Which of the following shell redirections will write standard output and standard error output to a file named filename?

1. A. 2>&1 >filename
2. B. >filename 2>&1
3. C. 1>&2>filename
4. D. >>filename
5. E. 1&2>filename

Correct Answer: B

CORRECT TEXT
Which command is used to sync the hardware clock to the system clock? (Specify ONLY the command without any path or parameters.)

1. A.

Correct Answer: hwclock/sbin/hwclock/usr/sbin/hwclock

What is the purpose of the iconv command?

1. A. It converts bitmap images from one format to another such as PNG to JPEG.
2. B. It verifies that the root directory tree complies to all conventions from the Filesystem Hierarchy Standard (FHS).
3. C. It displays additional meta information from icon files ending in .ico.
4. D. It changes the mode of an inode in the ext4 file system.
5. E. It converts files from one character encoding to another.

Correct Answer: E

Which of the following commands will reduce all consecutive spaces down to a single space?

1. A. tr '\s' ' ' < a.txt > b.txt
2. B. tr -c ' ' < a.txt > b.txt
3. C. tr -d ' ' < a.txt > b.txt
4. D. tr -r ' ' '\n' < a.txt >b.txt
5. E. tr -s ' ' < a.txt > b.txt

Correct Answer: E

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