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What is true about the file /etc/localtime?

A.

It is a plain text file containing a string such as Europe/Berlin.

B.

It is created and maintained by the NTP service based on the geolocation of the system's IP address.

C.

It is a symlink to /sys/device/clock/ltime and always contains the current local time.

D.

It is either a symlink to or a copy of a timezone information file such as /usr/share/zoneinfo/Europe/Berlin.

Which of the following commands can be used to display the local routing table? (Choose TWO correct answers.)

A.

ifconfig

B.

dig

C.

netstat

D.

route

E.

trackroute

What argument to the -type option of find will match files that are symbolic links? (Specify only the argument and no other options or words.)

After running the command umount /mnt, the following error message is displayed:

umount: /mnt: device is busy.

What is a common reason for this message?

A.

The kernel has not finished flushing diskwrites to the mounted device.

B.

A user has a file open in the /mnt directory.

C.

Another file system still contains a symlink to a file inside /mnt.

D.

The files in /mnt have been scanned and added to the locate database.

E.

The kernel thinks that a process is about to open a file in /mnt for reading.

A user accidentally created the subdirectory \dir in his home directory. Which of the following commands will remove that directory?

A.

rmdir '~/\dir'

B.

rmdir "~/\dir"

C.

rmdir ~/'dir'

D.

rmdir ~/\dir

E.

rmdir ~/\\dir

Which of the following command sequences overwrites the file foobar.txt?

A.

echo "QUIDQUIDAGIS" >> foobar.txt

B.

echo "QUIDQUIDAGIS" < foobar.txt

C.

echo "QUIDQUIDAGIS" > foobar.txt

D.

echo "QUIDQUIDAGIS" | foobar.txt

Which of the following kernel parameters instructs the kernel to suppress most boot messages?

A.

silent

B.

verbose=0

C.

nomesg

D.

quiet

When trying to unmount a device it is reported as being busy. Which of the following commands could be used to determine which process is causing this?

A.

debug

B.

lsof

C.

nessus

D.

strace

E.

traceroute

In order to display all currently mounted filesystems, which of the following commands could be used? (Choose TWO correct answers.)

A.

cat /proc/self/mounts

B.

free

C.

mount

D.

lsmounts

E.

cat /proc/filesystems

Where are user specific crontabs stored?

A.

In the database file /etc/crontab.db which is shared by all users.

B.

As individual per-user files within /var/spool/cron.

C.

As individual per-user files in /etc/cron.user.d.

D.

In the .crontab file in the user's home directory.

E.

In the file /var/cron/user-crontab which is shared by all users.