LPIC-1 Practice Test 2 — 10 Questions

Question 1

After a reboot, a server fails to obtain an IP address on its sole ethernet interface. The administrator checks /etc/netplan/01-netcfg.yaml and finds the configuration looks correct. However, the interface shows no IP. The system uses systemd-networkd. Which command should be run next to apply the configuration and bring up the interface?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

netplan apply. The correct command is 'netplan apply' because the system uses netplan to manage network configuration, which generates backend configuration files for systemd-networkd. After editing the YAML file, 'netplan apply' parses the configuration, applies it to the running system, and triggers systemd-networkd to reconfigure the interface without requiring a full restart of the service.

Answer

ifup eth0

Answer

systemctl restart networking

Answer

systemctl restart systemd-networkd

Question 2

A script uses the command substitution: files=$(ls). Which statement about the resulting value of files is true?

Accepted Answer

The variable files contains the output of ls, with trailing newlines removed.. Command substitution captures the standard output of the enclosed command and removes trailing newline characters. Internal newlines are retained, but the final newline is stripped. This behavior is consistent across shells and is why using the result unquoted can lead to word splitting on spaces, tabs, and newlines.

Answer

The variable files contains the output of ls with newlines replaced by spaces.

Answer

The variable files contains the exit status of the ls command.

Answer

The variable files contains a list of filenames separated by null characters.

Question 3

Refer to the exhibit. An administrator runs 'ntpq -p' and sees the output shown. What is the most likely cause of the '16' stratum and '0.000' delay/offset?

Accepted Answer

The NTP daemon has recently started and has not yet synchronized.. The '16' stratum and '0.000' delay/offset values in the 'ntpq -p' output indicate that the NTP daemon has not yet synchronized with any time source. When ntpd starts, it initially sets the stratum to 16 (unsynchronized) and shows zero values for delay and offset until it completes the synchronization process. This is a normal transient state that resolves once the daemon successfully contacts and synchronizes with an NTP server.

Answer

The NTP service is not running.

Answer

The firewall is blocking UDP port 123.

Answer

The restrict lines are blocking all NTP queries.

Question 4

A database server on a Linux system is configured to listen on TCP port 3306. The administrator wants to restrict access to the database server to only the local network (192.168.1.0/24) using iptables. Which of the following iptables rules achieves this?

Accepted Answer

iptables -A INPUT -p tcp --dport 3306 -s 192.168.1.0/24 -j ACCEPT. It adds an INPUT chain rule that accepts TCP traffic destined for port 3306 only when the source address is within the 192.168.1.0/24 subnet. This effectively restricts incoming database connections to the local network, while all other sources are implicitly dropped by the default INPUT policy or subsequent rules.

Answer

iptables -A INPUT -p tcp --dport 3306 -d 192.168.1.0/24 -j DROP

Answer

iptables -A OUTPUT -p tcp --dport 3306 -d 192.168.1.0/24 -j ACCEPT

Answer

iptables -A OUTPUT -p tcp --sport 3306 -s 192.168.1.0/24 -j ACCEPT

Question 5

An organization's DNS server (BIND) is authoritatively serving the example.com zone. The administrator needs to add a mail exchange record for mail.example.com with priority 10. Which resource record should be added to the zone file?

Accepted Answer

example.com. IN MX 10 mail.example.com.. An MX record specifies the mail exchange server for a domain, and the syntax 'example.com. IN MX 10 mail.example.com.' defines a priority of 10 for the mail server mail.example.com. This record tells other mail servers to deliver email for @example.com to mail.example.com, with lower priority values preferred.

Answer

mail.example.com. IN A 192.168.1.10

Answer

mail.example.com. IN CNAME example.com.

Answer

example.com. IN TXT "v=spf1 mx -all"

Question 6

Refer to the exhibit. A user runs 'python --version' and gets 'Python 3.9.1'. Which command would run Python 2 instead?

Accepted Answer

python2. On many Linux distributions, Python 2 and Python 3 are installed side by side, with the `python` command typically linked to Python 2 (or sometimes Python 3, depending on the distribution). However, in this scenario, `python --version` returns 'Python 3.9.1', indicating that `python` is linked to Python 3. To explicitly run Python 2, you must use the `python2` command, which is the standard binary name for Python 2.x installations.

Answer

python --version2

Answer

python3

Answer

python2 --version

Question 7

A server in a corporate network uses systemd-resolved for DNS. Internal hostnames (e.g., server.example.lan) fail to resolve, but external names (e.g., google.com) work. The /etc/resolv.conf is a symlink to /run/systemd/resolve/stub-resolv.conf. The administrator checks the systemd-resolved configuration and finds that the internal DNS server is listed globally, but the network interface has no specific DNS set. Which command should be used to assign the internal DNS server to the interface and fix resolution?

Accepted Answer

Run 'resolvectl dns eth0 10.0.0.1' to set the DNS server for the interface.. `resolvectl dns eth0 10.0.0.1` assigns the internal DNS server specifically to the network interface (eth0), overriding the global setting for that interface. In systemd-resolved, per-interface DNS settings take precedence over global DNS servers, so this command ensures that internal hostnames are resolved by the internal DNS server while external names continue to work via the global configuration.

Answer

Add the internal hostnames to /etc/hosts.

Answer

Restart systemd-resolved service.

Answer

Edit /etc/resolv.conf and add the internal DNS server.

Question 8

A sysadmin wants to prevent an APT package from being upgraded automatically but still allow it to be upgraded manually if needed. Which configuration method best achieves this?

Accepted Answer

Use 'apt-mark hold '. The `apt-mark hold ` command marks a package as held back, preventing it from being automatically upgraded during `apt upgrade` or `apt dist-upgrade`, while still allowing manual upgrades via `apt install ` or `apt-mark unhold`. This directly meets the requirement of blocking automatic upgrades but permitting manual intervention.

Answer

Set the package version to a non-existent version in /etc/apt/preferences

Answer

Add the package to /etc/apt/preferences with Pin-Priority: 1000

Answer

Remove the package from sources.list

Question 9

Order the steps to create and apply a file system permission using ACLs.

Accepted Answer

Mount the filesystem with the acl option, then use setfacl to apply ACL rules, then use getfacl to verify ACL rules.. ACLs require the filesystem to be mounted with the acl option, then setfacl applies rules, and getfacl verifies them.

Answer

Use setfacl to apply ACL rules, then mount the filesystem with the acl option, then use getfacl to verify ACL rules.

Answer

Use getfacl to verify ACL rules, then use setfacl to apply ACL rules, then mount the filesystem with the acl option.

Answer

Mount the filesystem with the acl option, then use getfacl to verify ACL rules, then use setfacl to apply ACL rules.

Question 10

When troubleshooting a problem with a Debian package installation, an administrator wants to see which version of a package would be installed from the configured repositories. Which command displays the candidate version?

Accepted Answer

apt-cache policy package. The `apt-cache policy package` command displays the package's priority, the installed version (if any), and the candidate version (the version that would be installed by default from the configured repositories). This makes it the correct tool for determining which version will be installed from the repositories.

Answer

dpkg -l package

Answer

apt-show-versions package

Answer

apt-get -s install package