linux下移动磁盘空间

发布时间：2014-09-05 13:54:36作者：知识屋

linux下移动磁盘空间

目的：将/home下的磁盘空间移动到/下面

操作：

1.查看磁盘空间情况

[root@compute home]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/vg_compute-lv_root

531G 48G 478G 10% /

tmpfs 16G 88K 16G 1% /dev/shm

/dev/mapper/ddf1_4c5349202020202010000055000000004711471100001450p1

485M 38M 422M 9% /boot

2.卸载/home

umount /home/

3.查看逻辑卷组信息

[root@compute home]# vgs

VG #PV #LV #SN Attr VSize VFree

vg_compute 1 3 0 wz--n- 556.44g 712.00m

4.检查磁盘是否正常

e2fsck -f /dev/vg_compute/lv_home

5.缩小/home磁盘大小

resize2fs /dev/vg_compute/lv_home 1024M

lvreduce -L 1024M /dev/vg_compute/lv_home

6.扩展/磁盘大小

lvextend -L + 489G /dev/vg_compute/lv_root

resize2fs /dev/vg_compute/lv_root

7.挂载/home

mount /home

8./home下的用户文件夹恢复

一、新建用户文件夹并修改所属权限

mkdir /home/shome

chown shome:shome /home/shome

二、将 /etc/skel 目录里所有的文件(隐藏文件) 复制到用户的默认目录里即可解决问题.

cp /etc/skel/.bash* /home/shome/

在Centos中创建新用户,但不知道为什么在用户的默认目录文件夹里没有产生".bash_profile".

在切换到新用户的时候,会出现下面的问题,不会出现shell的名字

解决方法:

将 /etc/skel 目录里所有的文件(隐藏文件) 复制到用户的默认目录里即可解决问题.

由于Openstack的Volume需要一块独立的分卷，所以我在分区的时候就直接创建了一个Volume作为vg。这里注意vg的名字一定要为"nova-vloumes",通过vgdisplay可以查看

附录：

一 pvs,lvs vgs 使用

--1.1 显示物理卷(pv)信息

[root@redhat6 lvm]# pvs

PV VG Fmt Attr PSize PFree

/dev/sda2 vg_redhat6 lvm2 a-- 14.51g 0

/dev/sdb vg_redhat6 lvm2 a-- 4.00g 2.81g

--1.2 显示逻辑卷组(vg)信息

[root@redhat6 lvm]# vgs

VG #PV #LV #SN Attr VSize VFree

vg_redhat6 2 3 0 wz--n- 18.50g 2.81g

--1.3显示逻辑卷(lv)信息

[root@redhat6 lvm]# lvs

LV VG Attr LSize Origin Snap% Move Log Copy% Convert

lv_pgdata_01 vg_redhat6 -wi-ao 700.00m

lv_root vg_redhat6 -wi-ao 13.10g

lv_swap vg_redhat6 -wi-ao 1.91g

备注：前面的 pvs,lvs,vgs 命令简单显示 LVM 对像信息，都是默认的输出。

二格式化控制

--2.1 显示额外信息

[root@redhat6 lvm]# pvs -v

Scanning for physical volume names

PV VG Fmt Attr PSize PFree DevSize PV UUID

/dev/sda2 vg_redhat6 lvm2 a-- 14.51g 0 14.51g dpTW84-DHRy-PIA9-u1tY-YUH4-XQKw-8Hy2Zm

/dev/sdb vg_redhat6 lvm2 a-- 4.00g 2.81g 4.00g YKIQwX-zc6H-TZ65-P3qr-sRfk-LX0p-T18vdG

[root@redhat6 lvm]# vgs -v

Finding all volume groups

Finding volume group "vg_redhat6"

VG Attr Ext #PV #LV #SN VSize VFree VG UUID

vg_redhat6 wz--n- 4.00m 2 3 0 18.50g 2.81g E6cA2U-TL1x-ScCV-UnGU-3Kq4-1u6V-WUb5L4

备注：增加 -v 参数，会显示LVM 对像的额外信息，例如 UUID字段。

--2.2 pvs 默认输出

[root@redhat6 lvm]# pvs

PV VG Fmt Attr PSize PFree

/dev/sda2 vg_redhat6 lvm2 a-- 14.51g 0

/dev/sdb vg_redhat6 lvm2 a-- 4.00g 2.81g

--2.3 只显示 pv_name,dev_size 字段

[root@redhat6 lvm]# pvs -o pv_name,dev_size

PV DevSize

/dev/sda2 14.51g

/dev/sdb 4.00g

备注：增加 -o 参数，指定需要输出的字段。

--2.4 在pvs 默认输出上，增加字段

[root@redhat6 lvm]# pvs

PV VG Fmt Attr PSize PFree

/dev/sda2 vg_redhat6 lvm2 a-- 14.51g 0

/dev/sdb vg_redhat6 lvm2 a-- 4.00g 2.81g

[root@redhat6 lvm]# pvs -o +pv_uuid

PV VG Fmt Attr PSize PFree PV UUID

/dev/sda2 vg_redhat6 lvm2 a-- 14.51g 0 dpTW84-DHRy-PIA9-u1tY-YUH4-XQKw-8Hy2Zm

/dev/sdb vg_redhat6 lvm2 a-- 4.00g 2.81g YKIQwX-zc6H-TZ65-P3qr-sRfk-LX0p-T18vdG

备注：如果想在默认输出的前提下增加字段，可以使用 -o + 字段名。

--2.5 vgs 显示卷组成员

[root@redhat6 lvm]# vgs

VG #PV #LV #SN Attr VSize VFree

vg_redhat6 2 3 0 wz--n- 18.50g 2.81g

[root@redhat6 lvm]# vgs -o +lv_name

VG #PV #LV #SN Attr VSize VFree LV

vg_redhat6 2 3 0 wz--n- 18.50g 2.81g lv_root

vg_redhat6 2 3 0 wz--n- 18.50g 2.81g lv_swap

vg_redhat6 2 3 0 wz--n- 18.50g 2.81g lv_pgdata_01

三字段排序

--3.1 根据 lv_size 字段排序

[root@redhat6 lvm]# lvs

LV VG Attr LSize Origin Snap% Move Log Copy% Convert

lv_pgdata_01 vg_redhat6 -wi-ao 700.00m

lv_root vg_redhat6 -wi-ao 13.10g

lv_swap vg_redhat6 -wi-ao 1.91g

[root@redhat6 lvm]# lvs -O lv_size

LV VG Attr LSize Origin Snap% Move Log Copy% Convert

lv_pgdata_01 vg_redhat6 -wi-ao 700.00m

lv_swap vg_redhat6 -wi-ao 1.91g

lv_root vg_redhat6 -wi-ao 13.10g

备注：如果想根据输出字段排序，可以使用 -O 字段名选项。

四附 lvs,vgs,pvs 字段

--4.1 lvs 字段

---------------------

lv_all - All fields in this section.

lv_uuid - Unique identifier.

lv_name - Name. LVs created for internal use are enclosed in brackets.

lv_path - Full pathname for LV.

lv_attr - Various attributes - see man page.

lv_major - Persistent major number or -1 if not persistent.

lv_minor - Persistent minor number or -1 if not persistent.

lv_read_ahead - Read ahead setting in current units.

lv_kernel_major - Currently assigned major number or -1 if LV is not active.

lv_kernel_minor - Currently assigned minor number or -1 if LV is not active.

lv_kernel_read_ahead - Currently-in-use read ahead setting in current units.

lv_size - Size of LV in current units.

seg_count - Number of segments in LV.

origin - For snapshots, the origin device of this LV.

origin_size - For snapshots, the size of the origin device of this LV.

snap_percent - For snapshots, the percentage full if LV is active.

copy_percent - For mirrors and pvmove, current percentage in-sync.

move_pv - For pvmove, Source PV of temporary LV created by pvmove.

convert_lv - For lvconvert, Name of temporary LV created by lvconvert.

lv_tags - Tags, if any.

mirror_log - For mirrors, the LV holding the synchronisation log.

modules - Kernel device-mapper modules required for this LV.

--4.2 pvs 字段

pv_all - All fields in this section.

pe_start - Offset to the start of data on the underlying device.

pv_size - Size of PV in current units.

pv_free - Total amount of unallocated space in current units.

pv_used - Total amount of allocated space in current units.

pv_attr - Various attributes - see man page.

pv_pe_count - Total number of Physical Extents.

pv_pe_alloc_count - Total number of allocated Physical Extents.

pv_tags - Tags, if any.

pv_mda_count - Number of metadata areas on this device.

pv_mda_used_count - Number of metadata areas in use on this device.

--4.3 vgs 字段

vg_all - All fields in this section.

vg_fmt - Type of metadata.

vg_uuid - Unique identifier.

vg_name - Name.

vg_attr - Various attributes - see man page.

vg_size - Total size of VG in current units.

vg_free - Total amount of free space in current units.

vg_sysid - System ID indicating when and where it was created.

vg_extent_size - Size of Physical Extents in current units.

vg_extent_count - Total number of Physical Extents.

vg_free_count - Total number of unallocated Physical Extents.

max_lv - Maximum number of LVs allowed in VG or 0 if unlimited.

max_pv - Maximum number of PVs allowed in VG or 0 if unlimited.

pv_count - Number of PVs.

lv_count - Number of LVs.

snap_count - Number of snapshots.

vg_seqno - Revision number of internal metadata. Incremented whenever it changes.

vg_tags - Tags, if any.

vg_mda_count - Number of metadata areas on this VG.

vg_mda_used_count - Number of metadata areas in use on this VG.

vg_mda_free - Free metadata area space for this VG in current units.

vg_mda_size - Size of smallest metadata area for this VG in current units.

vg_mda_copies - Target number of in use metadata areas in the VG.

（免责声明：文章内容如涉及作品内容、版权和其它问题，请及时与我们联系，我们将在第一时间删除内容，文章内容仅供参考）

上一篇:阿里云上的工作脚本

下一篇:SHELL命令――取路径和文件名：dirname basename

软件推荐

更多 >

游戏推荐

更多 >

精选栏目

手机游戏

手机软件

电脑软件

猜你喜欢

资讯射击不上征信战斗挂机摄影社交投屏棋牌经营彩票办公导航二次元闯关学习购物生活放置养成铃声传奇吃鸡即时辅助趣味战国通讯剧情阅读模拟理财网贷借钱教育 WIFI 格斗财经影音直播三国街机魔幻英语口语招聘武侠换装 RPG 360 联机运动

linux下移动磁盘空间

相关知识

软件推荐

游戏推荐

精选栏目

win10

YLMF—OS

Win—XP

windows8

linux

windows7

热门推荐

手机游戏

手机软件

电脑软件

猜你喜欢