234-5678. The administrator checks /etc/fstab and finds the entry: UUID=1234-5678 /data ext4 defaults 0 2. What is the most likely cause of the mount failure?

Accepted Answer

The symlink for UUID 1234-5678 is broken.. The most likely cause is that the symbolic link for UUID 1234-5678 is broken. In Linux, UUID-based mounts in /etc/fstab rely on symlinks in /dev/disk/by-uuid/ that point to the actual block device. If the symlink is missing or points to a non-existent device (e.g., after a disk reorder or hardware change), the system cannot resolve the UUID to a device, causing the mount to fail even if the filesystem itself is intact.

Answer

The /data mount point does not exist.

Answer

The device /dev/sda1 is not formatted with ext4.

Answer

The UUID in the fstab entry is incorrect.

Question 9

Which TWO commands can be used to display information about the CPU(s) in a Linux system? (Choose two.)

Accepted Answer

cat /proc/cpuinfo. Options D and E are both correct. `cat /proc/cpuinfo` reads the virtual file /proc/cpuinfo which the kernel populates with detailed CPU information for each core, such as model name, cache size, and flags. `lscpu` is a utility that collects CPU information from /proc/cpuinfo and sysfs, presenting it in a human-readable tabular format. Both commands are standard on Linux for displaying CPU details.

Answer

uname -m

Answer

lsusb

Answer

cpufreq-info

Question 10

Arrange the steps to configure a static IP address on a Linux system using the command line.

Accepted Answer

Step 1: Open the network configuration file (e.g., /etc/network/interfaces).
Step 2: Configure the interface with static IP, netmask, gateway, and DNS.
Step 3: Save and exit the file.
Step 4: Restart the networking service.. Static IP configuration requires editing the appropriate config file, then restarting networking to apply changes.

Answer

Step 1: Restart the networking service.
Step 2: Open the network configuration file.
Step 3: Configure the interface with static IP, netmask, gateway, and DNS.
Step 4: Save and exit the file.

Answer

Step 1: Open the network configuration file.
Step 2: Save and exit the file.
Step 3: Configure the interface with static IP, netmask, gateway, and DNS.
Step 4: Restart the networking service.

Answer

Step 1: Configure the interface with static IP, netmask, gateway, and DNS.
Step 2: Restart the networking service.
Step 3: Open the network configuration file.
Step 4: Save and exit the file.