Lpi 101-500 Online Practice Questions and Exam Preparation

Lpi 101-500 Online Questions & Answers

• Question 181:

  When running the command sed -e "s/a/b/" /tmp/file >/tmp/file While /tmp/file contains data, why is /tmp/file empty afterwards?

  A. The file order is incorrect. The destination file must be mentioned before the command to ensure redirection.
  B. The command sed did not match anything in that file therefore the output is empty.
  C. When the shell establishes the redirection it overwrites the target file before the redirected command starts and opens itfor reading.
  D. Redirection for shell commands do not work using the > character. It only works using the | character instead.
  C. When the shell establishes the redirection it overwrites the target file before the redirected command starts and opens itfor reading.

• Question 182:

  CORRECT TEXT Which file from the /proc file system contains a list of all currently mounted devices? (Specify ONLY the command without any path or parameters.)

  mounts

• Question 183:

  FILL IN THE BLANK Which command is used to sync the hardware clock to the system clock? (Specify ONLY the command without any path or parameters.)

  hwclock

• Question 184:

  FILL IN THE BLANK What command is used to add OpenSSH private keys to a running ssh-agent instance? (Specify the command name only without any path.)

  ssh-add

• Question 185:

  Which shell command is used to continue background execution of a suspended command?

  A. and
  B. bg
  C. cont
  D. exec
  E. :and
  B. bg

• Question 186:

  How can a specific user be prevented from scheduling tasks with at?

  A. By adding the specific user to the/etc/at.allow file.
  B. By adding the specific user to the [deny] section in the /etc/atd.conf file.
  C. By adding the specific user to the nojobs group.
  D. By adding the specific user to the /etc/at.deny file.
  E. By executing the atd --deny [user] command.
  D. By adding the specific user to the /etc/at.deny file.

• Question 187:

  CORRECT TEXT Which command shows all shared libraries required by a binary executable or another shared library? (Specify ONLY the command without any path or parameters.)

  ldd

• Question 188:

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

  A. silent
  B. verbose=0
  C. nomesg
  D. quiet
  D. quiet

• Question 189:

  Which of the following commands updates the already installed RPM package rpmname?

  A. rpm --update rpmname
  B. rpm rpmname
  C. rpm rpmname
  D. rpm --force rpmname
  E. rpm rpmname
  B. rpm rpmname

• Question 190:

  Given a log file loga.log with timestamps of the format DD/MM/YYYY:hh:mm:ss, which command filters out all log entries in the time period between 8:00 am and 8:59 am?

  A. grep `:08:[09]+:[09]+' loga.log
  B. grep `:08:[00]+' loga.log
  C. grep loga.log `:08:[0-9]+:[0-9]+'
  D. grep loga.log `:08:[0-9]:[0-9]'
  E. grep `:08:[0-9]+:[0-9]+' loga.log
  E. grep `:08:[0-9]+:[0-9]+' loga.log