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Linux Foundation LFCS - Linux Foundation Certified System Administrator

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Total 260 questions

Which of the followingcommand sets the Bash variable named TEST with the content FOO?

A.

set TEST="FOO"

B.

TEST = "FOO"

C.

var TEST="FOO"

D.

TEST="FOO"

What is a purpose of an SSH host key?

A.

It must be sent by any SSH client in addition to a user key in order to identify the client's host.

B.

It provides the server's identity information to connecting SSH clients.

C.

It is the root key by which all user SSH keys must be signed.

D.

It authenticates any user that logs into a remote machine from the key's host.

E.

It is used by system services like cron, syslog or a backup job to automatically connect to remote hosts.

Which command is used to add an empty group to the system? (Specify ONLY the command without any path or parameters.)

Which command can be used to investigate the properties for a particular window in X by clicking that window? (Specify ONLY the command without any path or parameters.)

Which of the following are init systems used within Linux systems? (Choose THREE correct answers.)

A.

startd

B.

systemd

C.

Upstart

D.

SysInit

E.

SysV init

Which of the following commands kills the process with the PID 123 but allows the process to "clean up" before exiting?

A.

kill -PIPE 123

B.

kill -KILL 123

C.

kill -STOP 123

D.

kill -TERM 123

What does the ? symbol within regular expressions represent?

A.

Match the preceding qualifier one or more times.

B.

Match the preceding qualifier zero or more times.

C.

Matchthe preceding qualifier zero or one times.

D.

Match a literal ? character.

Which of the following commands can be used to limit the amount of memory a user may use?

A.

umask

B.

usermod

C.

ulimit

D.

passwd

E.

chage

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 tasks can be accomplished using the command date? (Choose TWO correct answers.)

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.