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QUESTION 61
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 disk writes 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.
Answer: B
QUESTION 62
What does the command do: mount -a?
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 current user.
D.   It mounts all filesystems listed in /etc/fstab which have the option auto set.
E.   It mounts all filesystems listed in /etc/fstab which have the option noauto set.
Answer: D
QUESTION 63
Which of the following commands set the sticky bit for the directory /tmp? (Choose TWO.)
A.   chmod +s /tmp
B.   chmod +t /tmp
C.   chmod 1775 /tmp
D.   chmod 4775 /tmp
E.   chmod 2775 /tmp
Answer: BC
QUESTION 64
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
Answer: B
QUESTION 65
Which of the following commands shows the definition of a given shell command?
A.   where
B.   stat
C.   type
D.   case
Answer: C
QUESTION 66
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 will be executed with the effective rights of the group instead of the owner.
C.   The execute flag is not set for the owner. Therefore the SetUID flag is ignored.
D.   The command will be executed with the effective rights of the owner and group.
Answer: C
QUESTION 67
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.   Permissions
Answer: C
QUESTION 68
Which file in the /proc filesystem lists parameters passed from the bootloader to the kernel? (Specify the file name only without any path.)
Answer:
cmdline, /proc/cmdline
QUESTION 69
Which command will display messages from the kernel that were output during the normal boot sequence?
Answer:
dmesg, /bin/dmesg
QUESTION 70
Which world-writable directory should be placed on a separate partition in order to prevent users from being able to fill up the / filesystem? (Specify the full path to the directory.)
Answer:
/tmp, tmp, /var/tmp, /tmp/, /var/tmp/
QUESTION 71
In which directory must definition files be placed to add additional repositories to yum?
Answer:
/etc/yum.repos.d, /etc/yum.repos.d/, yum.repos.d, yum.repos.d/
QUESTION 72
What is the name of the main configuration file for GNU GRUB? (Specify the file name only without any path.)
Answer:
menu.lst, grub.conf, grub.cfg
QUESTION 73
Which option to the yum command will update the entire system? (Specify ONLY the option name without any additional parameters.)
Answer:
update, upgrade
QUESTION 74
Which command will disable swapping on a device? (Specify ONLY the command without any path or parameters.)
Answer:
swapoff, /sbin/swapoff
QUESTION 75
Which Debian package management tool asks the configuration questions for a specific already installed package just as if the package were being installed for the first time? (Specify ONLY the command without any path or parameters.)
Answer:
dpkg-reconfigure
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