Free Practice Questions for Linux Foundation LFCS Exam

Which grep command will print only the lines that do not end with a / in the file foo?

• grep '/$' foo
  
• grep '/#' foo
  
• grep -v '/$' foo
  
• grep -v '/#' foo
  

Which of the following is observed and corrected by a NTP client?

• The skew in time between the system clock and the hardware clock.
  
• The skew in time between the system clock and the reference clock.
  
• Changes in the time zone of the current computer's location.
  
• Adjustments needed to support Daylight Saving Time.
  

Which command is used to set restrictions on the size of a core file that is created for a user when a program crashes?

• core
  
• edquota
  
• ulimit
  
• quota
  

Which file in the /proc filesystem lists parameters passed from the bootloader to the kernel? (Specify the file name only without any path.)

Which command will disable swapping on a device? (Specify ONLY the command without any path or parameters.)

Which of the following commands can remove a user from a group?

• grouprm
  
• groupmod
  
• passwd
  
• usergroups
  
• usermod
  

Which character starts a comment line in a shell script file?

• ;
  
• *
  
• #
  
• /
  

What is the name of the main configuration file for GNU GRUB? (Specify the file name only without any path.)

Which of the following fields can be found in the /etc/group file? (Choose THREE correct answers.)

• The list of users that belong to the group.
  
• The home directory of the group.
  
• The name of the group.
  
• The description of the group.
  
• The password of the group.
  

Which command will display the last line of the file foo.txt?

• head -n 1 foo.txt
  
• tail foo.txt
  
• last -n 1 foo.txt
  
• tail -n 1 foo.txt