{"id":753,"date":"2021-09-17T16:21:46","date_gmt":"2021-09-17T08:21:46","guid":{"rendered":"http:\/\/www.danios.com\/?p=753"},"modified":"2021-12-20T10:42:29","modified_gmt":"2021-12-20T02:42:29","slug":"linuxfilesystem-lvm2-until","status":"publish","type":"post","link":"https:\/\/www.oceansource.cc\/?p=753","title":{"rendered":"28\u3001LVM2\u8be6\u89e3\u53cauntil"},"content":{"rendered":"\n

28.1 LVM<\/p>\n\n\n\n

Logical Volume Manager,Version: 2<\/p>\n\n\n\n

28.1.1 DM\u548cMD<\/p>\n\n\n\n

cat \/proc\/filesystems : \u67e5\u770b\u5f53\u524d\u5185\u6838\u6240\u652f\u6301\u6587\u4ef6\u7cfb\u7edf\u7c7b\u578b<\/p>\n\n\n\n

RAID: \u72ec\u7acb\u5197\u4f59\u78c1\u76d8\u9635\u5217<\/p>\n\n\n\n

Linux\uff1a\u786c\u4ef6\uff0c\u8f6f\u4ef6<\/p>\n\n\n\n

\/dev\/md#<\/p>\n\n\n\n

Linux\u4e2d\u4e24\u79cd\u4e0d\u540c\u7684\u8bbe\u5907\u7c7b\u578b<\/p>\n\n\n\n

MD: Multi Device, \u591a\u8bbe\u5907<\/p>\n\n\n\n

MD, DM<\/p>\n\n\n\n

\/dev\/md#<\/p>\n\n\n\n

meta device<\/p>\n\n\n\n

DM: Device Mapper,\u5c06\u4e00\u4e2a\u6216\u591a\u4e2a\u5e95\u5c42\u5757\u8bbe\u5907\u7ec4\u7ec7\u6210\u4e00\u4e2a\u903b\u8f91\u8bbe\u5907\u7684\u6a21\u5757<\/p>\n\n\n\n

\u903b\u8f91\u8bbe\u5907<\/p>\n\n\n\n

RAID, LVM2\uff08\u903b\u8f91\u5377\uff09<\/p>\n\n\n\n

DM: \u901a\u5e38\u7528\u4e8eLVM2<\/p>\n\n\n\n

\/dev\/dm-#<\/p>\n\n\n\n

\u7ec4\u4ef6\uff1a<\/p>\n\n\n\n

\u5feb\u7167\uff1a\u5c06\u8981\u6539\u53d8\u7684\u6570\u636e\u8fdb\u884c\u5907\u4efd\uff0c\u5b9e\u73b0\u6570\u636e\u7684\u5907\u4efd\uff08\u6570\u636e\u5907\u4efd\uff1a\u907f\u514d\u56e0\u4e3a\u8bef\u64cd\u4f5c\u6216\u8005\u6587\u4ef6\u5220\u9664\u7684\u60c5\u51b5\u9020\u6210\u7684\u635f\u5931\uff09<\/p>\n\n\n\n

\u591a\u8def\u5f84<\/p>\n\n\n\n

\u7269\u7406\u5377\uff08PE\uff09-\u300b\u5377\u7ec4\uff08VG\uff09-\u300b\u903b\u8f91\u5377\uff08LE\uff09<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

28.2 PV\uff0cVG\u7ba1\u7406<\/p>\n\n\n\n

28.2.1 PV\u7ba1\u7406\u5de5\u5177<\/p>\n\n\n\n

pvs\uff1a\u7b80\u8981pv\u4fe1\u606f\u5c55\u793a<\/p>\n\n\n\n

pvdisplay:\u663e\u793apv\u7684\u8be6\u7ec6\u4fe1\u606f<\/p>\n\n\n\n

pvcreate \/dev\/DEVICE:\u521b\u5efaPV<\/p>\n\n\n\n

-v \u663e\u793a\u521b\u5efa\u8fc7\u7a0b<\/p>\n\n\n\n

pvmove:pv\u79fb\u9664\uff0c\u5728vgreduce\u4e4b\u524d\u8981\u5148\u79fb\u9664<\/p>\n\n\n\n

[root@localhost ~]# pvs<\/p>\n\n\n\n

  \/dev\/md0: read failed after 0 of 4096 at 0: Input\/output error<\/p>\n\n\n\n

  PV         VG     Fmt  Attr PSize   PFree<\/p>\n\n\n\n

  \/dev\/sdb2  centos lvm2 a–  <99.00g 4.00m<\/p>\n\n\n\n

[root@localhost ~]# pvdisplay<\/p>\n\n\n\n

  \/dev\/md0: read failed after 0 of 4096 at 0: Input\/output error<\/p>\n\n\n\n

  — Physical volume —<\/p>\n\n\n\n

  PV Name               \/dev\/sdb2<\/p>\n\n\n\n

  VG Name               centos<\/p>\n\n\n\n

  PV Size               <99.00 GiB \/ not usable 3.00 MiB<\/p>\n\n\n\n

  Allocatable           yes <\/p>\n\n\n\n

  PE Size               4.00 MiB<\/p>\n\n\n\n

  Total PE              25343<\/p>\n\n\n\n

  Free PE               1<\/p>\n\n\n\n

  Allocated PE          25342<\/p>\n\n\n\n

  PV UUID               0R0BFP-witm-SfMZ-d9an-26rT-JDtg-XzwGqy<\/p>\n\n\n\n

[root@localhost ~]# <\/p>\n\n\n\n

28.2.2 VG\u7ba1\u7406\u5de5\u5177<\/p>\n\n\n\n

vgcreate VG_NAME \/PATH\/TO\/PV\uff1a\u521b\u5efavg<\/p>\n\n\n\n

-v \u663e\u793a\u8fc7\u7a0b<\/p>\n\n\n\n

-s #: PE\u5927\u5c0f\uff0c\u9ed8\u8ba4\u4e3a4MB<\/p>\n\n\n\n

vgs\uff1a\u7b80\u8981vg\u4fe1\u606f\u5c55\u793a<\/p>\n\n\n\n

vgdisplay\uff1a\u663e\u793apv\u7684\u8be6\u7ec6\u4fe1\u606f<\/p>\n\n\n\n

vgextend:\u6269\u5c55<\/p>\n\n\n\n

vgreduce\uff1avg\u7f29\u51cf<\/p>\n\n\n\n

vgremove:\u5220\u9664vg<\/p>\n\n\n\n

28.3 lv\u903b\u8f91\u5377\u914d\u7f6e<\/p>\n\n\n\n

28.3.1 LV\u7ba1\u7406\u5de5\u5177<\/p>\n\n\n\n

lvs:\u7b80\u8981lv\u4fe1\u606f\u5c55\u793a<\/p>\n\n\n\n

lvdisplay:\u663e\u793alv\u7684\u8be6\u7ec6\u4fe1\u606f<\/p>\n\n\n\n

lvcreate -n LV_NAME -L #[mMgGtT] VG_NAME\uff1a\u521b\u5efalv<\/p>\n\n\n\n

-n\uff1a\u6307\u660e\u903b\u8f91\u5377\u540d\u79f0<\/p>\n\n\n\n

-L\uff1a\u6307\u5b9a\u5927\u5c0f<\/p>\n\n\n\n

-l\uff1a\u6307\u5b9a\u903b\u8f91\u76d8\u533a\u7684\u6570\u91cf<\/p>\n\n\n\n

lvremove\uff1a\u5220\u9664\u903b\u8f91\u5377<\/p>\n\n\n\n

\u521b\u5efa\u5206\u533a\uff1a\u521b\u5efa\u7269\u7406\u8fb9\u754c<\/p>\n\n\n\n

\u521b\u5efa\u6587\u4ef6\u7cfb\u7edf\uff1a\u521b\u5efa\u903b\u8f91\u8fb9\u754c\uff08\u7d27\u8d34\u7740\u7269\u7406\u8fb9\u754c\uff09<\/p>\n\n\n\n

28.3.2 \u6269\u5c55\u903b\u8f91\u5377\uff1b<\/p>\n\n\n\n

lvextend\uff1a\u6269\u5c55\u903b\u8f91\u5377\u7269\u7406\u8fb9\u754c<\/p>\n\n\n\n

-L [+]#[mMgGtT] \/dev\/VG_NAME\/LV_NAME<\/p>\n\n\n\n

+\u53ef\u5e26\u53ef\u4e0d\u5e26\uff0c\u4e0d\u5e26\u7684\u8bdd\u4ee3\u8868\u7684\u662f\u6269\u5c55\u7684\u76ee\u6807\u5927\u5c0f<\/p>\n\n\n\n

resize2fs\uff1a\u6269\u5c55\u6587\u4ef6\u7cfb\u7edf\u8fb9\u754c(\u4e0d\u6307\u5b9a\u5927\u5c0f\u5219\u4e3a\u4f7f\u7528\u5206\u533a\u6240\u6709\u5927\u5c0f)<\/p>\n\n\n\n

resize2fs -p \/PATH\/TO\/LV<\/p>\n\n\n\n

28.3.3 \u7f29\u51cf\u903b\u8f91\u5377\uff1b<\/p>\n\n\n\n

\u6ce8\u610f\uff1a1\u3001\u4e0d\u80fd\u5728\u7ebf\u7f29\u51cf\uff0c\u5fc5\u987b\u5148\u5378\u8f7d\uff1b<\/p>\n\n\n\n

  2\u3001\u786e\u4fdd\u7f29\u51cf\u540e\u7684\u7a7a\u95f4\u5927\u5c0f\u4f9d\u7136\u80fd\u5b58\u50a8\u539f\u6709\u7684\u6240\u6709\u6570\u636e\uff1b<\/p>\n\n\n\n

  3\u3001\u5728\u7f29\u51cf\u4e4b\u524d\u5e94\u8be5\u5148\u5f3a\u884c\u68c0\u67e5\u6587\u4ef6\uff0c\u4ee5\u786e\u4fdd\u6587\u4ef6\u7cfb\u7edf\u5904\u4e8e\u4e00\u81f3\u6027\u72b6\u6001\uff1b<\/p>\n\n\n\n

\u64cd\u4f5c\u8fc7\u7a0b\uff1a<\/p>\n\n\n\n

df -lh<\/p>\n\n\n\n

umount<\/p>\n\n\n\n

e2fsck -f         <\/p>\n\n\n\n

resize2fs\uff1a\u7f29\u51cf\u6587\u4ef6\u7cfb\u7edf\u8fb9\u754c<\/p>\n\n\n\n

resize2fs \/PATH\/TO\/PV 3G<\/p>\n\n\n\n

lvreduce -L [-]# \/PATH\/TO\/LV\uff08\u7f29\u51cf\u903b\u8f91\u5377\u7269\u7406\u8fb9\u754c\uff09<\/p>\n\n\n\n

mount\u91cd\u65b0\u6302\u8f7d<\/p>\n\n\n\n

[root@localhost ~]# umount \/test<\/p>\n\n\n\n

[root@localhost ~]# mount \/test<\/p>\n\n\n\n

mount: cant find \/test in \/etc\/fstab<\/p>\n\n\n\n

[root@localhost ~]# mount \/dev\/mypv\/mvvg \/test<\/p>\n\n\n\n

mount: special device \/dev\/mypv\/mvvg does not exist<\/p>\n\n\n\n

[root@localhost ~]# mount \/dev\/mypv\/myvg \/test<\/p>\n\n\n\n

mount: special device \/dev\/mypv\/myvg does not exist<\/p>\n\n\n\n

[root@localhost ~]# mount \/dev\/myvg\/mylv \/test<\/p>\n\n\n\n

[root@localhost ~]# resize<\/p>\n\n\n\n

resize2fs   resizecons  resizepart  <\/p>\n\n\n\n

[root@localhost ~]# resize<\/p>\n\n\n\n

resize2fs   resizecons  resizepart  <\/p>\n\n\n\n

[root@localhost ~]# resize2fs \/dev\/myvg\/mylv <\/p>\n\n\n\n

resize2fs 1.42.9 (28-Dec-2013)<\/p>\n\n\n\n

Filesystem at \/dev\/myvg\/mylv is mounted on \/test; on-line resizing required<\/p>\n\n\n\n

old_desc_blocks = 16, new_desc_blocks = 40<\/p>\n\n\n\n

The filesystem on \/dev\/myvg\/mylv is now 5242880 blocks long.<\/p>\n\n\n\n

[root@localhost ~]# df -lh<\/p>\n\n\n\n

Filesystem               Size  Used Avail Use% Mounted on<\/p>\n\n\n\n

\/dev\/mapper\/centos-root   50G  2.6G   48G   6% \/<\/p>\n\n\n\n

devtmpfs                 3.9G     0  3.9G   0% \/dev<\/p>\n\n\n\n

tmpfs                    3.9G     0  3.9G   0% \/dev\/shm<\/p>\n\n\n\n

tmpfs                    3.9G  8.7M  3.9G   1% \/run<\/p>\n\n\n\n

tmpfs                    3.9G     0  3.9G   0% \/sys\/fs\/cgroup<\/p>\n\n\n\n

\/dev\/sda1               1014M  143M  872M  15% \/boot<\/p>\n\n\n\n

\/dev\/mapper\/centos-home   42G   33M   42G   1% \/home<\/p>\n\n\n\n

tmpfs                    781M     0  781M   0% \/run\/user\/0<\/p>\n\n\n\n

\/dev\/mapper\/myvg-mylv    4.9G  3.2M  4.7G   1% \/test<\/p>\n\n\n\n

[root@localhost ~]# umount \/dev\/myvg\/mylv<\/p>\n\n\n\n

[root@localhost ~]# e2fsck -f \/dev\/myvg\/mylv<\/p>\n\n\n\n

e2fsck 1.42.9 (28-Dec-2013)<\/p>\n\n\n\n

Pass 1: Checking inodes, blocks, and sizes<\/p>\n\n\n\n

Pass 2: Checking directory structure<\/p>\n\n\n\n

Pass 3: Checking directory connectivity<\/p>\n\n\n\n

Pass 4: Checking reference counts<\/p>\n\n\n\n

Pass 5: Checking group summary information<\/p>\n\n\n\n

MYLV: 12\/327680 files (0.0% non-contiguous), 119806\/5242880 blocks<\/p>\n\n\n\n

[root@localhost ~]# resize2fs \/dev\/myvg\/mylv 3G<\/p>\n\n\n\n

resize2fs 1.42.9 (28-Dec-2013)<\/p>\n\n\n\n

Resizing the filesystem on \/dev\/myvg\/mylv to 3145728 (1k) blocks.<\/p>\n\n\n\n

The filesystem on \/dev\/myvg\/mylv is now 3145728 blocks long.<\/p>\n\n\n\n

[root@localhost ~]# lvreduce \/dev\/myvg\/mylv 3G<\/p>\n\n\n\n

  No command with matching syntax recognised.  Run ‘lvreduce –help’ for more information.<\/p>\n\n\n\n

  Correct command syntax is:<\/p>\n\n\n\n

  lvreduce -L|–size [-]Size[m|UNIT] LV<\/p>\n\n\n\n

[root@localhost ~]# lvreduce \/dev\/myvg\/mylv -L 3G<\/p>\n\n\n\n

  WARNING: Reducing active logical volume to 3.00 GiB.<\/p>\n\n\n\n

  THIS MAY DESTROY YOUR DATA (filesystem etc.)<\/p>\n\n\n\n

Do you really want to reduce myvg\/mylv? [y\/n]: y<\/p>\n\n\n\n

  Size of logical volume myvg\/mylv changed from 5.00 GiB (1280 extents) to 3.00 GiB (768 extents).<\/p>\n\n\n\n

  Logical volume myvg\/mylv successfully resized.<\/p>\n\n\n\n

[root@localhost ~]# mount \/dev\/myvg\/mylv \/test<\/p>\n\n\n\n

[root@localhost ~]# df -lh<\/p>\n\n\n\n

Filesystem               Size  Used Avail Use% Mounted on<\/p>\n\n\n\n

\/dev\/mapper\/centos-root   50G  2.6G   48G   6% \/<\/p>\n\n\n\n

devtmpfs                 3.9G     0  3.9G   0% \/dev<\/p>\n\n\n\n

tmpfs                    3.9G     0  3.9G   0% \/dev\/shm<\/p>\n\n\n\n

tmpfs                    3.9G  8.7M  3.9G   1% \/run<\/p>\n\n\n\n

tmpfs                    3.9G     0  3.9G   0% \/sys\/fs\/cgroup<\/p>\n\n\n\n

\/dev\/sda1               1014M  143M  872M  15% \/boot<\/p>\n\n\n\n

\/dev\/mapper\/centos-home   42G   33M   42G   1% \/home<\/p>\n\n\n\n

tmpfs                    781M     0  781M   0% \/run\/user\/0<\/p>\n\n\n\n

\/dev\/mapper\/myvg-mylv    3.0G  3.2M  2.8G   1% \/test<\/p>\n\n\n\n

[root@localhost ~]# <\/p>\n\n\n\n

28.3.4 \u5feb\u7167\u5377\uff08snapshot\uff09<\/p>\n\n\n\n

1\u3001\u751f\u547d\u5468\u671f\u4e3a\u6574\u4e2a\u6570\u636e\u65f6\u957f\uff1b\u5728\u8fd9\u6bb5\u65f6\u957f\u5185\uff0c\u6570\u636e\u7684\u589e\u957f\u91cf\u4e0d\u80fd\u8d85\u51fa\u5feb\u7167\u5377\u5927\u5c0f\uff1b<\/p>\n\n\n\n

2\u3001\u5feb\u7167\u5377\u5e94\u8be5\u662f\u53ea\u8bfb\u7684\uff1b<\/p>\n\n\n\n

3\u3001\u8ddf\u539f\u5377\u5728\u540c\u4e00\u5377\u7ec4\u5185\uff1b<\/p>\n\n\n\n

\u521b\u5efa\u8fc7\u7a0b<\/p>\n\n\n\n

lvcreate<\/p>\n\n\n\n

-s\uff1a\u521b\u5efa\u5feb\u7167\u5377<\/p>\n\n\n\n

-p r|w\uff1a\u6307\u5b9a\u6743\u9650<\/p>\n\n\n\n

lvcreate -L # -n SLV_NAME -p r \/PATH\/TO\/LV<\/p>\n\n\n\n

\u7ec3\u4e601\uff1a\u521b\u5efa\u4e00\u4e2a\u81f3\u5c11\u6709\u4e24\u4e2aPV\u7ec4\u6210\u7684\u5927\u5c0f\u4e3a20G\u7684\u540d\u4e3atestvg\u7684VG\uff0c\u8981\u6c42PE\u5927\u5c0f\u4e3a16MB\uff0c\u800c\u540e\u5728\u5377\u7ec4\u4e2d\u521b\u5efa\u5927\u5c0f\u4e3a5G\u903b\u8f91\u5377testlv\uff0c\u6302\u8f7d\u81f3\u3001users\u76ee\u5f55<\/p>\n\n\n\n

[root@localhost ~]# pvcreate \/dev\/sdc<\/p>\n\n\n\n

  Physical volume “\/dev\/sdc” successfully created.<\/p>\n\n\n\n

[root@localhost ~]# pvs<\/p>\n\n\n\n

  PV         VG     Fmt  Attr PSize   PFree <\/p>\n\n\n\n

  \/dev\/sda2  centos lvm2 a–  <99.00g  4.00m<\/p>\n\n\n\n

  \/dev\/sdb          lvm2 —   20.00g 20.00g<\/p>\n\n\n\n

  \/dev\/sdc          lvm2 —   20.00g 20.00g<\/p>\n\n\n\n

[root@localhost ~]# vgcreate vg1 -s 16 \/dev\/sdb<\/p>\n\n\n\n

  Volume group “vg1” successfully created<\/p>\n\n\n\n

[root@localhost ~]# vgextend vg1 -s 16 \/dev\/sdc<\/p>\n\n\n\n

vgextend: invalid option — ‘s’<\/p>\n\n\n\n

  Error during parsing of command line.<\/p>\n\n\n\n

[root@localhost ~]# vgextend vg1 \/dev\/sdc<\/p>\n\n\n\n

  Volume group “vg1” successfully extended<\/p>\n\n\n\n

[root@localhost ~]# vgdisplay <\/p>\n\n\n\n

  — Volume group —<\/p>\n\n\n\n

  VG Name               centos<\/p>\n\n\n\n

  System ID             <\/p>\n\n\n\n

  Format                lvm2<\/p>\n\n\n\n

  Metadata Areas        1<\/p>\n\n\n\n

  Metadata Sequence No  4<\/p>\n\n\n\n

  VG Access             read\/write<\/p>\n\n\n\n

  VG Status             resizable<\/p>\n\n\n\n

  MAX LV                0<\/p>\n\n\n\n

  Cur LV                3<\/p>\n\n\n\n

  Open LV               3<\/p>\n\n\n\n

  Max PV                0<\/p>\n\n\n\n

  Cur PV                1<\/p>\n\n\n\n

  Act PV                1<\/p>\n\n\n\n

  VG Size               <99.00 GiB<\/p>\n\n\n\n

  PE Size               4.00 MiB<\/p>\n\n\n\n

  Total PE              25343<\/p>\n\n\n\n

  Alloc PE \/ Size       25342 \/ 98.99 GiB<\/p>\n\n\n\n

  Free  PE \/ Size       1 \/ 4.00 MiB<\/p>\n\n\n\n

  VG UUID               fE3YOB-nPtn-bYfY-RZX4-moqi-3YMu-6deJXo<\/p>\n\n\n\n

  — Volume group —<\/p>\n\n\n\n

  VG Name               vg1<\/p>\n\n\n\n

  System ID             <\/p>\n\n\n\n

  Format                lvm2<\/p>\n\n\n\n

  Metadata Areas        2<\/p>\n\n\n\n

  Metadata Sequence No  2<\/p>\n\n\n\n

  VG Access             read\/write<\/p>\n\n\n\n

  VG Status             resizable<\/p>\n\n\n\n

  MAX LV                0<\/p>\n\n\n\n

  Cur LV                0<\/p>\n\n\n\n

  Open LV               0<\/p>\n\n\n\n

  Max PV                0<\/p>\n\n\n\n

  Cur PV                2<\/p>\n\n\n\n

  Act PV                2<\/p>\n\n\n\n

  VG Size               <39.97 GiB<\/p>\n\n\n\n

  PE Size               16.00 MiB<\/p>\n\n\n\n

  Total PE              2558<\/p>\n\n\n\n

  Alloc PE \/ Size       0 \/ 0   <\/p>\n\n\n\n

  Free  PE \/ Size       2558 \/ <39.97 GiB<\/p>\n\n\n\n

  VG UUID               Qf0Sfr-gRzG-vmmJ-7mTK-NUln-LlRj-U2IYJ2<\/p>\n\n\n\n

[root@localhost ~]# lvcreate -n testlv -L 5G vg1<\/p>\n\n\n\n

WARNING: ext4 signature detected on \/dev\/vg1\/testlv at offset 1080. Wipe it? [y\/n]: y<\/p>\n\n\n\n

  Wiping ext4 signature on \/dev\/vg1\/testlv.<\/p>\n\n\n\n

  Logical volume “testlv” created.<\/p>\n\n\n\n

[root@localhost ~]# mkdir \/users<\/p>\n\n\n\n

[root@localhost ~]# mke2fs -t ext4 \/dev\/vg1\/testlv <\/p>\n\n\n\n

mke2fs 1.42.9 (28-Dec-2013)<\/p>\n\n\n\n

Filesystem label=<\/p>\n\n\n\n

OS type: Linux<\/p>\n\n\n\n

Block size=4096 (log=2)<\/p>\n\n\n\n

Fragment size=4096 (log=2)<\/p>\n\n\n\n

Stride=0 blocks, Stripe width=0 blocks<\/p>\n\n\n\n

327680 inodes, 1310720 blocks<\/p>\n\n\n\n

65536 blocks (5.00%) reserved for the super user<\/p>\n\n\n\n

First data block=0<\/p>\n\n\n\n

Maximum filesystem blocks=1342177280<\/p>\n\n\n\n

40 block groups<\/p>\n\n\n\n

32768 blocks per group, 32768 fragments per group<\/p>\n\n\n\n

8192 inodes per group<\/p>\n\n\n\n

Superblock backups stored on blocks: <\/p>\n\n\n\n

    32768, 98304, 163840, 229376, 294912, 819200, 884736<\/p>\n\n\n\n

Allocating group tables: done                            <\/p>\n\n\n\n

Writing inode tables: done                            <\/p>\n\n\n\n

Creating journal (32768 blocks): done<\/p>\n\n\n\n

Writing superblocks and filesystem accounting information: done <\/p>\n\n\n\n

[root@localhost ~]# mount \/dev\/vg1\/testlv \/users<\/p>\n\n\n\n

[root@localhost ~]# mount<\/p>\n\n\n\n

sysfs on \/sys type sysfs (rw,nosuid,nodev,noexec,relatime,seclabel)<\/p>\n\n\n\n

proc on \/proc type proc (rw,nosuid,nodev,noexec,relatime)<\/p>\n\n\n\n

devtmpfs on \/dev type devtmpfs (rw,nosuid,seclabel,size=3985976k,nr_inodes=996494,mode=755)<\/p>\n\n\n\n

securityfs on \/sys\/kernel\/security type securityfs (rw,nosuid,nodev,noexec,relatime)<\/p>\n\n\n\n

tmpfs on \/dev\/shm type tmpfs (rw,nosuid,nodev,seclabel)<\/p>\n\n\n\n

devpts on \/dev\/pts type devpts (rw,nosuid,noexec,relatime,seclabel,gid=5,mode=620,ptmxmode=000)<\/p>\n\n\n\n

tmpfs on \/run type tmpfs (rw,nosuid,nodev,seclabel,mode=755)<\/p>\n\n\n\n

tmpfs on \/sys\/fs\/cgroup type tmpfs (ro,nosuid,nodev,noexec,seclabel,mode=755)<\/p>\n\n\n\n

cgroup on \/sys\/fs\/cgroup\/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=\/usr\/lib\/systemd\/systemd-cgroups-agent,name=systemd)<\/p>\n\n\n\n

pstore on \/sys\/fs\/pstore type pstore (rw,nosuid,nodev,noexec,relatime)<\/p>\n\n\n\n

cgroup on \/sys\/fs\/cgroup\/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)<\/p>\n\n\n\n

cgroup on \/sys\/fs\/cgroup\/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_prio,net_cls)<\/p>\n\n\n\n

cgroup on \/sys\/fs\/cgroup\/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu)<\/p>\n\n\n\n

cgroup on \/sys\/fs\/cgroup\/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)<\/p>\n\n\n\n

cgroup on \/sys\/fs\/cgroup\/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)<\/p>\n\n\n\n

cgroup on \/sys\/fs\/cgroup\/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)<\/p>\n\n\n\n

cgroup on \/sys\/fs\/cgroup\/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)<\/p>\n\n\n\n

cgroup on \/sys\/fs\/cgroup\/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)<\/p>\n\n\n\n

cgroup on \/sys\/fs\/cgroup\/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)<\/p>\n\n\n\n

cgroup on \/sys\/fs\/cgroup\/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)<\/p>\n\n\n\n

configfs on \/sys\/kernel\/config type configfs (rw,relatime)<\/p>\n\n\n\n

\/dev\/mapper\/centos-root on \/ type xfs (rw,relatime,seclabel,attr2,inode64,noquota)<\/p>\n\n\n\n

selinuxfs on \/sys\/fs\/selinux type selinuxfs (rw,relatime)<\/p>\n\n\n\n

systemd-1 on \/proc\/sys\/fs\/binfmt_misc type autofs (rw,relatime,fd=35,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=10884)<\/p>\n\n\n\n

mqueue on \/dev\/mqueue type mqueue (rw,relatime,seclabel)<\/p>\n\n\n\n

hugetlbfs on \/dev\/hugepages type hugetlbfs (rw,relatime,seclabel)<\/p>\n\n\n\n

debugfs on \/sys\/kernel\/debug type debugfs (rw,relatime)<\/p>\n\n\n\n

\/dev\/sda1 on \/boot type xfs (rw,relatime,seclabel,attr2,inode64,noquota)<\/p>\n\n\n\n

\/dev\/mapper\/centos-home on \/home type xfs (rw,relatime,seclabel,attr2,inode64,noquota)<\/p>\n\n\n\n

tmpfs on \/run\/user\/0 type tmpfs (rw,nosuid,nodev,relatime,seclabel,size=799408k,mode=700)<\/p>\n\n\n\n

\/dev\/mapper\/vg1-testlv on \/users type ext4 (rw,relatime,seclabel,data=ordered)<\/p>\n\n\n\n

\u7ec3\u4e602\uff1a\u65b0\u5efa\u7528\u6237archlinux\uff0c\u8981\u6c42\u5176\u5bb6\u76ee\u5f55\u4e3a\/users\/archlinux,\u800c\u540esu\u5207\u6362\u81f3archlinux\u7528\u6237\uff0c\u590d\u5236\/etc\/pam.d\u76ee\u5f55\u81f3\u81ea\u5df1\u7684\u5bb6\u76ee\u5f55\uff0c<\/p>\n\n\n\n

[root@localhost ~]# man useradd<\/p>\n\n\n\n

[1]+  Stopped                 man useradd<\/p>\n\n\n\n

[root@localhost ~]# ls \/<\/p>\n\n\n\n

bin  boot  dev  etc  home  lib  lib64  media  mnt  opt  proc  root  run  sbin  srv  sys  test  tmp  users  usr  var<\/p>\n\n\n\n

[root@localhost ~]# useradd -b \/users archlinux<\/p>\n\n\n\n

[root@localhost ~]# su – archlinux <\/p>\n\n\n\n

[archlinux@localhost ~]$ cp -a \/etc\/pam.d\/ ~\/<\/p>\n\n\n\n

[archlinux@localhost ~]$ ls<\/p>\n\n\n\n

pam.d<\/p>\n\n\n\n

[archlinux@localhost ~]$ <\/p>\n\n\n\n

\u7ec3\u4e603\uff1a\u6269\u5c55testlv\u81f37G\uff0c\u8981\u6c42archlinux\u7684\u6587\u4ef6\u4e0d\u80fd\u4e22\u5931<\/p>\n\n\n\n

[archlinux@localhost ~]$ lvextend -L 7G \/dev\/vg1\/testlv<\/p>\n\n\n\n

  WARNING: Running as a non-root user. Functionality may be unavailable.<\/p>\n\n\n\n

  \/run\/lvm\/lvmetad.socket: access failed: Permission denied<\/p>\n\n\n\n

  WARNING: Failed to connect to lvmetad. Falling back to device scanning.<\/p>\n\n\n\n

  \/dev\/mapper\/control: open failed: Permission denied<\/p>\n\n\n\n

  Failure to communicate with kernel device-mapper driver.<\/p>\n\n\n\n

  Incompatible libdevmapper 1.02.140-RHEL7 (2017-05-03) and kernel driver (unknown version).<\/p>\n\n\n\n

  \/run\/lock\/lvm\/V_vg1:aux: open failed: Permission denied<\/p>\n\n\n\n

  Cant get lock for vg1<\/p>\n\n\n\n

  Cannot process volume group vg1<\/p>\n\n\n\n

[archlinux@localhost ~]$ umount \/dev\/vg1\/testlv<\/p>\n\n\n\n

umount: \/users: umount failed: Operation not permitted<\/p>\n\n\n\n

[archlinux@localhost ~]$ su – root<\/p>\n\n\n\n

Password: <\/p>\n\n\n\n

Last login: Tue Jul 27 03:26:48 EDT 2021 from 192.168.77.2 on pts\/0<\/p>\n\n\n\n

[root@localhost ~]# umount \/dev\/vg1\/testlv<\/p>\n\n\n\n

umount: \/users: target is busy.<\/p>\n\n\n\n

        (In some cases useful info about processes that use<\/p>\n\n\n\n

         the device is found by lsof(8) or fuser(1))<\/p>\n\n\n\n

[root@localhost ~]# ps -ef | grep archlinux<\/p>\n\n\n\n

root       1917   1463  0 04:01 pts\/0    00:00:00 su – archlinux<\/p>\n\n\n\n

root       1974   1953  0 04:21 pts\/0    00:00:00 grep –color=auto archlinux<\/p>\n\n\n\n

[root@localhost ~]# exit<\/p>\n\n\n\n

logout<\/p>\n\n\n\n

[archlinux@localhost ~]$ exit<\/p>\n\n\n\n

logout<\/p>\n\n\n\n

[root@localhost ~]# ps -ef | grep archlinux<\/p>\n\n\n\n

root       1977   1463  0 04:22 pts\/0    00:00:00 grep –color=auto archlinux<\/p>\n\n\n\n

[root@localhost ~]# umount \/dev\/vg1\/testlv<\/p>\n\n\n\n

[root@localhost ~]# lvextend -L 7G \/dev\/vg1\/testlv<\/p>\n\n\n\n

  Size of logical volume vg1\/testlv changed from 5.00 GiB (320 extents) to 7.00 GiB (448 extents).<\/p>\n\n\n\n

  Logical volume vg1\/testlv successfully resized.<\/p>\n\n\n\n

[root@localhost ~]# resize2fs \/dev\/vg1\/testlv <\/p>\n\n\n\n

resize2fs 1.42.9 (28-Dec-2013)<\/p>\n\n\n\n

Please run ‘e2fsck -f \/dev\/vg1\/testlv’ first.<\/p>\n\n\n\n

[root@localhost ~]# e2fsck -f \/dev\/vg1\/testlv<\/p>\n\n\n\n

e2fsck 1.42.9 (28-Dec-2013)<\/p>\n\n\n\n

Pass 1: Checking inodes, blocks, and sizes<\/p>\n\n\n\n

Pass 2: Checking directory structure<\/p>\n\n\n\n

Pass 3: Checking directory connectivity<\/p>\n\n\n\n

Pass 4: Checking reference counts<\/p>\n\n\n\n

Pass 5: Checking group summary information<\/p>\n\n\n\n

\/dev\/vg1\/testlv: 48\/327680 files (0.0% non-contiguous), 58493\/1310720 blocks<\/p>\n\n\n\n

[root@localhost ~]# resize2fs \/dev\/vg1\/testlv <\/p>\n\n\n\n

resize2fs 1.42.9 (28-Dec-2013)<\/p>\n\n\n\n

Resizing the filesystem on \/dev\/vg1\/testlv to 1835008 (4k) blocks.<\/p>\n\n\n\n

The filesystem on \/dev\/vg1\/testlv is now 1835008 blocks long.<\/p>\n\n\n\n

[root@localhost ~]# mount \/dev\/vg1\/testlv \/users\/<\/p>\n\n\n\n

[root@localhost ~]# df -lh<\/p>\n\n\n\n

Filesystem               Size  Used Avail Use% Mounted on<\/p>\n\n\n\n

\/dev\/mapper\/centos-root   50G  2.6G   48G   6% \/<\/p>\n\n\n\n

devtmpfs                 3.9G     0  3.9G   0% \/dev<\/p>\n\n\n\n

tmpfs                    3.9G     0  3.9G   0% \/dev\/shm<\/p>\n\n\n\n

tmpfs                    3.9G  8.7M  3.9G   1% \/run<\/p>\n\n\n\n

tmpfs                    3.9G     0  3.9G   0% \/sys\/fs\/cgroup<\/p>\n\n\n\n

\/dev\/sda1               1014M  143M  872M  15% \/boot<\/p>\n\n\n\n

\/dev\/mapper\/centos-home   42G   33M   42G   1% \/home<\/p>\n\n\n\n

tmpfs                    781M     0  781M   0% \/run\/user\/0<\/p>\n\n\n\n

\/dev\/mapper\/vg1-testlv   6.8G   23M  6.4G   1% \/users<\/p>\n\n\n\n

[root@localhost ~]# <\/p>\n\n\n\n

[root@localhost ~]# ls \/users\/archlinux\/<\/p>\n\n\n\n

pam.d<\/p>\n\n\n\n

[root@localhost ~]# <\/p>\n\n\n\n

\u7ec3\u4e604\uff1a\u6536\u7f29testlv\u81f33G\uff0c\u8981\u6c42archlinux\u7684\u6587\u4ef6\u4e0d\u80fd\u4e22\u5931<\/p>\n\n\n\n

[root@localhost ~]# df -lh<\/p>\n\n\n\n

Filesystem               Size  Used Avail Use% Mounted on<\/p>\n\n\n\n

\/dev\/mapper\/centos-root   50G  2.6G   48G   6% \/<\/p>\n\n\n\n

devtmpfs                 3.9G     0  3.9G   0% \/dev<\/p>\n\n\n\n

tmpfs                    3.9G     0  3.9G   0% \/dev\/shm<\/p>\n\n\n\n

tmpfs                    3.9G  8.6M  3.9G   1% \/run<\/p>\n\n\n\n

tmpfs                    3.9G     0  3.9G   0% \/sys\/fs\/cgroup<\/p>\n\n\n\n

\/dev\/sda1               1014M  143M  872M  15% \/boot<\/p>\n\n\n\n

\/dev\/mapper\/centos-home   42G   33M   42G   1% \/home<\/p>\n\n\n\n

tmpfs                    781M     0  781M   0% \/run\/user\/0<\/p>\n\n\n\n

\/dev\/mapper\/vg1-testlv   6.8G   23M  6.4G   1% \/users<\/p>\n\n\n\n

[root@localhost ~]# umount \/users <\/p>\n\n\n\n

[root@localhost ~]# e2fsck -f \/dev\/vg1\/testlv<\/p>\n\n\n\n

e2fsck 1.42.9 (28-Dec-2013)<\/p>\n\n\n\n

Pass 1: Checking inodes, blocks, and sizes<\/p>\n\n\n\n

Pass 2: Checking directory structure<\/p>\n\n\n\n

Pass 3: Checking directory connectivity<\/p>\n\n\n\n

Pass 4: Checking reference counts<\/p>\n\n\n\n

Pass 5: Checking group summary information<\/p>\n\n\n\n

\/dev\/vg1\/testlv: 48\/458752 files (0.0% non-contiguous), 67358\/1835008 blocks<\/p>\n\n\n\n

[root@localhost ~]# resize2fs \/dev\/vg1\/testlv 3G<\/p>\n\n\n\n

resize2fs 1.42.9 (28-Dec-2013)<\/p>\n\n\n\n

Resizing the filesystem on \/dev\/vg1\/testlv to 786432 (4k) blocks.<\/p>\n\n\n\n

The filesystem on \/dev\/vg1\/testlv is now 786432 blocks long.<\/p>\n\n\n\n

[root@localhost ~]# lvreduce \/dev\/vg1\/testlv 3G<\/p>\n\n\n\n

  No command with matching syntax recognised.  Run ‘lvreduce –help’ for more information.<\/p>\n\n\n\n

  Correct command syntax is:<\/p>\n\n\n\n

  lvreduce -L|–size [-]Size[m|UNIT] LV<\/p>\n\n\n\n

[root@localhost ~]# lvreduce \/dev\/vg1\/testlv -L 3G<\/p>\n\n\n\n

  WARNING: Reducing active logical volume to 3.00 GiB.<\/p>\n\n\n\n

  THIS MAY DESTROY YOUR DATA (filesystem etc.)<\/p>\n\n\n\n

Do you really want to reduce vg1\/testlv? [y\/n]: y<\/p>\n\n\n\n

  Size of logical volume vg1\/testlv changed from 7.00 GiB (448 extents) to 3.00 GiB (192 extents).<\/p>\n\n\n\n

  Logical volume vg1\/testlv successfully resized.<\/p>\n\n\n\n

[root@localhost ~]# lvs<\/p>\n\n\n\n

  LV     VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert<\/p>\n\n\n\n

  home   centos -wi-ao—- <41.12g                                                    <\/p>\n\n\n\n

  root   centos -wi-ao—-  50.00g                                                    <\/p>\n\n\n\n

  swap   centos -wi-ao—-  <7.88g                                                    <\/p>\n\n\n\n

  testlv vg1    -wi-a—–   3.00g                                                    <\/p>\n\n\n\n

[root@localhost ~]# mount \/test<\/p>\n\n\n\n

mount: cant find \/test in \/etc\/fstab<\/p>\n\n\n\n

[root@localhost ~]# mount \/dev\/vg1\/testlv \/users<\/p>\n\n\n\n

[root@localhost ~]# df -lh<\/p>\n\n\n\n

Filesystem               Size  Used Avail Use% Mounted on<\/p>\n\n\n\n

\/dev\/mapper\/centos-root   50G  2.6G   48G   6% \/<\/p>\n\n\n\n

devtmpfs                 3.9G     0  3.9G   0% \/dev<\/p>\n\n\n\n

tmpfs                    3.9G     0  3.9G   0% \/dev\/shm<\/p>\n\n\n\n

tmpfs                    3.9G  8.6M  3.9G   1% \/run<\/p>\n\n\n\n

tmpfs                    3.9G     0  3.9G   0% \/sys\/fs\/cgroup<\/p>\n\n\n\n

\/dev\/sda1               1014M  143M  872M  15% \/boot<\/p>\n\n\n\n

\/dev\/mapper\/centos-home   42G   33M   42G   1% \/home<\/p>\n\n\n\n

tmpfs                    781M     0  781M   0% \/run\/user\/0<\/p>\n\n\n\n

\/dev\/mapper\/vg1-testlv   2.9G   16M  2.7G   1% \/users<\/p>\n\n\n\n

[root@localhost ~]# ls \/users\/archlinux\/<\/p>\n\n\n\n

pam.d<\/p>\n\n\n\n

[root@localhost ~]# <\/p>\n\n\n\n

\u7ec3\u4e605\uff1a\u5bf9testlv\u521b\u5efa\u5feb\u7167\uff0c\u5e76\u5c1d\u8bd5\u57fa\u4e8e\u5feb\u7167\u5907\u4efd\u6570\u636e\uff0c\u9a8c\u8bc1\u5feb\u7167\u7684\u529f\u80fd<\/p>\n\n\n\n

[root@localhost ~]# lvs<\/p>\n\n\n\n

  LV     VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert<\/p>\n\n\n\n

  home   centos -wi-ao—- <41.12g                                                    <\/p>\n\n\n\n

  root   centos -wi-ao—-  50.00g                                                    <\/p>\n\n\n\n

  swap   centos -wi-ao—-  <7.88g                                                    <\/p>\n\n\n\n

  testlv vg1    -wi-ao—-   3.00g                                                    <\/p>\n\n\n\n

[root@localhost ~]# cd \/users\/archlinux\/<\/p>\n\n\n\n

[root@localhost archlinux]# touch test<\/p>\n\n\n\n

[root@localhost archlinux]# touch test1<\/p>\n\n\n\n

[root@localhost archlinux]# ls<\/p>\n\n\n\n

test  test1<\/p>\n\n\n\n

[root@localhost archlinux]# lvcreate -s -n testlv-snap -p r -L 500M \/dev\/vg1\/testlv<\/p>\n\n\n\n

  Using default stripesize 64.00 KiB.<\/p>\n\n\n\n

  Rounding up size to full physical extent 512.00 MiB<\/p>\n\n\n\n

  Logical volume “testlv-snap” created.<\/p>\n\n\n\n

[root@localhost archlinux]# mount \/dev\/vg1\/testlv-snap \/backup\/<\/p>\n\n\n\n

mount: \/dev\/mapper\/vg1-testlv–snap is write-protected, mounting read-only<\/p>\n\n\n\n

[root@localhost archlinux]# ls \/backup\/archlinux\/<\/p>\n\n\n\n

test  test1<\/p>\n\n\n\n

[root@localhost archlinux]# rm -rf test<\/p>\n\n\n\n

[root@localhost archlinux]# ls<\/p>\n\n\n\n

test1<\/p>\n\n\n\n

[root@localhost archlinux]# ls \/backup\/archlinux\/<\/p>\n\n\n\n

test  test1<\/p>\n\n\n\n

[root@localhost archlinux]# <\/p>\n\n\n\n

28.4 \u811a\u672c\u5b8c\u6210\u78c1\u76d8\u5206\u533a\u683c\u5f0f\u5316<\/p>\n\n\n\n

28.4.1\u811a\u672c\u7f16\u7a0b\u53cauntil\u7b80\u4ecb<\/p>\n\n\n\n

1\u3001\u63a7\u5236\u7ed3\u6784<\/p>\n\n\n\n

\u811a\u672c\u7f16\u7a0b\u63a7\u5236\u7ed3\u6784\uff1a<\/p>\n\n\n\n

\u987a\u5e8f<\/p>\n\n\n\n

\u9009\u62e9<\/p>\n\n\n\n

if<\/p>\n\n\n\n

case<\/p>\n\n\n\n

\u5faa\u73af<\/p>\n\n\n\n

for<\/p>\n\n\n\n

while<\/p>\n\n\n\n

until<\/p>\n\n\n\n

2\u3001while<\/p>\n\n\n\n

while CONDITION; do<\/p>\n\n\n\n

  statment<\/p>\n\n\n\n

done<\/p>\n\n\n\n

\u8fdb\u5165\u5faa\u73af\uff1a\u6761\u4ef6\u6ee1\u8db3<\/p>\n\n\n\n

\u9000\u51fa\u5faa\u73af\uff1a\u6761\u4ef6\u4e0d\u6ee1\u8db3<\/p>\n\n\n\n

3\u3001until<\/p>\n\n\n\n

until CONDITION; do<\/p>\n\n\n\n

  statement<\/p>\n\n\n\n

  …<\/p>\n\n\n\n

done<\/p>\n\n\n\n

\u8fdb\u5165\u5faa\u73af\uff1a\u6761\u4ef6\u4e0d\u6ee1\u8db3<\/p>\n\n\n\n

\u9000\u51fa\u5faa\u73af\uff1a\u6761\u4ef6\u6ee1\u8db3<\/p>\n\n\n\n

4\u3001for\u7684\u4e24\u79cd\u5f62\u5f0f<\/p>\n\n\n\n

for \u53d8\u91cf in \u5217\u8868; do<\/p>\n\n\n\n

\u5faa\u73af\u4f53<\/p>\n\n\n\n

done<\/p>\n\n\n\n

for (( expr1 ; expr2 ; expr3 )); do {\u4f8bfor\uff08\uff08i=1;i<10;i++\uff09\uff09;do}<\/p>\n\n\n\n

  \u5faa\u73af\u4f53<\/p>\n\n\n\n

done<\/p>\n\n\n\n

5\u3001continue<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u5199\u4e00\u4e2a\u811a\u672c\uff1a<\/p>\n\n\n\n

1\u3001\u901a\u8fc7ping\u547d\u4ee4\u6d4b\u8bd5192.168.0.151\u5230192.168.0.254\u4e4b\u95f4\u7684\u6240\u6709\u4e3b\u673a\u662f\u5426\u5728\u7ebf\uff0c<\/p>\n\n\n\n

\u5982\u679c\u5728\u7ebf\uff0c\u5c31\u663e\u793a”ip is up.”\uff0c\u5176\u4e2d\u7684IP\u8981\u6362\u4e3a\u771f\u6b63\u7684IP\u5730\u5740\uff0c\u4e14\u4ee5\u7eff\u8272\u663e\u793a\uff1b<\/p>\n\n\n\n

\u5982\u679c\u4e0d\u5728\u7ebf\uff0c\u5c31\u663e\u793a”ip is down.”\uff0c\u5176\u4e2d\u7684IP\u8981\u6362\u4e3a\u771f\u6b63\u7684IP\u5730\u5740\uff0c\u4e14\u4ee5\u7ea2\u8272\u663e\u793a\uff1b<\/p>\n\n\n\n

\u8981\u6c42\uff1a\u5206\u522b\u4f7f\u7528while\uff0cuntil\u548cfor(\u4e24\u79cd\u5f62\u5f0f)\u5faa\u73af\u5b9e\u73b0\u3002<\/p>\n\n\n\n

ping<\/p>\n\n\n\n

-c<\/p>\n\n\n\n

-W<\/p>\n\n\n\n

\u5199\u4e00\u4e2a\u811a\u672c(\u524d\u63d0\uff1a\u8bf7\u4e3a\u865a\u62df\u673a\u65b0\u589e\u4e00\u5757\u786c\u76d8\uff0c\u5047\u8bbe\u5b83\u4e3a\/dev\/sdb)\uff0c\u4e3a\u6307\u5b9a\u7684\u786c\u76d8\u521b\u5efa\u5206\u533a\uff1a<\/p>\n\n\n\n

1\u3001\u5217\u51fa\u5f53\u524d\u7cfb\u7edf\u4e0a\u6240\u6709\u7684\u78c1\u76d8\uff0c\u8ba9\u7528\u6237\u9009\u62e9\uff0c\u5982\u679c\u9009\u62e9quit\u5219\u9000\u51fa\u811a\u672c\uff1b\u5982\u679c\u7528\u6237\u9009\u62e9\u9519\u8bef\uff0c\u5c31\u8ba9\u7528\u6237\u91cd\u65b0\u9009\u62e9\uff1b<\/p>\n\n\n\n

2\u3001\u5f53\u7528\u6237\u9009\u62e9\u540e\uff0c\u63d0\u9192\u7528\u6237\u786e\u8ba4\u63a5\u4e0b\u6765\u7684\u64cd\u4f5c\u53ef\u80fd\u4f1a\u635f\u574f\u6570\u636e\uff0c\u5e76\u8bf7\u7528\u6237\u786e\u8ba4\uff1b\u5982\u679c\u7528\u6237\u9009\u62e9y\u5c31\u7ee7\u7eed\uff0cn\u5c31\u9000\u51fa\uff1b\u5426\u5219\uff0c\u8ba9\u7528\u6237\u91cd\u65b0\u9009\u62e9\uff1b<\/p>\n\n\n\n

3\u3001\u62b9\u9664\u90a3\u5757\u786c\u76d8\u4e0a\u7684\u6240\u6709\u5206\u533a(\u63d0\u793a\uff0c\u62b9\u9664\u6240\u6709\u5206\u533a\u540e\u6267\u884csync\u547d\u4ee4\uff0c\u5e76\u8ba9\u811a\u672c\u7761\u77203\u79d2\u949f\u540e\u518d\u5206\u533a)\uff1b\u5e76\u4e3a\u5176\u521b\u5efa\u4e09\u4e2a\u4e3b\u5206\u533a\uff0c\u7b2c\u4e00\u4e2a\u4e3a20M\uff0c\u7b2c\u4e8c\u4e2a\u4e3a512M, \u7b2c\u4e09\u4e2a\u4e3a128M\uff0c\u4e14\u7b2c\u4e09\u4e2a\u4e3aswap\u5206\u533a\u7c7b\u578b\uff1b(\u63d0\u793a\uff1a\u5c06\u5206\u533a\u547d\u4ee4\u901a\u8fc7echo\u4f20\u9001\u7ed9fdisk\u5373\u53ef\u5b9e\u73b0)<\/p>\n\n\n\n

fdisk -l |grep “<\/p>\n\n\n\n

dd if=\/dev\/zero of=\/dev\/sdb bs=512 count=1<\/p>\n\n\n\n

sync<\/p>\n\n\n\n

sleep 3<\/p>\n\n\n\n

RAID<\/p>\n\n\n\n

LVM\uff1a<\/p>\n\n\n\n

\u903b\u8f91\u5377\u7684\u7f29\u51cf<\/p>\n\n\n\n

\u6269\u5c55<\/p>\n\n\n\n

\u5feb\u7167\u5377<\/p>\n\n\n\n

while CONDITION; do<\/p>\n\n\n\n

  \u5faa\u73af\u4f53<\/p>\n\n\n\n

done<\/p>\n\n\n\n

while [ $VAR != ‘quit’ ];do <\/p>\n\n\n\n

done<\/p>\n","protected":false},"excerpt":{"rendered":"

28.1 LVM Logical Volume Manager,Version: 2 28.1.1 DM\u548cMD […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-753","post","type-post","status-publish","format-standard","hentry","category-linux"],"aioseo_notices":[],"views":198,"_links":{"self":[{"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/posts\/753","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=753"}],"version-history":[{"count":1,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/posts\/753\/revisions"}],"predecessor-version":[{"id":767,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=\/wp\/v2\/posts\/753\/revisions\/767"}],"wp:attachment":[{"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=753"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=753"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oceansource.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=753"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}