2019-03-29实践课堂笔记

[root@longjie ~]# dd if=/dev/sda of=/dev/sdc bs=512 count=10240

10240+0 records in

10240+0 records out

5242880 bytes (5.2 MB) copied, 0.0157024 s, 334 MB/s

[root@longjie ~]# ls -l /dev/sdc

-rw-r--r-- 1 root dengli 5242880 Mar 29 17:01 /dev/sdc

[root@longjie ~]# file /dev/sdc

/dev/sdc: x86 boot sector; partition 1: ID=0x83, active, starthead 32, startsector 204 4096000 sectors; partition 2: ID=0x8e, starthead 23, startsector 4098048, 37844992 seors, code offset 0x63

[root@longjie ~]# cat /proc/partitions

major minor #blocks name

8 0 20971520 sda

8 1 2048000 sda1

8 2 18922496 sda2

8 16 1048576 sdb

8 17 102400 sdb1

8 18 102400 sdb2

11 0 4365312 sr0

253 0 16871424 dm-0

253 1 2048000 dm-1

[root@longjie ~]# partprobe /dev/sdb

[root@longjie ~]# fdisk /dev/sdb

Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.

Be careful before using the write command.

Command (m for help): p

Disk /dev/sdb: 1073 MB, 1073741824 bytes, 2097152 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk label type: dos

Disk identifier: 0x20171c36

Device Boot Start End Blocks Id System

/dev/sdb1 2048 206847 102400 83 Linux

/dev/sdb2 206848 411647 102400 83 Linux

Command (m for help): w

。。。。。。。

[root@longjie ~]# parted /dev/sdb

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

(parted) mkpart primary 481 580

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? I

(parted) P

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

1 481MB 580MB 98.6MB primary

(parted) mkpart primary 481 580 l

Warning: You requested a partition from 481MB to 580MB (sectors 939453..1132812).

The closest location we can manage is 481MB to 481MB (sectors 940031..940031).

Is this still acceptable to you?

parted: invalid token: l

Yes/No? Y

Warning: The resulting partition is not properly aligned for best performance.

Ignore/Cancel? I

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? i

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

2 481MB 481MB 512B primary

1 481MB 580MB 98.6MB primary

(parted) mkpart logic 581 600

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? i

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

2 481MB 481MB 512B primary

1 481MB 580MB 98.6MB primary

3 581MB 600MB 18.9MB logic

(parted) help

(parted) w

align-check TYPE N check partition N for TYPE(min|opt)

alignment

help [COMMAND] print general help, or help on COMMAND

mklabel,mktable LABEL-TYPE create a new disklabel (partition table)

mkpart PART-TYPE [FS-TYPE] START END make a partition

name NUMBER NAME name partition NUMBER as NAME

print [devices|free|list,all|NUMBER] display the partition table, available

devices, free space, all found partitions, or a particular partition

quit exit program

rescue START END rescue a lost partition near START and END

resizepart NUMBER END resize partition NUMBER

rm NUMBER delete partition NUMBER

select DEVICE choose the device to edit

disk_set FLAG STATE change the FLAG on selected device

disk_toggle [FLAG] toggle the state of FLAG on selected device

set NUMBER FLAG STATE change the FLAG on partition NUMBER

toggle [NUMBER [FLAG]] toggle the state of FLAG on partition NUMBE

unit UNIT set the default unit to UNIT

version display the version number and copyright

information of GNU Parted

(parted) w

align-check TYPE N check partition N for TYPE(min|opt)

alignment

help [COMMAND] print general help, or help on COMMAND

mklabel,mktable LABEL-TYPE create a new disklabel (partition table)

mkpart PART-TYPE [FS-TYPE] START END make a partition

name NUMBER NAME name partition NUMBER as NAME

print [devices|free|list,all|NUMBER] display the partition table, available

devices, free space, all found partitions, or a particular partition

quit exit program

rescue START END rescue a lost partition near START and END

resizepart NUMBER END resize partition NUMBER

rm NUMBER delete partition NUMBER

select DEVICE choose the device to edit

disk_set FLAG STATE change the FLAG on selected device

disk_toggle [FLAG] toggle the state of FLAG on selected device

set NUMBER FLAG STATE change the FLAG on partition NUMBER

toggle [NUMBER [FLAG]] toggle the state of FLAG on partition NUMBE

unit UNIT set the default unit to UNIT

version display the version number and copyright

information of GNU Parted

(parted)

(parted) w

align-check TYPE N check partition N for TYPE(min|opt)

alignment

help [COMMAND] print general help, or help on COMMAND

mklabel,mktable LABEL-TYPE create a new disklabel (partition table)

mkpart PART-TYPE [FS-TYPE] START END make a partition

name NUMBER NAME name partition NUMBER as NAME

print [devices|free|list,all|NUMBER] display the partition table, available

devices, free space, all found partitions, or a particular partition

quit exit program

rescue START END rescue a lost partition near START and END

resizepart NUMBER END resize partition NUMBER

rm NUMBER delete partition NUMBER

select DEVICE choose the device to edit

disk_set FLAG STATE change the FLAG on selected device

disk_toggle [FLAG] toggle the state of FLAG on selected device

set NUMBER FLAG STATE change the FLAG on partition NUMBER

toggle [NUMBER [FLAG]] toggle the state of FLAG on partition NUMBE

unit UNIT set the default unit to UNIT

version display the version number and copyright

information of GNU Parted

(parted) w

align-check TYPE N check partition N for TYPE(min|opt)

(parted) w

PE create a new disklabel (partition table)

(parted) w

align-check TYPE N check partition N for TYPE(min|opt)

alignment

help [COMMAND] print general help, or help on COMMAND

mklabel,mktable LABEL-TYPE create a new disklabel (partition table)

mkpart PART-TYPE [FS-TYPE] START END make a partition

name NUMBER NAME name partition NUMBER as NAME

print [devices|free|list,all|NUMBER] display the partition table, available

devices, free space, all found partitions, or a particular partition

quit exit program

rescue START END rescue a lost partition near START and END

resizepart NUMBER END resize partition NUMBER

rm NUMBER delete partition NUMBER

select DEVICE choose the device to edit

disk_set FLAG STATE change the FLAG on selected device

disk_toggle [FLAG] toggle the state of FLAG on selected device

set NUMBER FLAG STATE change the FLAG on partition NUMBER

toggle [NUMBER [FLAG]] toggle the state of FLAG on partition NUMBE

unit UNIT set the default unit to UNIT

version display the version number and copyright

information of GNU Parted

(parted) w

align-check TYPE N check partition N for TYPE(min|opt)

alignment

help [COMMAND] print general help, or help on COMMAND

mklabel,mktable LABEL-TYPE create a new disklabel (partition table)

mkpart PART-TYPE [FS-TYPE] START END make a partition

name NUMBER NAME name partition NUMBER as NAME

print [devices|free|list,all|NUMBER] display the partition table, available

devices, free space, all found partitions, or a particular partition

quit exit program

rescue START END rescue a lost partition near START and END

resizepart NUMBER END resize partition NUMBER

rm NUMBER delete partition NUMBER

select DEVICE choose the device to edit

disk_set FLAG STATE change the FLAG on selected device

disk_toggle [FLAG] toggle the state of FLAG on selected device

set NUMBER FLAG STATE change the FLAG on partition NUMBER

toggle [NUMBER [FLAG]] toggle the state of FLAG on partition NUMBE

unit UNIT set the default unit to UNIT

version display the version number and copyright

information of GNU Parted

(parted) w

align-check TYPE N check partition N for TYPE(min|opt)

alignment

help [COMMAND] print general help, or help on COMMAND

mklabel,mktable LABEL-TYPE create a new disklabel (partition table)

mkpart PART-TYPE [FS-TYPE] START END make a partition

name NUMBER NAME name partition NUMBER as NAME

print [devices|free|list,all|NUMBER] display the partition table, available

devices, free space, all found partitions, or a particular partition

quit exit program

rescue START END rescue a lost partition near START and END

resizepart NUMBER END resize partition NUMBER

rm NUMBER delete partition NUMBER

select DEVICE choose the device to edit

disk_set FLAG STATE change the FLAG on selected device

disk_toggle [FLAG] toggle the state of FLAG on selected device

set NUMBER FLAG STATE change the FLAG on partition NUMBER

toggle [NUMBER [FLAG]] toggle the state of FLAG on partition NUMBE

unit UNIT set the default unit to UNIT

version display the version number and copyright

information of GNU Parted

(parted) w

align-check TYPE N check partition N for TYPE(min|opt)

alignment

help [COMMAND] print general help, or help on COMMAND

mklabel,mktable LABEL-TYPE create a new disklabel (partition table)

mkpart PART-TYPE [FS-TYPE] START END make a partition

name NUMBER NAME name partition NUMBER as NAME

print [devices|free|list,all|NUMBER] display the partition table, available

devices, free space, all found partitions, or a particular partition

quit exit program

rescue START END rescue a lost partition near START and END

resizepart NUMBER END resize partition NUMBER

rm NUMBER delete partition NUMBER

select DEVICE choose the device to edit

disk_set FLAG STATE change the FLAG on selected device

disk_toggle [FLAG] toggle the state of FLAG on selected device

set NUMBER FLAG STATE change the FLAG on partition NUMBER

toggle [NUMBER [FLAG]] toggle the state of FLAG on partition NUMBE

unit UNIT set the default unit to UNIT

version display the version number and copyright

information of GNU Parted

(parted) w

information of GNU Parted

(parted) w

(parted) q

Information: You may need to update /etc/fstab.

[root@longjie ~]# parted /dev/sdb

GNU Parted 3.1

Using /dev/sdb

Welcome to GNU Parted! Type 'help' to view a list of commands.

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

2 481MB 481MB 512B primary

1 481MB 580MB 98.6MB primary

3 581MB 600MB 18.9MB logic

(parted) mklabel gpt

Warning: Partition(s) on /dev/sdb are being used.

Ignore/Cancel? I

Warning: The existing disk label on /dev/sdb will be destroyed and all data on this di

will be lost. Do you want to continue?

Yes/No? Y

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? I

(parted) P

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

(parted) mkpart primary 0 480

Warning: The resulting partition is not properly aligned for best performance.

Ignore/Cancel? i

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? i

(parted) mkpart primary 481 580

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? i

(parted) mkpart logic 581 600

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? i

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

1 17.4kB 480MB 480MB primary

2 481MB 580MB 98.6MB primary

3 581MB 600MB 18.9MB logic

(parted) rm 4

Error: Partition doesn't exist.

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

1 17.4kB 480MB 480MB primary

2 481MB 580MB 98.6MB primary

3 581MB 600MB 18.9MB logic

(parted)

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

1 17.4kB 480MB 480MB primary

2 481MB 580MB 98.6MB primary

3 581MB 600MB 18.9MB logic

(parted) q

Information: You may need to update /etc/fstab.

[root@longjie ~]# parted /dev/sdb

GNU Parted 3.1

Using /dev/sdb

Welcome to GNU Parted! Type 'help' to view a list of commands.

(parted) help

align-check TYPE N check partition N for TYPE(min|opt)

alignment

help [COMMAND] print general help, or help on COMMAND

mklabel,mktable LABEL-TYPE create a new disklabel (partition table)

mkpart PART-TYPE [FS-TYPE] START END make a partition

name NUMBER NAME name partition NUMBER as NAME

print [devices|free|list,all|NUMBER] display the partition table, available

devices, free space, all found partitions, or a particular partition

quit exit program

rescue START END rescue a lost partition near START and END

resizepart NUMBER END resize partition NUMBER

rm NUMBER delete partition NUMBER

select DEVICE choose the device to edit

disk_set FLAG STATE change the FLAG on selected device

disk_toggle [FLAG] toggle the state of FLAG on selected device

set NUMBER FLAG STATE change the FLAG on partition NUMBER

toggle [NUMBER [FLAG]] toggle the state of FLAG on partition NUMBE

unit UNIT set the default unit to UNIT

version display the version number and copyright

information of GNU Parted

(parted) mklabel gpt

Warning: Partition(s) on /dev/sdb are being used.

Ignore/Cancel? I

Warning: The existing disk label on /dev/sdb will be destroyed and all data on this di

will be lost. Do you want to continue?

Yes/No? Y

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? I

(parted)

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

(parted) mkpart primary 0 480

Warning: The resulting partition is not properly aligned for best performance.

Ignore/Cancel? i

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? i

(parted) mkpart primary 481 580

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? i

(parted) mkpart primary 481 580

Warning: You requested a partition from 481MB to 580MB (sectors 939453..1132812).

The closest location we can manage is 481MB to 481MB (sectors 940031..940031).

Is this still acceptable to you?

Yes/No? Y

Warning: The resulting partition is not properly aligned for best performance.

Ignore/Cancel? I

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? I

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

1 17.4kB 480MB 480MB primary

3 481MB 481MB 512B primary

2 481MB 580MB 98.6MB primary

(parted) mkpart logic 581 600

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? i

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

1 17.4kB 480MB 480MB primary

3 481MB 481MB 512B primary

2 481MB 580MB 98.6MB primary

4 581MB 600MB 18.9MB logic

(parted) rm 4

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? i

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: gpt

Disk Flags:

Number Start End Size File system Name Flags

1 17.4kB 480MB 480MB primary

3 481MB 481MB 512B primary

2 481MB 580MB 98.6MB primary

(parted) mklabel msdos

Warning: Partition(s) on /dev/sdb are being used.

Ignore/Cancel? i

Warning: The existing disk label on /dev/sdb will be destroyed and all data on this di

will be lost. Do you want to continue?

Yes/No? y

Error: Partition(s) 1 on /dev/sdb have been written, but we have been unable to inform

the kernel of the change, probably because it/they are in use. As a result, the old

partition(s) will remain in use. You should reboot now before making further changes.

Ignore/Cancel? i

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdb: 1074MB

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

Partition Table: msdos

Disk Flags:

Number Start End Size Type File system Flags

(parted) q

Information: You may need to update /etc/fstab.

[root@longjie ~]# fdisk /dev/sdb

Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.

Be careful before using the write command.

Command (m for help): n

Partition type:

p primary (0 primary, 0 extended, 4 free)

e extended

Select (default p): p

Partition number (1-4, default 1):

First sector (2048-2097151, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-2097151, default 2097151): +100M

Partition 1 of type Linux and of size 100 MiB is set

Command (m for help): p

Disk /dev/sdb: 1073 MB, 1073741824 bytes, 2097152 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk label type: dos

Disk identifier: 0x000c641e

Device Boot Start End Blocks Id System

/dev/sdb1 2048 206847 102400 83 Linux

Command (m for help): o

Building a new DOS disklabel with disk identifier 0x410e00b5.

Command (m for help): p

Disk /dev/sdb: 1073 MB, 1073741824 bytes, 2097152 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk label type: dos

Disk identifier: 0x410e00b5

Device Boot Start End Blocks Id System

Command (m for help): n

Partition type:

p primary (0 primary, 0 extended, 4 free)

e extended

Select (default p): p

Partition number (1-4, default 1):

First sector (2048-2097151, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-2097151, default 2097151): +100M

Partition 1 of type Linux and of size 100 MiB is set

Command (m for help): p

Disk /dev/sdb: 1073 MB, 1073741824 bytes, 2097152 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk label type: dos

Disk identifier: 0x410e00b5

Device Boot Start End Blocks Id System

/dev/sdb1 2048 206847 102400 83 Linux

Command (m for help): n

Partition type:

p primary (1 primary, 0 extended, 3 free)

e extended

Select (default p):

Using default response p

Partition number (2-4, default 2):

First sector (206848-2097151, default 206848):

Using default value 206848

Last sector, +sectors or +size{K,M,G} (206848-2097151, default 2097151): +100M

Partition 2 of type Linux and of size 100 MiB is set

Command (m for help): p

Disk /dev/sdb: 1073 MB, 1073741824 bytes, 2097152 sectors

Units = sectors of 1 * 512 = 512 bytes

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

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

Disk label type: dos

Disk identifier: 0x410e00b5

Device Boot Start End Blocks Id System

/dev/sdb1 2048 206847 102400 83 Linux

/dev/sdb2 206848 411647 102400 83 Linux

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.

The kernel still uses the old table. The new table will be used at

the next reboot or after you run partprobe(8) or kpartx(8)

Syncing disks.

[root@longjie ~]# ls -l /dev/sdb*

brw-rw---- 1 root disk 8, 16 Mar 29 19:15 /dev/sdb

brw-rw---- 1 root disk 8, 17 Mar 29 19:15 /dev/sdb1

[root@longjie ~]# mkfs -t ext4 /dev/sdb1

mke2fs 1.42.9 (28-Dec-2013)

/dev/sdb1 is mounted; will not make a filesystem here!

[root@longjie ~]# mount /dev/sdb1 /mnt

mount: /dev/sdb1 is already mounted or /mnt busy

/dev/sdb1 is already mounted on /mnt

[root@longjie ~]# df -h

[root@longjie ~]# touch /mnt/dengli

[root@longjie ~]# ls /mnt

dengli lost+found

[root@longjie ~]# cd /mnt

[root@longjie /mnt]# umount /mnt

umount: /mnt: target is busy.

(In some cases useful info about processes that use

the device is found by lsof(8) or fuser(1))

[root@longjie /mnt]# umount /mnt

umount: /mnt: target is busy.

(In some cases useful info about processes that use

the device is found by lsof(8) or fuser(1))

[root@longjie /mnt]# pwd

/mnt

[root@longjie /mnt]# umount -lf /mnt

[root@longjie /mnt]# df -h

[root@longjie /mnt]# cd

[root@longjie ~]# mount /dev/sdb2/opt

mount: can't find /dev/sdb2/opt in /etc/fstab

[root@longjie ~]# mount /dev/sdb1/opt

mount: can't find /dev/sdb1/opt in /etc/fstab

[root@longjie ~]# mkfs.xfs /dev/sdb2

/dev/sdb2: No such file or directory

[root@longjie ~]# mount -t xfs /dev/sdb1 /opt

[root@longjie /opt]# cd

[root@longjie ~]# cd /mnt

[root@longjie /mnt]# ls

[root@longjie /mnt]# df -h

[root@longjie ~]# mount /dev/sdb2 /opt

[root@longjie ~]# cd /opt

[root@longjie /opt]# df -h

[root@longjie /opt]# cd

[root@longjie ~]# touch /opt/lili

[root@longjie ~]# ls /opt

lili

[root@longjie ~]# cat /ect/fstab

[root@longjie ~]# blkid

[root@longjie ~]# tail -1 /etc/fstab

/dev/mapper/centos-swap swap swap defaults 0 0

[root@longjie ~]# /sbin/mount -t xfs /dev/sdb2/opt

-bash: /sbin/mount: No such file or directory

[root@longjie ~]# /sbin/mount -t xfs /dev/sdb1/opt

[root@longjie ~]# df -h

"/etc/rc.local" 13L, 507C written

[root@longjie ~]# df -h

[root@longjie ~]# df -i

[root@longjie ~]# blkid

/dev/sda1: UUID="c599f129-ac55-4795-88cf-79800447c570" TYPE="xfs"

[root@longjie ~]# dumpe2fs /dev/sdb1

[root@longjie ~]# dumpe2fs /dev/sdb1|egrep -i "size"

[root@longjie ~]# xfs

-bash: xfs: command not found

[root@longjie ~]# xfs_

-bash: xfs_: command not found

[root@longjie ~]# xfs_

[root@longjie ~]# fsck

fsck from util-linux 2.23.2

[root@longjie ~]# reboot

Connection closing...Socket close.

Connection closed by foreign host.

Disconnected from remote host(10.0.0.200:22) at 19:49:28.

Type `help' to learn how to use Xshell prompt.

[D:\~]$ ssh root@10.0.0.200

Connecting to 10.0.0.200:22...

[root@longjie ~]# df -h

[root@longjie ~]# vim /etc/rc.local

# Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure

# that this script will be executed during boot.

/sbin/mount -t xfs /dev/sdb2 /opt

touch /var/lock/subsys/local

/dev/mapper/centos-root / xfs defaults 0 0

UUID=c599f129-ac55-4795-88cf-79800447c570 /boot xfs defaults

0 0

/sbin/mount -t xfs /dev/sdb2 /opt

/dev/mapper/centos-swap swap swap defaults 0 0

"/etc/fstab" 13L, 500C written

[root@longjie ~]# reboot

[D:\~]$ ssh root@10.0.0.200

[root@longjie ~]# cat /etc/rc.local

/sbin/mount -t xfs /dev/sdb2 /opt

touch /var/lock/subsys/local

[root@longjie ~]# df -h

Filesystem Size Used Avail Use% Mounted on

[root@longjie ~]# vim /etc/rc.local

#!/bin/bash

# THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES

"/etc/rc.local" 13L, 474C written

[root@longjie ~]# vim /etc/fstab

"/etc/fstab" 13L, 544C written

[root@longjie ~]# reboot

Connection closing...Socket close.

Connection closed by foreign host.

Disconnected from remote host(10.0.0.200:22) at 20:11:12.

Type `help' to learn how to use Xshell prompt.

[D:\~]$ ssh root@10.0.0.200

Connecting to 10.0.0.200:22...

Connection established.

To escape to local shell, press 'Ctrl+Alt+]'.

WARNING! The remote SSH server rejected X11 forwarding request.

Last login: Fri Mar 29 20:08:08 2019 from 10.0.0.1

-bash: /etc/bashrc: Permission denied

[root@longjie ~]# df -s

df: invalid option -- 's'

Try 'df --help' for more information.

[root@longjie ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/centos-root 17G 1.6G 15G 10% /

devtmpfs 899M 0 899M 0% /dev

tmpfs 911M 0 911M 0% /dev/shm

tmpfs 911M 9.6M 902M 2% /run

tmpfs 911M 0 911M 0% /sys/fs/cgroup

/dev/sdb2 97M 5.2M 92M 6% /opt

/dev/sda1 2.0G 143M 1.9G 8% /boot

tmpfs 183M 0 183M 0% /run/user/0

2019-03-29实践课堂笔记

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