[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 ~]# partprobe /dev/sdb
[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
o
[root@longjie /opt]# cd
[root@longjie ~]# cd /mnt
[root@longjie /mnt]# ls
[root@longjie /mnt]# df -h
m
[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 ~]# 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
