Question 1

Each entry in a crontab must end with what character?

Options :

A : Tab

B : Space

C : Backslash

D : Newline

Answer: D

Question 2

Which of the following commands will send output from the program myapp to both

standard output (stdout) and the file file1.log?

Options :

A : cat < myapp | cat> file1.log

B : myapp 0>&1 | cat > file1.log

C : myapp | cat > file1.log

D : myapp | teefile1.log

E : tee myapp file1.log

Answer: D

Question 3

Which of the following commands reboots the system when using SysV init? (Choose TWO

correct answers.)

Options :

A : shutdown -r now

B : shutdown -r "rebooting"

C : telinit 6

D : telinit 0

E : shutdown -k now "rebooting"

Answer: A,C

Question 4

What is true regarding TCP port 23?

Options :

A : Port 23 is the well known port for the telnet service which is a plain text protocol that should no longer be used.

B : Port 23 is the well known port for the SSH service which provides secure logins.

C : Port 23 is the well known port for the rlogin service which is SSL secured by default.

D : Port 23 is the well known port for the system login services which are encrypted when the user runs the starttls command in his login shell.

Answer: A

Question 5

What is the correct command to extract the contents of the archive file download.bz2?

Free LFCS Mock Exam – Practice Online Confidently