LFCS Linux Foundation Certified System Administrator Questions and Answers

What of the following statements are true regarding /dev/ when using udev? (Choose TWO correct answers.)

To prevent a specific user from scheduling tasks with at, what should the administrator do?

What is the output of the following command sequence?

for token in a b c; do

echo -n "$token ";

done

Which of the following characters can be combined with a separator string in order to read from the current input source until the separator string, which is on a separate line and withoutany trailing spaces, is reached?

Which of the following statements is correct when talking about /proc/?

In which file, if present, must all users be listed that are allowed to use the cron scheduling system? (Specify the full name of the file, including path.)

Which of the following commands lists all currently installedpackages when using RPM package management?

Which of the following commands can be used to extract content from a tar file?

Which of the following files, when existing, affect the behavior of the Bash shell? (Choose TWO correct answers.)

What is the name of the simple graphical login manager that comes with a vanilla X11 installation? (Specify ONLY the command without any path or parameters.)

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

In compliance with the FHS, in which of the directories are man pages found?

After moving data to a new filesystem, how can the former path of the data be kept intact in order to avoid reconfiguration of existing applications? (Choose TWO correct answers.)

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

What entry can be added to the syslog.conf file to have all syslog messages generated by a system displayed on console 12?

When given the following command line.

echo "foo bar" | tee bar | cat

Which of the following output is created?

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.)

Which of the following commands is used to update the list of available packages when using dpkg based package management?

Which type of filesystem is created by mkfs when it is executed with the block device name only and without any additional parameters?

What do the permissions -rwSr-xr-x mean for a binary file when it is executed as a command?

Which of the following environment variables overrides or extends the list of directories holding shared libraries?

Which command displays a list of allbackground tasks running in the current shell? (Specify ONLY the command without any path or parameters.)

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?

What output will the following command sequence produce?

echo '1 2 3 4 5 6' | while read a b c; do

echo result: $c $b $a;

done

Which of the following commands can be used to determine how long the system has been running? (Choose TWO correct answers.)

Which directory holds the files that configure the xinetd service when using several configuration files instead of an integrated configuration file? (Specify the full path to the directory.)

Which of the following commands will write a message to the terminals of all logged in users?

When the command echo $$ outputs 12942, what is the meaning of 12942?

Which of the following signals is sent to a process when the key combination CTRL+C is pressed on the keyboard?

With IPv6, how many bits have been used for the interface identifier of an unicast address? (Specify the number using digits only.)

What two character sequence is present at the beginning of an interpreted script? (Please specify the TWO correct characters only)

How many IP-addresses can be used for unique hosts inside the IPv4 subnet 192.168.2.128/28? (Specify the number only without any additional information.)

Which command is used to create and initialize the files used to store quota information? (Specify ONLY the commandwithout any path or parameters.)

Which of the following commands overwrites the bootloader located on /dev/sda without overwriting the partition table or any data following it?

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

Which of the following keywords can be used in the file /etc/nsswitch.conf to specify a source for host name lookups? (Choose TWO correct answers.)