NOS - 120 LESSON 5
du directory usage command
A command that displays directory usage.
fuser command
A command used to identify any users or processes using a particular file or directory.
tune2fs command
A command used to modify ext2 and ext3 filesystem parameters.
cfdisk command
A command used to partition hard disks; it displays a graphical interface in which the user can select partitioning options.
has no data section displays a major and minor number in place of a file size
A device file _______________________. (Choose all that apply.)
e2label
Changes label on ext partition
/, /proc, and swap the one at the end
Given the following output from /etc/fstab, which filesystems will be automatically checked on boot by the fsck command?
lsusb
List USB devices
partprobe
Request that the operating system re-read the partition table. The operating system kernel reads the partition table and recognizes the table changes.
pvscan
Scans all disks for physical volumes and displays the result.
bad blocks
The areas of a storage medium unable to store data properly.
swapon
To activate a swap space that has been initialized, you can execute:
quotaon
Turns quota on
Universally Unique identified
UUID
quotaoff
Used to deactivate quotas.
lvdisplay
Used to view LVM logical volumes.
mkswap
set up a Linux swap area
repquota
summarizes file system quotas
umount command
unmount disk
/proc/devices
A file that contains currently used device information.
/etc/mtab
A file that stores a list of currently mounted filesystems.
False
After a partition on a hard disk is formatted with a filesystem, all partitions on that hard disk drive must use the same filesystem. True or False?
pvcreate
Command to initialize a physical volume for logical volume use
lvscan
Command to scan all disks for logical volumes
mkisofs
Create an hybrid ISO9660/JOLIET/HFS filesystem
lvcreate
Creates a new logical volume in a volume group
mount point
Drive that functions like a folder mounted into another drive.
edquota
Edit a quota
resize2fs
Extends a logical volume group filesystem
fsck
File system consistency check and repair
Create one or more partitions on each of the SSDs. Mount any partitions created on the two SSDs such that they are accessible by the operating system. Format any partitions created on the SSDs with a valid filesystem recognized by Linux.
Jim has just installed two new SAS SSDs in his system. He properly installs the hardware in his machine. Before he can use them for data storage and retrieval, what must he do? (Choose all that apply.)
umount /media/cdromeject /media/cdrom
John has been using the cdrom on his computer that is running the Linux operating system. He pushes the eject button on the front of the drive, but it doesn't eject the disk. Which of the following commands should he run? (Choose all that apply.)
lsblk
List block devices
displays the number of used and available inodes for an ext2/ext3/ext4 filesystem
What does the command dumpe2fs -h do?
mount -a
Which command mounts all existing filesystems in /etc/fstab?
/etc/fstab
Which file should be configured so that quotas are enabled at boot time?
A filesystem UUID A device path such as /dev/sdb2 A filesystem label
Which of the following can be used to mount a filesystem? (Choose all that apply.)
quotacheck
Which of the following commands can be used to scan a filesystem for disk usage, create, check, and repair quota files?
gdisk
Which of the following commands can only be used to create partitions on a GPT hard disk?
mkfs exfat /dev/sdb1
Which of the following commands cannot be used to create an exFAT filesystem on a USB thumb drive that is recognized as /dev/sdb?
/boot
Which of the following is required as a separate partition in order to use LVM?
Quotas can limit both user space and the number of files a user can own. Hard limits can never be exceeded. Soft limits allow a user to exceed them for a certain period of time.
Which of the following statements are true? (Choose all that apply.)
VGs are comprised of one or more PVs
Which of the following statements regarding LVM structure is correct?
/dev/sdc1
You plug a USB flash memory drive into a system that has two SATA hard disks. How will the partition on this USB flash memory drive be identified by Linux?
df -T cat /etc/mtab
You want to see the filesystems that are in use on the system. What command could you use? (Choose all that apply.)
lvextend
command is used to increase the size of an LV, e.g. to use space extended onto an existing VG
swapoff
deactivates swap partition
mkfs
make file system command
qouta command
make qoutas
mount command
mount device
pseudo filesystem
no actual files but only virtual entries
xfs_admin
parameter modification
-i 14d
Callie wants to make sure that a filesystem is checked every 20 days. Which of the following options, when used with the tune2fs command, would set a full filesystem check to run every 14 days?
displays the total size of the /var directory
What does the du -s /var command do?
Unmount the filesystem.
What must you do to successfully run the fsck command on a filesystem?
device file
A file used by Linux commands that represents a specific device on the system; these files do not have a data section and use major and minor numbers to reference the proper driver and specific device on the system, respectively.
Unmount the device from the directory.
A user mounts a device to a mount point directory and realizes afterward she needs files previously found within the mount point directory. What should this user do?
Mount the filesystem and check the lost+found directory underneath the mount point.
A user runs the fsck command with the -f option on an ext4 filesystem that is showing signs of corruption. How would that user locate any files the system was unable to repair?
disk quotas
An option on NTFS volumes that enables administrators to limit how much disk space a user can occupy with his or her files.
pvdisplay
display attributes of a physical volume
False
Character devices typically transfer data more quickly than block devices. True or False?
mknod
Make block or character special files
filesystem corruption
The errors in a filesystem structure that prevent the retrieval of stored data.
root filesystem
The filesystem that contains most files that make up the operating system; it should have enough free space to prevent errors and slow performance.
True
The lvextend command can be used to add unused space within a volume group to an existing logical volume. True or False?
gdisk
Which of the following commands will prompt to convert an MBR partition to GPT, thus destroying all existing MBR partitions on a disk?
xfs_repair /dev/sdb1
Which command can be used to repair an XFS filesystem?
df
Which command is used to display the amount of free space that exists on a filesystem?
e2mkfs -t ext4 device
Which command is used to format a partition on a hard disk drive with the ext4 filesystem?
du
Which of the following commands when run from the /, or root, directory will return a very long list of many pages of results?
/dev/sdb3
Which of the following would be the device file for the third partition on the second SATA drive on a Linux system?
Journaling File System
is one that keeps track of the information written to the hard drive in a journal.
parted command
manage hard disk partitions
vg...
volume group management