Linux Chapter 5 and 6

fsck

( filesystem check command) a command used to check the integrity of a filesystem and repair damaged files

gdisk

(GPT fdisk command) a command used to create partitions on a GPT hard disk. It uses an interface that is very similar to fdisk

san

(Storage area network) devices that provide a large amount of storage for the servers within the rack as well as one or more uninterruptable power supply

du

(directory usage command) a command that displays directory usage

df

(disk free space) command that displays disk free space by the filesystem

Mkfs

(make filesystem)the command used to create or format filesystems

Where is the /proc filesystem stored?

5

soft limit

A hard disk quota that the user can exceed for a certain period Of time

After a partition on a hard disk drive is formatted with a filesystem, all partitions on that hard disk drive must use the same filesystem. True or False?

False

Character devices typically transfer data more quickly than block devices? True or False

False

SAS transfers data to SCSI disks via parallel cables? True or false

False

Which of the following RAID levels is NOT fault tolerant?

RAID 0

master boot record

The area of a typical hard disk (<2TB) outside a partition that stores partition information and boot loaders.

super block

The portion of a file system that stores critical information such as the inode table and block size

formatting

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

Fdisk

a command used to create delete and manipulate partitions on a hard disk

/etc/fstab

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

data block

a filesystem allocation unit in which the data that makes up the contents on the file as well the filename are stored

mounting

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

filesystem types

bfs: boot file system, btrfs: B-tree file system, cramfs:compressed ROM filesystem,

You want to see the filesystems that are presently in use on the system. What command could you use?

cat/etc/mtab

vg create

command used to create LVM VG

Dumepe2fs

command used to view the total number of inodes and free inodes for an ext2,ext3 or ext4 filesystem with a -h

pv

create: command used to create LVM physical volumes display & scan : command used to view LVM physical volumes

/etc/mtab

file that stores a list of currently mounted filesystems

journal

filesystem function that keeps track of the info that needs to be written to the hard disk or SSD in a journal: common Linux journaling filesystems include ext3,ext4 and REISER

Which command mounts all existing filesystems in /etc/fstab?

mount -a

/dev directory

off the root where device files are typically stored

track

the area on a hard disk that forms a concentric circle of sectors

inode table

the collection of inodes for all files and directories on a filesystem

mount point

the directory in a file structure to which something is mounted

synching

the process of writing data to the hard disk drive that was stored in RAM