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Question 1

Which configuration file would be edited to change default options for the OpenSSHserver?

Options :

A : /etc/ssh/sshd_config

B : /etc/ssh/ssh

C : /etc/ssh/server

D : /etc/ssh/ssh_config

E : /etc/ssh/ssh_server

Answer: A

Question 2

Each entry in a crontab must end with what character?

Options :

A : Tab

B : Space

C : Backslash

D : Newline

Answer: D

Question 3

How can the normal output of a command be written to a file while discarding the error output?

Options :

A : command >2>file 1&>/dev/null

B : command < output > /dev/null

C : command > discard-error > file

D : command > /dev/null 2&>1 output

E : command >file 2>/dev/null

Answer: A

Question 4

Which of the following commands will send output from the program myapp to bothstandard 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 5

When running the commandsed -e "s/a/b/" /tmp/file >/tmp/fileWhile /tmp/file contains data, why is /tmp/file empty afterwards?

Options :

A : The file order is incorrect. The destination file must be mentioned before the command to ensure redirection.

B : The command sed did not match anything in that file therefore the output is empty.

C : When the shell establishes the redirection it overwrites the target file before the redirected command starts and opens it for reading.

D : Redirection for shell commands do not work using the > character. It only works using the | character instead.

Answer: C