Question 1

What is true about the file /etc/localtime?
A) It is a plain text file containing a string such as Europe/Berlin.
B) It is created and maintained by the NTP service based on the geolocation of the system's IP address.
C) It is a symlink to /sys/device/clock/ltime and always contains the current local time.
D) It is either a symlink to or a copy of a timezone information file such as / usr /share/zoneinfo/Europe/Berlin.

Accepted Answer

/etc/localtime is typically a symlink or a copy of a timezone file from /usr/share/zoneinfo, which contains the timezone data for the system.

Question 2

What of the following can be done by the command ifconfig? (Choose TWO correct choices.)
A) Set a network interface active or inactive.
B) Specify the kernel module to be used with a network interface.
C) Allow regular users to change the network configuration of a network interface.
D) Change the netmask used on a network interface.
E) Specify which network services are available on a network interface.

Accepted Answer

The `ifconfig` command can be used to activate or deactivate a network interface (A) and to change the netmask of a network interface (D).

Question 3

Which SysV init configuration file should be modified to disable the ctrl-alt-delete key combination?
A) /etc/keys
B) /proc/keys
C) /etc/inittab
D) /proc/inittab
E) /etc/reboot

Accepted Answer

The /etc/inittab file is used in SysV init systems to configure the behavior of the system, including the action taken when the ctrl-alt-delete key combination is pressed.

Question 4

What is true regarding the command sendmail?
A) With any MTA, the sendmail command must be run periodically by the cron daemon.
B) All MTAs, including Postfix and Exim, provide a sendmail command.
C) The sendmail command prints the MTAs queue history of which mails have been sent successfully.
D) It is only available when the sendmail MTA is installed.

Accepted Answer

Most MTAs, including Postfix and Exim, provide a sendmail command for compatibility with scripts and programs that expect to use sendmail for sending emails.

Question 5

Which command will display messages from the kernel that were output during the normal boot sequence?

Accepted Answer

The answer of Which command will display messages from the...

Question 6

Given the following routing table:  How would an outgoing packet to the destination 192.168.2.150 be handled?
A) It would be passed to the default router 192.168.178.1 on wlan0.
B) It would be directly transmitted on the device eth0.
C) It would be passed to the default router 255.255.255.0 on eth0.
D) It would be directly transmitted on the device wlan0.
E) It would be passed to the router 192.168.1.1 on eth0.

Accepted Answer

The answer of Given the following routing table:  How...

Question 7

After modifying GNU GRUB's configuration file, which command must be run for the changes to take effect?
A) kill -HUP $(pidof grub)
B) grub-install
C) grub
D) No action is required

Accepted Answer

The answer of After modifying GNU GRUB's configuration file, which...

Question 8

Which of the following is a valid IPv6 address?
A) 2001:db8:3241::1
B) 2001::db8:4581::1
C) 2001:db8:0g41::1
D) 2001%db8%9990%%1
E) 2001.db8.819f..1

Accepted Answer

IPv6 addresses are written in eight groups of four hexadecimal digits, separated by colons. Option A is a valid IPv6 address format, while the others contain invalid characters or incorrect formatting.

Question 9

Which of the following statements is correct when talking about /proc/?
A) All changes to files in /proc/ are stored in /etc/proc.d/ and restored on reboot.
B) All files within /proc/ are read-only and their contents cannot be changed.
C) All changes to files in /proc/ are immediately recognized by the kernel.
D) All files within /proc/ are only readable by the root user.

Accepted Answer

The /proc/ directory is a virtual filesystem that provides an interface to kernel data structures. Changes to files in /proc/ are immediately recognized by the kernel as it reflects the current state of the system.

Question 10

Which world-writable directory should be placed on a separate partition in order to prevent users from being able to fill up the / filesystem? (Specify the full path to the directory.)

Accepted Answer

The answer of Which world-writable directory should be placed on...

Question 11

Which of the following commands lists the dependencies of a given dpkg package?
A) apt-cache depends-on package
B) apt-cache dependencies package
C) apt-cache depends package
D) apt-cache requires package

Accepted Answer

The correct command to list the dependencies of a given dpkg package is "apt-cache depends package".

Question 12

On a regular users workstation the route command takes a long time before printing out the routing table. Which of the following errors does that indicate?
A) The local routing information may be corrupted and must be re-validated using a routing protocol.
B) One of the routers in the routing table is not available which causes the automatic router failure detection mechanism (ARF-D) to wait for a timeout.
C) There may accidentally be more than one default router in which case a default router election has to be done on the network in order to choose one router as the default.
D) DNS resolution may not be working as route by default tries to resolve names of routers and destinations and may run into a timeout.

Accepted Answer

The delay in the route command is likely due to DNS resolution issues, as the command attempts to resolve names of routers and destinations, which can cause a timeout if DNS is not functioning properly.

Question 13

What is the purpose of the command mailq?
A) It fetches new emails from a remote server using POP3 or IMAP.
B) It is a multi-user mailing list manager.
C) It is a proprietary tool contained only in the qmail MTA.
D) It queries the mail queue of the local MTA.
E) It is a command-line based tool for reading and writing emails.

Accepted Answer

The command mailq is used to query the mail queue of the local Mail Transfer Agent (MTA), showing the list of messages currently in the queue waiting to be delivered.

Question 14

What is the first program that is usually started, at boot time, by the Linux kernel when using SysV init?
A) /lib/init.so
B) /sbin/init
C) /etc/rc.d/rcinit
D) /proc/sys/kernel/init
E) /boot/init

Accepted Answer

The first program started by the Linux kernel when using SysV init is /sbin/init. This program is responsible for initializing the system and starting other processes.

Question 15

Which configuration file would be edited to change the default options for outbound SSH sessions?
A) /etc/ssh/sshd_config
B) /etc/ssh/ssh
C) /etc/ssh/client
D) /etc/ssh/ssh_config
E) /etc/ssh/ssh_client

Accepted Answer

The /etc/ssh/ssh_config file is used to configure default settings for SSH client sessions, including outbound SSH connections.

Question 16

Which of the following tasks can be accomplished using the command date? (Choose TWO correct choices.)
A) Synchronize the hardware and system clocks.
B) Output date and time in different formats.
C) Set the system clock.
D) Set the hardware clock.
E) Update the time via NTP.

Accepted Answer

The date command can be used to output date and time in different formats (option B) and to set the system clock (option C).

Question 17

What is true regarding the command userdel --force --remove bob? (Choose TWO correct choices.)
A) The user bob is removed from the system's user database.
B) The user bob's home directory is removed.
C) The locate database is updated to drop files owned by bob.
D) All files owned by bob are remove from all mounted filesystems.
E) In case bob was the last member of a group, that group is deleted.

Accepted Answer

The answer of What is true regarding the command userdel...

Question 18

Which commands can be used to change a user's account aging information? (Choose THREE correct choices..)
A) usermod
B) passwd
C) chattr
D) chage
E) chsh

Accepted Answer

The answer of Which commands can be used to change...

Question 19

Which file in the /proc filesystem lists parameters passed from the bootloader to the kernel? (Specify the file name only without any path.)

Accepted Answer

The answer of Which file in the /proc filesystem lists...

Question 20

Which of the following kernel parameters instructs the kernel to suppress most boot messages?
A) silent
B) verbose=0
C) nomesg
D) quiet

Accepted Answer

The "quiet" kernel parameter is used to suppress most boot messages, providing a cleaner boot process.

Exam 1: Linux Foundation Certified System Administrator

What is true about the file /etc/localtime?

What of the following can be done by the command ifconfig? (Choose TWO correct choices.)

Which SysV init configuration file should be modified to disable the ctrl-alt-delete key combination?

What is true regarding the command sendmail?

Which command will display messages from the kernel that were output during the normal boot sequence?

Given the following routing table: How would an outgoing packet to the destination 192.168.2.150 be handled?

After modifying GNU GRUB's configuration file, which command must be run for the changes to take effect?

Which of the following is a valid IPv6 address?

Which of the following statements is correct when talking about /proc/?

Which world-writable directory should be placed on a separate partition in order to prevent users from being able to fill up the / filesystem? (Specify the full path to the directory.)

Which of the following commands lists the dependencies of a given dpkg package?

On a regular users workstation the route command takes a long time before printing out the routing table. Which of the following errors does that indicate?

What is the purpose of the command mailq?

What is the first program that is usually started, at boot time, by the Linux kernel when using SysV init?

Which configuration file would be edited to change the default options for outbound SSH sessions?

Which of the following tasks can be accomplished using the command date? (Choose TWO correct choices.)

What is true regarding the command userdel --force --remove bob? (Choose TWO correct choices.)

Which commands can be used to change a user's account aging information? (Choose THREE correct choices..)

Which file in the /proc filesystem lists parameters passed from the bootloader to the kernel? (Specify the file name only without any path.)

Which of the following kernel parameters instructs the kernel to suppress most boot messages?