LFCS Free Practice Test

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

Correct Answer: E

Which utility would be used to change how often a filesystem check is performed on an ext2 filesystem without losing any data stored on that filesystem?

1. A. mod2fs
2. B. fsck
3. C. tune2fs
4. D. mke2fs
5. E. fixe2fs

Correct Answer: C

What is a purpose of an SSH host key?

1. A. It must be sent by any SSH client in addition to a user key in order to identify the client\'s host.
2. B. It provides the server\'s identity information to connecting SSH clients.
3. C. It is the root key by which all user SSH keys must be signed.
4. D. It authenticates any user that logs into a remote machine from the key\'s host.
5. E. It is used by system services like cron, syslog or a backup job to automatically connect to remote hosts.

Correct Answer: B

Which of the following parameters are used for journalctl to limit the time frame of the output? (Choose TWO correct answers.)

1. A. --from=
2. B. --since=
3. C. --until=
4. D. --upto=
5. E. --date=

Correct Answer: BC

CORRECT TEXT
Which command, depending on its options, can display the open network connections, the routing tables, as well as network interface statistics. (Specify ONLY the command without any path or parameters.)

1. A.

Correct Answer: netstat/bin/netstatss/usr/bin/ss