LPIC-1 Practice Exam 2 — 20 Questions

Question 1

After creating a new user with 'useradd john', the user 'john' cannot log in. What is the most likely cause?

Accepted Answer

No password has been set for the user. The `useradd` command creates a new user account but does not set a password. Without a password, the system's authentication mechanism (typically PAM) will deny login attempts, as there is no valid password hash in `/etc/shadow`. The user must have a password assigned via `passwd john` before they can authenticate.

Answer

The home directory does not exist

Answer

The user's shell is not set

Answer

The user is not in the sudoers file

Question 2

Refer to the exhibit. A system administrator finds this line in /etc/rsyslog.conf. What is the effect of this configuration?

Accepted Answer

All syslog messages are forwarded via UDP to the server at 192.168.1.100 on port 514.. The line `*.* @192.168.1.100:514` in rsyslog.conf uses the `@` symbol to indicate UDP forwarding. The `*.*` selector means all facilities and all priorities, so every syslog message is forwarded via UDP to the server at 192.168.1.100 on port 514. This is a standard rsyslog syntax for remote logging.

Answer

Only messages with facility *.info are forwarded.

Answer

All syslog messages are forwarded via TCP to the server.

Answer

Only authentication-related messages are forwarded.

Question 3

On a Fedora system, which command is used to update all installed packages to their latest versions?

Accepted Answer

`dnf upgrade`. On Fedora, `dnf upgrade` is the correct command to update all installed packages to their latest versions. It synchronizes the local package database with the repositories and upgrades every installed package that has a newer version available, handling dependencies automatically.

Answer

`dnf check-update`

Answer

`dnf update all`

Answer

`dnf install update`

Question 4

Which THREE of the following are valid symbolic mode expressions for the chmod command?

Accepted Answer

u+x. Option A (u+x) is a valid symbolic mode because it specifies the user class 'u' and adds (+) the execute permission, which is standard chmod symbolic syntax. Option C (a+rwx) is valid because 'a' represents all three permission classes (user, group, and other) and +rwx grants read, write, and execute to each. Option E (g-w) is valid because it targets the group class 'g' and removes (-) the write permission. Option B (755) is not a symbolic mode but an octal (numeric) mode, which uses digits rather than letters and operators. Option D (c+r) is invalid because 'c' is not a recognized permission class in chmod; the valid classes are u, g, o, and a.

Answer

755

Answer

c+r

Question 5

A shell script uses the variable expansion ${var:-default} to set a default value for an environment variable. The script prints unexpected output when the variable is set to an empty string. Which expansion should be used to ensure the default is only used when the variable is unset, not when it is empty?

Accepted Answer

${var-default}. The expansion `${var-default}` uses the default value only when the variable is unset (i.e., does not exist at all). In contrast, `${var:-default}` also substitutes the default when the variable is set but empty, which causes the unexpected output described in the question. The colon in the expansion is the critical difference: it adds the check for a null or empty string.

Answer

${var:-default}

Answer

${var:?default}

Answer

${var:=default}

Question 6

A DHCP server assigns IP addresses to clients, but some clients are not receiving the correct gateway. Which configuration file should be checked on the DHCP server?

Accepted Answer

/etc/dhcp/dhcpd.conf. The DHCP server configuration file on Linux systems is typically located at /etc/dhcp/dhcpd.conf (or /etc/dhcpd.conf on some older distributions). This file contains the subnet declarations, option definitions (such as option routers for the default gateway), and other parameters that the DHCP server uses to assign IP addresses and configuration details to clients. If clients are not receiving the correct gateway, the 'option routers' directive within this file should be checked and corrected.

Answer

/etc/dhcpd.conf

Answer

/etc/dhcp/dhclient.conf

Answer

/etc/resolv.conf

Question 7

A server has two disk drives: /dev/sda (SSD) and /dev/sdb (HDD). The administrator wants to place frequently accessed files on the SSD for performance. Which approach best achieves this using Linux filesystem features?

Accepted Answer

Create separate LVM logical volumes on each disk and mount them at different mount points.. LVM allows the administrator to create separate logical volumes on each physical disk (/dev/sda and /dev/sdb) and mount them at distinct mount points. By placing frequently accessed files on the SSD logical volume and less critical data on the HDD logical volume, the administrator can directly control which files benefit from the SSD's faster performance without mixing data or requiring complex overlays.

Answer

Configure RAID 0 across both disks to combine speed.

Answer

Use symbolic links to redirect file access to the SSD.

Answer

Use a union mount to overlay the SSD on top of the HDD.

Question 8

An administrator needs to replace all occurrences of 'old_host' with 'new_host' in the file /etc/hosts. Which sed command should be used?

Accepted Answer

sed -i 's/old_host/new_host/g' /etc/hosts. The `-i` flag enables in-place editing of the file, and the `g` flag (global) ensures all occurrences on each line are replaced, not just the first. The command `sed -i 's/old_host/new_host/g' /etc/hosts` modifies the file directly, replacing every instance of 'old_host' with 'new_host' throughout the file.

Answer

sed -n 's/old_host/new_host/gp' /etc/hosts

Answer

sed -i 's/old_host/new_host/' /etc/hosts

Answer

sed 's/old_host/new_host/g' /etc/hosts

Question 9

A company is setting up a database server that requires high reliability and support for snapshots. The storage will be on a single large disk. Which filesystem is best suited for this requirement?

Accepted Answer

btrfs. Btrfs (B-tree filesystem) is best suited for this requirement because it natively supports snapshots, checksumming, and copy-on-write (CoW) for high reliability, all on a single disk. Unlike other Linux filesystems, btrfs provides built-in snapshot and rollback capabilities without requiring an external volume manager, making it ideal for database servers needing consistent point-in-time backups.

Answer

ext4

Answer

NTFS

Answer

XFS

Question 10

Which three options are valid ways to install a package 'curl' on a RHEL 8 system? (Choose three.)

Accepted Answer

`dnf install curl`. `dnf` is the default package manager on RHEL 8, replacing `yum` for handling RPM packages with automatic dependency resolution. It directly installs the `curl` package from configured repositories.

Answer

`apt-get install curl`

Answer

`zypper install curl`

Question 11

A data center server with two NICs (eth0 and eth1) is configured for network bonding in mode 1 (active-backup). The admin notices that after a cable pull on eth0, the bond interface fails over to eth1 as expected. However, when the cable is reconnected to eth0, the bond remains on eth1 indefinitely. The admin checks /proc/net/bonding/bond0 and sees that eth0 is marked as 'up' but not as 'active'. Which parameter is most likely missing from the bond configuration? Options: A) 'miimon=100' to enable link monitoring, B) 'downdelay=0', C) 'updelay=0', D) 'primary=eth0' to prefer eth0 as the active slave.

Accepted Answer

primary=eth0. The bond is in active-backup mode (mode 1) and eth0 is marked as 'up' but not 'active' after reconnection. Without the 'primary=eth0' parameter, the bond does not automatically switch back to the preferred slave (eth0) once it becomes available; it only fails over to eth1 when eth0 goes down. Setting 'primary=eth0' ensures that eth0 is always preferred as the active slave when it is in 'up' state, triggering a failback.

Answer

updelay=0

Answer

downdelay=0

Answer

miimon=100

Question 12

On a systemd-based system, which file is NOT used for system initialization?

Accepted Answer

/etc/inittab. /etc/inittab is the configuration file used by the traditional SysV init system to define runlevels and control terminal getty processes. On a systemd-based system, systemd does not read /etc/inittab; instead, it uses unit files and targets to manage system initialization, making this file unused for that purpose.

Answer

/etc/fstab

Answer

/etc/systemd/system/default.target

Answer

/lib/systemd/system/sysinit.target

Question 13

Which THREE steps are required to configure a network interface with a static IP address using the ip command (assuming interface eth0)? (Choose three.)

Accepted Answer

ip route add default via 192.168.1.1. The `ip route add default via 192.168.1.1` command sets the default gateway for the system, which is essential for routing traffic to networks beyond the local subnet. Without a default route, the static IP configuration would only allow communication within the local network (192.168.1.0/24), making this step mandatory for full network connectivity.

Answer

ifconfig eth0 192.168.1.10 netmask 255.255.255.0

Answer

echo 'nameserver 8.8.8.8' > /etc/resolv.conf

Question 14

A Linux administrator needs to install a single Debian package file named 'custom-tool_2.1.0_amd64.deb' that was downloaded from a vendor's website. The package has several dependencies that are not currently installed, and the administrator wants the package manager to automatically resolve and install those dependencies from the configured repositories. Which command should the administrator use?

Accepted Answer

apt install ./custom-tool_2.1.0_amd64.deb. The correct approach is to use apt install with the local .deb file path, as apt can handle both local package installation and dependency resolution from repositories. Using dpkg alone would install the package but leave dependencies unresolved, while forcing installation ignores the problem. Using apt-get with just the package name would fail because the package is not in a repository.

Answer

dpkg --install --force-depends custom-tool_2.1.0_amd64.deb

Answer

apt-get install custom-tool

Answer

dpkg -i custom-tool_2.1.0_amd64.deb

Question 15

Based on the dpkg -l output in the exhibit, what does the 'rc' status indicate for the apache2 package?

Accepted Answer

The package was removed but configuration files remain.. In dpkg, the 'rc' status means the package has been removed (the 'r' flag) but its configuration files remain on the system (the 'c' flag). This occurs when you use 'apt-get remove' or 'dpkg -r' without the --purge option, leaving behind files like /etc/apache2/*. The 'c' indicates that the package's conffiles (as listed in its control data) have not been deleted, allowing for potential reinstallation with previous settings preserved.

Answer

The package is unpacked but not configured.

Answer

The package is installed and configured.

Answer

The package is completely purged.

Question 16

Refer to the exhibit. The 'mount -a' command fails for the NFS mount. What is the most likely cause?

Accepted Answer

The NFS server is not exporting the directory or is unreachable.. The 'mount -a' command reads /etc/fstab and attempts to mount all entries. For an NFS mount, the most common failure is that the NFS server is not exporting the specified directory or is unreachable, which causes the mount to fail with an error like 'mount.nfs: access denied by server while mounting' or 'mount.nfs: No route to host'. This is the correct answer because network-based filesystem mounts depend on server availability and export configuration.

Answer

The local mount point /mnt/nfs does not exist.

Answer

The filesystem type 'nfs' is not supported by the kernel.

Answer

The 'defaults' option is missing for the NFS entry.

Question 17

A small business runs a Linux server hosting a web application and a PostgreSQL database. The server uses LVM for storage, with a single volume group vg_data containing two logical volumes: lv_web (50GB) and lv_db (100GB). The root filesystem is on a separate disk. The administrator receives alerts that the database volume is at 95% capacity. The server has additional unused space from a recently added disk that was added to the volume group as an additional physical volume, but the space has not been allocated. The administrator runs 'vgs' which shows VG vg_data with total size 500GB, allocated 150GB, and free 350GB. The administrator wants to increase the size of lv_db by 50GB. Which course of action should the administrator take?

Accepted Answer

Run 'lvextend -L +50G /dev/vg_data/lv_db' and then 'resize2fs /dev/vg_data/lv_db' (if filesystem is ext4).. The administrator needs to extend the existing logical volume lv_db by 50GB using 'lvextend -L +50G /dev/vg_data/lv_db' (the '+' is critical for relative growth), and then if the filesystem is ext4, 'resize2fs /dev/vg_data/lv_db' resizes the filesystem to use the newly allocated space. The volume group already has 350GB free, so no new physical volume needs to be added.

Answer

Run 'lvresize -L 50G /dev/vg_data/lv_db' and then 'xfs_growfs /mount/point'.

Answer

Run 'lvcreate -L 50G -n lv_backup vg_data' and mount it.

Answer

Run 'vgextend vg_data /dev/sdb1' and then 'lvextend -L 50G /dev/vg_data/lv_db'.

Question 18

Which command displays information about currently loaded kernel modules?

Accepted Answer

lsmod. The `lsmod` command reads the `/proc/modules` file to display a list of all currently loaded kernel modules, showing their name, size, usage count, and dependent modules. This is the standard tool for querying the current module state in the Linux kernel.

Answer

insmod

Answer

modinfo

Answer

modprobe -l

Question 19

A developer downloads the source code for a kernel module and attempts to compile it using `make`. The compilation fails with an error indicating that the kernel header files are missing. Which package should be installed to provide the necessary headers on a Debian system?

Accepted Answer

`linux-headers-$(uname -r)`. The correct package is `linux-headers-$(uname -r)` because kernel modules must be compiled against headers that match the exact running kernel version. The `$(uname -r)` command substitution dynamically inserts the current kernel release string (e.g., `5.10.0-28-amd64`), ensuring the headers correspond to the active kernel. On Debian, these headers are provided by the `linux-headers-` package, which includes the necessary `Kbuild`, `Kconfig`, and header files under `/usr/src/linux-headers-`.

Answer

`kernel-headers-generic`

Answer

`build-essential`

Answer

`linux-kernel-headers`

Question 20

A system administrator needs to see the boot messages recorded by systemd-journald from the current boot. Which command is most appropriate?

Accepted Answer

journalctl -b. The `journalctl -b` command is the most appropriate because it specifically queries the systemd journal for messages from the current boot. Systemd-journald is the default logging daemon on modern Linux distributions, and `journalctl -b` filters the binary journal to show only entries with a boot ID matching the current boot, which includes kernel messages, service logs, and boot-time events.

Answer

dmesg

Answer

tail -n 50 /var/log/syslog

Answer

cat /var/log/messages