Which of the following commands connects to the remote host example.com which has OpenSSH listening on TCP port 2222? (Choose TWO correct answers.)

1. A. ssh --port 2222 example.com
2. B. ssh -p 2222 example.com
3. C. ssh -o Port=2222 example.com
4. D. ssh -o GatewayPort=2222 example.com
5. E. ssh example.com:2222

Correct Answer: BC

Which of the following commands will output all of the lines with the name Fred in upper or lower case but not the word red from the file data_file?(Choose two)

1. A. grep -v fred data_file
2. B. grep '[f]red' data_file
3. C. egrep fred data_file
4. D. grep '[Ff]red' data_file
5. E. grep -i fred data_file

Correct Answer: DE

Which character in the password field of /etc/passwd is used to indicate that the encrypted password is stored in /etc/shadow?

1. A. *
2. B. -
3. C. s
4. D. x

Correct Answer: D

Which of the following is the device file name for the second partition on the only SCSI drive?

1. A. /dev/hda1
2. B. /dev/sda2
3. C. /dev/sd0a2
4. D. /dev/sd1p2

Correct Answer: B

CORRECT TEXT
With X11 forwarding in ssh, what environment variable is automatically set in the remote host shell that is not set when X11 forwarding is not enabled? (Specify only the environment variable without any additional commands or values.)

1. A.

Correct Answer: DISPLAY$DISPLAY