Linux command exercise: Mount Fdisk swap dd to create a local loopback device

Practice a

1, create a 1G partition, the file system is EXT4, the volume is labeled MyData, the block size is 1024, the reserved management space for the disk

3% of the partition requires that the brake be mounted to the/data directory, and automatically mounted devices are referenced using the volume label.

FDISK/DEV/SDA  

[Email protected] ~]# FDISK/DEV/SDA

Warning:dos-compatible mode is deprecated. It ' s strongly recommended to

Switch off the mode (command ' C ') and change display units to

Sectors (Command ' u ').

Command (M for help): n New Partition, if it is a new hard disk will prompt to create a new primary partition (P) or an extended partition (e)

First cylinder (2258-2611, default 2258): Enter the starting cylinder defaults

Using Default Value 2258

Last cylinder, +cylinders or +size{k,m,g} (2258-2611, default 2611): +1g Create a 1G partition

Command (M for help): t T modify partition type

Partition number (1-8): 8

Hex code (Type L to list codes): l l View System-supported partition types

0 Empty NEC DOS bayi minix/old Lin BF Solaris

1 FAT12 Plan 9 swap/so C1 drdos/sec (fat-

2 Xenix root 3c partitionmagic Linux C4 drdos/sec (fat-

3 Xenix usr Venix 80286 os/2 hidden c:c6 drdos/sec (fat-

4 FAT16 <32m PPC PReP Boot-up Linux extended C7 Syrinx

5 Extended SFS, NTFS volume set da non-fs data

Hex code (type L to list codes): 83 input partition type

Command (M for help): p shows the partitioned table that has been established

disk/dev/sda:21.5 GB, 21474836480 bytes

255 heads, Sectors/track, 2610 cylinders

Units = Cylinders of 16065 * 8225280 bytes

Sector size (logical/physical): bytes/512 bytes

I/O size (minimum/optimal): bytes/512 bytes

Disk Identifier:0x0001e9b8

Device Boot Start End Blocks Id System

/DEV/SDA1 * 1 204800 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 1046 8192000 Linux

/dev/sda3 1046 1556 4096000-up Linux

/DEV/SDA4 1556 2611 8477696 5 Extended

/dev/sda5 1556 1811 2048000-up Linux

/dev/sda6 1811 2066 2048000-up Linux

/dev/sda7 2066 2258 1536000, Linux Swap/solaris

/dev/sda8 2258 2389 1059691 -up Linux

SDA8 is just the newly created partition

Ommand (M for help): W Save exit new partition established successfully

The partition table has been altered!

Calling IOCTL () to re-read partition table.

[[email protected] ~]# partprobe partprobe notify kernel Reread partition table, let kernel recognize new partition

[Email protected] ~]# cat/proc/partitions

Major Minor #blocks name

8 0 20971520 SDA

8 1 204800 sda1

8 2 8192000 Sda2

8 3 4096000 Sda3

8 4 1 SDA4

8 5 2048000 Sda5

8 6 2048000 Sda6

8 7 1536000 Sda7

8 8 1024000 The SDA8 kernel has identified the new partition, only the partition can be formatted, mounted, and so on.

[[email protected] ~]# mke2fs-t ext4/dev/sda8 format/dev/sda8 partition as EXT4 type

[[email protected] test]#  mke2fs-l mydata  /dev/sda8     Set a new volume labeled MYDATA

[[email protected] test]# mke2fs-m 3/dev/sda8 reserved Partition 3% to the admin space

[email protected] test]# mke2fs-b 1024/DEV/SDA8 Set block size to 1024 bytes

The new partition is then written to the/etc/fstab document, which automatically mounts the boot, adding a line at the bottom of the document as follows:

label= ' MYDATA ' /data ext4 defaults 0 0

Implement volume label Auto Mount as MyData

Exercise Two

2, create a local loopback file/var/swaptemp/swapfile for swap, 512MB size required,

the volume label is swap-file and the switching device is automatically enabled on boot:

Mkdir/var/swaptemp

DD If=/dev/zero of=/var/swaptemp/swapfile bs=512m count=1

Mkswap Label=swap-file/var/swaptemp/swapfile

Vim/etc/fstab

/var/swaptemp/swapfile swap swap defaults 0 0 write/etc/fstab for automatic mount on boot

This article is from the "Learn Linux history" blog, please be sure to keep this source http://woyaoxuelinux.blog.51cto.com/5663865/1868152

Linux command exercise: Mount Fdisk swap dd to create a local loopback device