Ubuntu16.04无损分区大小调整工具Gparted

Ubuntu16.04⽆损分区⼤⼩调整⼯具Gparted
Ubuntu 16.04⽆损分区⼤⼩调整⼯具Gparted
2018年03⽉13⽇ 16:16:46 阅读数：11868更多
个⼈分类：
安装：
sudo apt-get install gparted
使⽤：
注意：
这款软件可以调整分区⼤⼩，且⽀持⽆损，但是对于/根⽬录的分区⽆法调整，但是它提供ISO⼯具，可以启动后进⾏调整。

当然，还可以使⽤Ubuntu的Live CD进去使⽤这个⼯具，完美解决。

在linux中，当我们给系统添加⼀块新硬盘时，我们是⽆法使⽤的，因为他还没有分区和格式化，只有当我们将新硬盘分区并格式化之后，挂载在某个⽬录下，才能供我们正常使⽤，接下来我们要学习三种硬盘分区⼯具，fdisk，gdisk，parted，分别是针对于MBR分区格式，GPT 分区格式，⾼级分区⼯具（可以针对于上⾯两种进⾏分区，使⽤起来也是⽐较复杂的），关于MBR和GPT请参考
fdisk（MBR）
fdisk
-l /dev/sdX 查看硬盘分区信息
-c （centos6) 打开或禁⽤dos模式
-u (centos6) 切换显⽰的单位(扇区/柱⾯)
-c (centos7) -c=dos -c=nondos
-u (centos7) -u=cylinders -u=sectors
fdisk /dev/sdX 进⾏分区
m 帮助
n 建⽴分区
d 删除分区
p 显⽰分区信息
t 转换分区类型
a 将指定分区设置/取消活动分区
L 查看分区类型
o 重建分区表
v 验证分区表，显⽰剩余没有被分区划分的扇区数量
g 创建GPT格式的分区（centos7)
q 退出不保存，不保存，所有的修改都不⽣效
w 退出并保存
[root@CT6 ~]# fdisk -l /dev/sdb
WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdb: 536.9 GB, 536870912000 bytes -------------------------硬盘⼤⼩
255 heads, 63 sectors/track, 65270 cylinders ------------------------磁头数，每磁道扇区数，柱⾯数
Units = cylinders of 16065 * 512 = 8225280 bytes --------------------每柱⾯⼤⼩
Sector size (logical/physical): 512 bytes / 512 bytes ---------------扇区⼤⼩
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000 -----------------------------------------未分区磁盘
[root@CT6 ~]# fdisk /dev/sdb --------------------------磁盘分区
WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted. Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x52ce01ab.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
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): m ------------------------查看帮助
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delet
e a partition
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help):
Command (m for help): n ------------------------------添加⼀个分区
Command action
e extended
p primary partition (1-4)
p ---------------------------------------------添加主分区
Partition number (1-4): 1 ----------------------------磁盘编号1，即：sdb1
First cylinder (1-65270, default 1): -------------------开始位置，不填写，默认就⾏
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-65270, default 65270): +20G -----------填写⼤⼩
Command (m for help): p --------------------------------查看刚刚的分区
Disk /dev/sdb: 536.9 GB, 536870912000 bytes
255 heads, 63 sectors/track, 65270 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x52ce01ab
Device Boot Start End Blocks Id System
/dev/sdb1 1 2612 20980858+ 83 Linux -----------------创建了⼀个分区
Command (m for help): l ------------------查看可⽤的分区类型
0 Empty 24 NEC DOS 81 Minix / old Lin bf Solaris
1 FAT1
2 39 Plan 9 82 Linux swap / So c1 DRDOS/sec (FAT-
2 XENIX root 3c PartitionMagic 8
3 Linux c
4 DRDOS/sec (FAT-
3 XENIX usr 40 Venix 80286 8
4 OS/2 hidden C: c6 DRDOS/sec (FAT-
4 FAT16 <32M 41 PPC PReP Boot 8
5 Linux extended c7 Syrinx
5 Extended 42 SFS 8
6 NTFS volume set da Non-FS data
6 FAT16 4d QNX4.x 8
7 NTFS volume set db CP/M / CTOS / .
7 HPFS/NTFS 4e QNX4.x 2nd part 88 Linux plaintext de Dell Utility
8 AIX 4f QNX4.x 3rd part 8e Linux LVM df BootIt
9 AIX bootable 50 OnTrack DM 93 Amoeba e1 DOS access
a OS/2 Boot Manag 51 OnTrack DM6 Aux 94 Amoeba BBT e3 DOS R/O
b W95 FAT32 52 CP/M 9f BSD/OS e4 SpeedStor
c W95 FAT32 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpa
d hi eb BeOS fs
e W95 FAT16 (LBA) 54 OnTrackDM6 a5 FreeBSD ee GPT
f W95 Ext'd (LBA) 55 EZ-Drive a6 OpenBSD ef EFI (FAT-12/16/
10 OPUS 56 Golden Bow a7 NeXTSTEP f0 Linux/PA-RISC b
11 Hidden FAT12 5c Priam Edisk a8 Darwin UFS f1 SpeedStor
12 Compaq diagnost 61 SpeedStor a9 NetBSD f4 SpeedStor
14 Hidden FAT16 <3 63 GNU HURD or Sys ab Darwin boot f2 DOS secondary
16 Hidden FAT16 64 Novell Netware af HFS / HFS+ fb VMware VMFS
17 Hidden HPFS/NTF 65 Novell Netware b7 BSDI fs fc VMware VMKCORE
18 AST SmartSleep 70 DiskSecure Mult b8 BSDI swap fd Linux raid auto
1b Hidden W95 FAT3 75 PC/IX bb Boot Wizard hid fe LANstep
1c Hidden W95 FAT3 80 Old Minix be Solaris boot ff BBT
1e Hidden W95 FAT1
Command (m for help):
Command (m for help): w -----------------------保存并退出
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
gdisk（GPT）
gdisk
-l /dev/sdX 查看分区信息
gdisk
(?|m) 帮助
n 建⽴分区
d 删除分区
c 更改分区名字
I 显⽰分区的详细信息
p 显⽰分区信息
t转换分区类型
a 将指定分区设置/取消活动分区
l 查看分区类型
o 重建分区表
v 验证分区表，显⽰剩余没有被分区划分的扇区数量
q 退出不保存，不保存，所有的修改都不⽣效
w 退出并保存
gdisk时⽤来创建GPT分区的，我们可以看到，gdisk和fdisk的开头是有些不同的。

[root@CT6 ~]# gdisk /dev/sdb
GPT fdisk (gdisk) version 0.8.10
Partition table scan:
MBR: not present
BSD: not present
APM: not present
GPT: present
Found valid GPT with corrupt MBR; using GPT and will write new
protective MBR on save.
Command (? for help):
⼀个GPT分区
Command (? for help): o
This option deletes all partitions and creates a new protective MBR.
Proceed? (Y/N): y
Command (? for help): p
Disk /dev/sdb: 1048576000 sectors, 500.0 GiB ----------------磁盘⼤⼩，显⽰扇区数
Logical sector size: 512 bytes ---------------------------扇区⼤⼩
Disk identifier (GUID): E072194E-C4DA-449B-9CF9-E5171235E6D3
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 1048575966 -------------------第⼀个有⽤的扇区在34，最后⼀个有⽤的扇区在104857966
Partitions will be aligned on 2048-sector boundaries
Total free space is 1048575933 sectors (500.0 GiB)
Number Start (sector) End (sector) Size Code Name
Command (? for help):
更改磁盘的类型
Command (? for help): t ------------------------------------------更改磁盘类型
Using 1
Current type is 'Linux filesystem'
Hex code or GUID (L to show codes, Enter = 8300): 8e00
Changed type of partition to 'Linux LVM' -------------------------更改为"Linux LVM"
Command (? for help): p
Disk /dev/sdb: 1048576000 sectors, 500.0 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): E072194E-C4DA-449B-9CF9-E5171235E6D3
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 1048575966
Partitions will be aligned on 2048-sector boundaries
Total free space is 838860733 sectors (400.0 GiB)
Number Start (sector) End (sector) Size Code Name
1 2048 209717247 100.0 GiB 8E00 Linux LVM ------------------------ 改过了
Command (? for help):
当我们查看磁盘的时候，我们⾸先要看磁盘是那种分区格式的，如果是MBR分区格式，我们最好使⽤fdisk –l，要是为GPT分区格式的硬盘，我们就使⽤gdisk –l来查看。

因为fdisk查看GPT格式的磁盘最⼤能看到2T，再多的磁盘分区就⽆法查看，还会出错。

parted(⾼级分区⼯具)
parted命令是由GNU组织开发的⼀款功能强⼤的磁盘分区和分区⼤⼩调整⼯具，与fdisk不同，它⽀持调整分区的⼤⼩。

作为⼀种设计⽤于Linux的⼯具，它没有构建成处理与fdisk关联的多种分区类型，但是，它可以处理最常见的分区格式，包括：ext2、ext3、fat16、fat32、NTFS、ReiserFS、JFS、XFS、UFS、HFS以及Linux交换分区。

parted
-h 显⽰帮助信息
-l 显⽰磁盘信息
-s 脚本模式，不提⽰⽤户
-v 显⽰版本号
[root@CT6 ~]# parted -h
Usage: parted [OPTION]... [DEVICE [COMMAND [PARAMETERS]...]...]
Apply COMMANDs with PARAMETERS to DEVICE. If no COMMAND(s) are given, run in interactive mode.
OPTIONs:
-h, --help displays this help message
-l, --list lists partition layout on all block devices
-m, --machine displays machine parseable output
-s, --script never prompts for user intervention
-v, --version displays the version
-a, --align=[none|cyl|min|opt] alignment for new partitions
COMMANDs:
align-check TYPE N check partition N for TYPE(min|opt)
alignment
check NUMBER do a simple check on the file system
cp [FROM-DEVICE] FROM-NUMBER TO-NUMBER copy file system to another partition ... ...
[root@CT6 ~]# parted -l
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sda: 215GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 1049kB 1075MB 1074MB primary ext4 boot
2 1075MB 54.8GB 53.7GB primary ext4
3 54.8GB 108GB 53.7GB primary ext4
4 108GB 215GB 106GB extended
5 108GB 113GB 4295MB logical linux-swap(v1)
6 113GB 134GB 21.5GB logical
parted /dev/sdX 分区
mklabel label_type 设置分区格式（MBR，GPT）
mkpart part-type [fs-type] start end(单位Mb)设置分区
print 查看分区信息
help [command] 查看命令[command]如何使⽤
rm num 删除⼀个分区
set num flag status 设置flag（boot，root，swap）状态（on，off）
quit 退出
开始分区
[root@CT6 ~]# parted /dev/sdb
GNU Parted 2.1
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted)
查看帮助
(parted) help
align-check TYPE N check partition N for TYPE(min|opt) alignment
check NUMBER do a simple check on the file system
cp [FROM-DEVICE] FROM-NUMBER TO-NUMBER copy file system to another partition
help [COMMAND] print general help, or help on COMMAND --------------------查看命令如何使⽤
mklabel,mktable LABEL-TYPE create a new disklabel (partition table) ------------------设置磁盘类型
mkfs NUMBER FS-TYPE make a FS-TYPE file system on partition NUMBER
mkpart PART-TYPE [FS-TYPE] START END make a partition -------------------------------------------磁盘分区
mkpartfs PART-TYPE FS-TYPE START END make a partition with a file system
move NUMBER START END move partition NUMBER
name NUMBER NAME name partition NUMBER as NAME
print [devices|free|list,all|NUMBER] display the partition table, available devices, --------------查看分区
free space, all found partitions, or a particular partition
quit exit program
rescue START END rescue a lost partition near START and END
resize NUMBER START END resize partition NUMBER and its file system
rm NUMBER delete partition NUMBER -----------------------------------删除分区
select DEVICE choose the device to edit
set NUMBER FLAG STATE change the FLAG on partition NUMBER
toggle [NUMBER [FLAG]] toggle the state of FLAG on partition NUMBER
unit UNIT set the default unit to UNIT
version display the version number and copyright
information of GNU Parted
(parted)
(parted) help mklabel
mklabel,mktable LABEL-TYPE create a new disklabel (partition table)
LABEL-TYPE is one of: aix, amiga, bsd, dvh, gpt, mac, msdos, pc98, sun, loop --------------可以设置的类型
(parted)
(parted) mklabel gpt ------------------------------设置GPT分区
(parted) print
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 537GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
(parted)
(parted) help mkpart ----------------------------------查看分区命令如何⽤
mkpart PART-TYPE [FS-TYPE] START END make a partition
PART-TYPE is one of: primary, logical, extended
FS-TYPE is one of: ext4, ext3, ext2, fat32, fat16, hfsx, hfs+, hfs, jfs, swsusp,
linux-swap(v1), linux-swap(v0), ntfs, reiserfs, hp-ufs, sun-ufs, xfs, apfs2, apfs1,
asfs, amufs5, amufs4, amufs3, amufs2, amufs1, amufs0, amufs, affs7, affs6, affs5,
affs4, affs3, affs2, affs1, affs0, linux-swap, linux-swap(new), linux-swap(old)
START and END are disk locations, such as 4GB or 10%. Negative values count from
the end of the disk. For example, -1s specifies exactly the last sector.
'mkpart' makes a partition without creating a new file system on the partition.
FS-TYPE may be specified to set an appropriate partition ID.
(parted) mkpart primary 0 200G -------------------------------------------------设置分区
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? ignore
(parted) print -----------------------------------------------------查看分区
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 537GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 17.4kB 200GB 200GB primary -------------------------------分区⼤⼩
(parted) quit
Information: You may need to update /etc/fstab.
这个命令是⼀个实时⽣效的命令，当我们分完⼀个区后，不⽤结束就可以直接⽣效，不像fdisk和gdisk那样需要退出后才保存⽣效。

lsblk
列出块设备
lsblk命令⽤于列出所有可⽤块设备的信息，⽽且还能显⽰他们之间的依赖关系，但是它不会列出RAM盘的信息。

块设备有硬盘，闪存
盘，cd-ROM等等
如：
lsblk /dev/sdb
[root@CT6 ~]# lsblk /dev/sda
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 200G 0 disk
├─sda1 8:1 0 1G 0 part /boot
├─sda2 8:2 0 50G 0 part /
├─sda3 8:3 0 50G 0 part /app
├─sda4 8:4 0 1K 0 part
├─sda5 8:5 0 4G 0 part [SWAP]
└─sda6 8:6 0 20G 0 part
查看内核是否已经识别新的分区：
cat /proc/partations
[root@CT6 ~]# cat /proc/partitions
major minor #blocks name
8 0 209715200 sda
8 1 1048576 sda1
8 2 52428800 sda2
8 3 52428800 sda3
8 4 1 sda4
8 5 4194304 sda5
8 6 20980890 sda6
8 16 524288000 sdb
8 17 195312483 sdb1
我们在原硬盘未使⽤的空间进⾏分区后，在物理设备上已经完成了，使⽤fdisk -l可以查看到，但是内存信息中并没有新的分区信息，此时我们需要⼿动更新分区表，在centOS6中使⽤partx，在5 或者7中可以使⽤partprobe（这个在6中有BUG）
partx -a /dev/sda 更新内存中的磁盘分区表信息
partx -d --nr 6 /dev/sda 删除掉在内存中的已经删除的第六块分区的信息
刚开始我们就五个分区，⽆论是内存中的信息，还是物理硬盘
[root@CT6 ~]# lsblk /dev/sda
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 200G 0 disk
├─sda1 8:1 0 1G 0 part /boot
├─sda2 8:2 0 50G 0 part /
├─sda3 8:3 0 50G 0 part /app
├─sda4 8:4 0 1K 0 part
└─sda5 8:5 0 4G 0 part [SWAP]
[root@CT6 ~]# fdisk -l /dev/sda | grep "^/dev/sda*"
/dev/sda1 * 1 131 1048576 83 Linux
/dev/sda2 131 6658 52428800 83 Linux
/dev/sda3 6658 13185 52428800 83 Linux
/dev/sda4 13185 26109 103808000 5 Extended
/dev/sda5 13186 13708 4194304 82 Linux swap / Solaris
接下来，我们创建⼀个分区
Command (m for help): n
First cylinder (13185-26109, default 13185): 14000
Last cylinder, +cylinders or +size{K,M,G} (14000-26109, default 26109): +10G
Command (m for help): p
Disk /dev/sda: 214.7 GB, 214748364800 bytes
255 heads, 63 sectors/track, 26108 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0007a903
Device Boot Start End Blocks Id System
/dev/sda1 * 1 131 1048576 83 Linux
/dev/sda2 131 6658 52428800 83 Linux
/dev/sda3 6658 13185 52428800 83 Linux
/dev/sda4 13185 26109 103808000 5 Extended
/dev/sda5 13186 13708 4194304 82 Linux swap / Solaris
/dev/sda6 14000 15305 10490444+ 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.
我们在分完区以后，如上，显⽰的红⾊字体，我们刚刚分好的区并没有被读⼊内存当中，也就是说我们fdisk可以读到，但是lsblk却⽆法读到[root@CT6 ~]# fdisk -l /dev/sda | grep "^/dev/sda.*"
/dev/sda1 * 1 131 1048576 83 Linux
/dev/sda2 131 6658 52428800 83 Linux
/dev/sda3 6658 13185 52428800 83 Linux
/dev/sda4 13185 26109 103808000 5 Extended
/dev/sda5 13186 13708 4194304 82 Linux swap / Solaris
/dev/sda6 14000 15305 10490444+ 83 Linux
[root@CT6 ~]# lsblk /dev/sda
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 200G 0 disk
├─sda1 8:1 0 1G 0 part /boot
├─sda2 8:2 0 50G 0 part /
├─sda3 8:3 0 50G 0 part /app
├─sda4 8:4 0 1K 0 part
└─sda5 8:5 0 4G 0 part [SWAP]
接下来我们更新⼀下分区信息
[root@CT6 ~]# partx -a /dev/sda
BLKPG: Device or resource busy
error adding partition 1
BLKPG: Device or resource busy
error adding partition 2
BLKPG: Device or resource busy
error adding partition 3
BLKPG: Device or resource busy
error adding partition 4
BLKPG: Device or resource busy
error adding partition 5
[root@CT6 ~]# lsblk /dev/sda
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 200G 0 disk
├─sda1 8:1 0 1G 0 part /boot
├─sda2 8:2 0 50G 0 part /
├─sda3 8:3 0 50G 0 part /app
├─sda4 8:4 0 1K 0 part
├─sda5 8:5 0 4G 0 part [SWAP]
└─sda6 8:6 0 10G 0 part
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