How can the existing environment variable FOOBAR be suppressed for the execution of the script./myscript only?

• A.env -i FOOBAR./myscript
• B.env -u FOOBAR./myscript
• C.set -a FOOBAR="";./myscript
• D.unset -v FOOBAR;./myscript

Comment: *

Name: *

Email: *

Verification: *

FILL BLANK
Which command must be run after adding a new email alias to the configuration in order to make this change effective? (Specify the command without any path but including all required parameters.)

Comment: *

Name: *

Email: *

Verification: *

Which of the following keywords can be used in the file /etc/resolv.conf? (Choose TWO correct answers.)

• A.lookup
• B.substitute
• C.method
• D.search
• E.nameserver

Comment: *

Name: *

Email: *

Verification: *

Which of the following commands can identify the PID od a process which opened a TCP port?

• A.nessus
• B.lsof
• C.strace
• D.ptrace
• E.debug

Comment: *

Name: *

Email: *

Verification: *

What is true about the file /etc/localtime?

• A.After changing this file, newtzconfig has to be run to make the changes effective.
• B.It is either a symlink to or a copy of a timezone information file such as /usr/share/zoneinfo/ .
  Europe/Berlin
• C.It is a symlink to /sys/device/clock/ltime and always contains the current local time.
• D.It is created and maintained by the NTP service based on the location of the system's IP address.
• E.It is a plain text file containing a string such as Europe/Berlin

Comment: *

Name: *

Email: *

Verification: *