Linux rookie 2 device partitioning and Disk Management

Unit four device partitioning and Disk Management

Partitioning method

FDISK/DEV/VDB Division Command/dev/vdb

Welcome to Fdisk (Util-linux 2.23.2).

Changes'll remain in memory only, until the decide to write them.

Be careful before using the Write command.

Command (M for assist): M get help

Command Action

A toggle a bootable flag

b Edit BSD Disklabel set device label

C Toggle the DOS compatibility flag

d Delete a partition remove device

G Create a new empty GPT partition table

G Create an IRIX (SGI) partition table

L list known partition types list device types

M Print this menu

n Add a new partition newly created partition

o Create a new empty DOS partition table

P Print the partition table show partitioned tables

Q Quit without saving changes exit partition tool

s create a new empty Sun Disklabel

t change a partition ' s system ID changes the partition function label

U Change display/entry units

V Verify the partition table

W Write table to disk and exit save changed partition table

X Extra functionality (experts only)

Partition type:p Specifies the partition type that divides the device

P Primary (0 primary, 0 extended, 4 free)

E Extended

Partition number (1-4, default 1): 1 specifies the partition table numbers to use

First sector (2048-20971519, default 2048): Enter partition start fast, select default

Using Default Value 2048

Last sector, +sectors or +size{k,m,g} (2048-20971519, default 20971519): +1G Device size designation

Command (M for help): P Display partition table

/DEV/VDB1 2048 2099199 1048576 The partition that was partitioned by Linux

Command (M for help): Wq save change mode and exit

Partprobe Synchronization Partition Table

Cat/proc/partitions to see which partitions the system recognizes

Using the newly created partition

Format (format the file system in the partition device)

Mount

Vim/etc/fstab Permanent Mount

Device Removal

Unloading

To delete an auto-mount entry for a device in/etc/fstab

Delete a partition with Fdisk

management of swap partitions

Swapon-s viewing swap partitions in the system

Creating a Swap partition

MKSWAP/DEV/VDB1 format the/DEV/VDB1 into swap format

Swapon-a/DEV/VDB1 Activation

Vim/etc/fstab Boot automatic activation

/DEV/VDB1 Swap defautls 0 0

Delete a swap auto-activation entry in/etc/fstab

SWAPOFF/DEV/VDB1 to close the active swap partition

Disk Encryption

1. Disk Encryption

FDISK/DEV/VDB partition

Cryptsetup LUKSFORMAT/DEV/VDB1 Encryption

Cryptsetup open/dev/vdb1 Westos Open

Mkfs.xfs/dev/mapper/westos formatting

mount/dev/mapper/westos/mnt/Mount

umount/mnt/Uninstall

Cryptsetup Close Westos exit

2. Permanent Mount of encrypted disks

Vim/etc/cryppttabb decryption after Device management file device encryption character storage file

Redhat/dev/vdb1/root/lukspsfile

Vim/root/lukspsfile Zhonghaoxuan

chmod 600/root/lukspsfile

Cryptsetup Luksaddkey/dev/vdb1/root/lukspsfile to associate a password record file with a device

Vim/etc/fstab

/DEV/MAPPER/REDHAT/MNTXFSDEFAULTS0 0 Automatic Mount encryption device

Reboot

3. Encryption Erase

Vim/etc/fstab

>/etc/crypttab

Rem-fr/root/lukspsfile

umount/mnt/

Cryptsetup Close Redhat

Mkfs.xfs/dev/vdb1

Df

Disk Array

fdisk/dev/vdb# #划分三个分区

Mdadm-c/dev/md0-a yes-l 1-n 2-x 1/dev/vdb{1..3}

Create a block of unused disk blocks that are used by the new level if not

mkfs.xfs/dev/md0 formatting

mount/dev/md0/mnt/Mount

Watch-n 1 Cat/proc/mdstat Monitoring command

Mdadm-f/DEV/MD0/DEV/VDB1 Stop

mdadm-d/dev/md0 View Status

Mdadm-r/DEV/MD0/DEV/VDB1 Delete

Mdadm-a/DEV/MD0/DEV/VDB1 New

umount/mnt/Uninstall

Mdadm-s/dev/md0 stop using (unload and execute-s when only one partition is saved)

Quotas

Fdisk/dev/vdb New VDB1

Mkfs.xfs/dev/vdb1

Mkdir/pub New Directory

chmod 1777/pub Set/pub permissions

Mount-o Usrquota/dev/vdb1/pub Mount

Quotaon-uv/dev/vdb1

Edquota-u Student Settings

DD If=/dev/zero of=/pub/file bs=1m count=500 divided out

Quota View

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Linux rookie 2 device partitioning and Disk Management