When the command echo $? outputs 1, which of the following statements is true? A. It is the process ID of the echo command. B. It is the process ID of the current shell. C. It is the exit value of th...

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 A. result: 3 4 5 6 2 1 B. result: 1 2 3 4 5 6 C. result: 6 5 4 D. resul...

Which of the following pieces of information of an existing file is changed when a hard link pointing to that file is created? A. File size B. Modify timestamp C. Link count D. Inode number E. ...

What do the permissions -rwSr-xr-x mean for a binary file when it is executed as a command? A. The command is SetUID and it will be executed with the effective rights of the owner. B. The command wil...

Which of the following commands shows the definition of a given shell command? A. where B. stat C. type D. case

Which of the following commands can be used to display the inode number of a given file? A. inode B. ls C. ln D. cp

Which of the following commands set the sticky bit for the directory /tmp? (Choose TWO correct answers.) A. chmod +s /tmp B. chmod +t /tmp C. chmod 1775 /tmp D. chmod 4775 /tmp E. chmod 2775 /tmp

What does the command mount -a do? A. It mounts all available filesystems onto the current directory. B. It shows all mounted filesystems. C. It mounts all user mountable filesystems for the curr...

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?

Instead of supplying an explicit device in /etc/fstab for mounting, what other options may be used to identify the intended partition? (Choose TWO correct answers.) A. FIND B. ID C. LABEL D. NAME E. ...