Chapter 5 - Linux Filesystem Administration Flashcards by Joshua Tharrington

The directory off the root where device files are typically stored.

/dev directory

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A file used to specify which filesystems to mount automatically at boot time and queried by the mount command if an insufficient number of arguments are specified.

/etc/fstab

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A file that stores a list of currently mounted filesystems.

/etc/mtab

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A file that contains currently used device information.

/proc/devices

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The areas of a storage medium unable to store data properly.

bad blocks

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Used to list UUIDs for filesystems and GPT partitions.

blkid command

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The unit of data commonly used by filesystem commands; a _____ can contain several sectors.

block

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Storage devices that transfer data to and from the system in chunks of many data bits by caching the information in RAM; they are represented by ________ files.

block devices

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Used to partition hard disks; displays a graphical interface in which the user can select partitioning options.

cfdisk command

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The storage devices that transfer data to and from the system one data bit at a time; they are represented by _____________ files.

character devices

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A series of tracks on a hard disk that are written to simultaneously by the magnetic heads in a hard disk drive.

cylinder

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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.

device file

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Used to display disk free space by filesystem

df (disk free space) command

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The limits on the number of files, or total storage space on a filesystem, available to a user.

disk quotas

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Used to display directory usage.

du (directory usage) command

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Used to set a description label on an ext2/ext3/ext4 filesystem.

e2label command

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Used to specify quota limits for users and groups.

edquota command

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Used to unmount and eject CD/DVD removable media.

eject command

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Used to set a description label on an exFAT filesystem.

exfatlabel command

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Used to set a description label on a FAT filesystem.

fatlabel command

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Used to create and modify MBR and GPT partitions.

fdisk command

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The errors in a filesystem structure that prevent the retrieval of stored data.

filesystem corruption

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The process in which a filesystem is placed on a disk device.

formatting

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Used to check the integrity of a filesystem and repair damaged files.

fsck (filesystem check) command

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Used to identify any users or processes using a particular file or directory

fuser command

Used to create and modify GPT partitions. It uses an interface that is very similar to fdisk.

gdisk (GPT fdisk) command

A disk quota that the user cannot exceed.

hard limit

Used to display storage device information including type, size, major number, minor number, and mount point.

lsblk command

Used to display USB devices that are attached to the system, such as a USB flash memory drive.

lsusb command

Used to create LVM logical volumes.

lvcreate command

Used to view LVM logical volumes.

lvdisplay command

Used to add space from VGs to existing LVM logical volumes.

lvextend command

Used to view LVM logical volumes.

lvscan command

Used to format (create) filesystems.

mkfs (make filesystem) command

Used to create an ISO image from one or more files on the filesystem.

mkisofs command

Used to re-create a device file, provided the major number, minor number, and type (character or block) are known.

mknod command

Used to prepare newly created swap partitions for use by the Linux system.

mkswap command

Used to mount filesystems on devices to mount point directories.

mount command

The directory in a file structure to which something is mounted.

mount point

A process used to associate a device with a directory in the logical directory tree such that users can store data on that device.

mounting

Used to create and modify MBR and GPT partitions.

parted (GNU Parted) command

Used to request that partition tables be reloaded by the Linux kernel.

partprobe command

The block size used by the LVM when storing data on a volume group.

physical extent (PE) size

A partition that is used by the LVM.

Physical Volumes (PVs)

Used to create LVM physical volumes.

pvcreate command

Used to view LVM physical volumes.

pvdisplay command

Used to view LVM physical volumes

pvscan command

Used to view disk quotas imposed on a user.

quota command

Used to deactivate disk quotas.

quotaoff command

Used to activate disk quotas.

quotaon command

The limits that can be imposed on users and groups for filesystem usage.

quotas

Used to produce a report on quotas for a particular filesystem.

repquota command

Used to change the size of an ext2/ext3/ext4 filesystem after creation; it is normally used after an LV has been extended to include additional space.

resize2fs command

The filesystem containing most files that make up the operating system; it should have enough free space to prevent errors and slow performance.

root filesystem

The smallest unit of data storage on a hard disk; _____ are arranged into concentric circles called tracks and can be grouped into blocks for use by the system

sector

A disk quota that the user can exceed for a certain period of time.

soft limit

Used to disable a partition for use as virtual memory on the Linux system.

swapoff command

Used to enable a partition for use as virtual memory on the Linux system.

swapon command

The process of writing data stored in RAM to a filesystem.

syncing

The area on a hard disk that forms a concentric circle of sectors.

track

Used to modify ext2/ext3/ext4 filesystem parameters.

tune2fs command

A system process used to manage device files for block and character devices.

udev daemon

Used to break the association between a device and a directory in the logical directory tree.

umount command

A unique identifier given to a filesystem or GPT partition when it is created; it can be used to identify that filesystem or GPT partition afterwards.

Universally Unique Identifier (UUID)

Used to create an LVM VG.

vgcreate command

Used to view an LVM VG

vgdisplay command

Used to add physical volumes to an LVM VG

vgextend command

Used to view LVM VGs.

vgscan command

A special filesystem that is used by the Linux kernel for operating system use only; /sys, /dev, /run, and /proc are examples of virtual filesystems.

virtual filesystem

A group of PVs that are used by the LVM

Volume Group (VG)

Used to view and configure parameters for an XFS filesystem, including the description label.

xfs_admin command

Used to view XFS filesystem information and parameters.

xfs_db command

Used to reorganize and optimize an XFS filesystem.

xfs_fsr command

Used to change the size of an XFS filesystem after creation; it is normally used after an LV has been extended to include additional space.

xfs_growfs command

Used to obtain usage information for an XFS filesystem; it can also be used to change the size of an XFS filesystem after creation.

xfs_info command

Used to configure and manage disk quotas for an XFS filesystem.

xfs_quota command

Used to check the integrity of an XFS filesystem and repair damaged files.

xfs_repair command