教你怎么在linux中調整分區大小

#?設置home分區大小為200G，釋放300G空間  $?lvreduce?-L?200G?/dev/centos/home    #?將空閑空間擴展到root分區  $?lvextend?-l?+100%FREE?/dev/centos/root    #?使用XFS文件系統自帶的命令集增加分區空間  $?xfs_growfs?/dev/mapper/centos-root

$?df?-h  Filesystem????????Size?Used?Avail?Use%?Mounted?on  /dev/mapper/centos-root??50G??50G??19M?100%?/  devtmpfs?????????32G???0??32G??0%?/dev  tmpfs???????????32G???0??32G??0%?/dev/shm  tmpfs???????????32G?2.5G??29G??8%?/run  tmpfs???????????32G???0??32G??0%?/sys/fs/cgroup  /dev/mapper/centos-home?476G??33M?476G??1%?/home  /dev/sda1????????497M?238M?259M?48%?/boot  tmpfs??????????6.3G???0?6.3G??0%?/run/user/0

$?lvdisplay  ---?Logical?volume?---  LV?Path????????/dev/centos/home  LV?Name????????home  VG?Name????????centos  LV?UUID????????1fAt1E-bQsa-1HXR-MCE2-5VZ1-xzBz-iI1SLv  LV?Write?Access????read/write  LV?Creation?host,?time?localhost,?2016-10-26?17:23:47?+0800  LV?Status???????available  #?open?????????0  LV?Size????????475.70?GiB  Current?LE???????121778  Segments????????1  Allocation???????inherit  Read?ahead?sectors???auto  -?currently?set?to???256  Block?device??????253:2    ---?Logical?volume?---  LV?Path????????/dev/centos/root  LV?Name????????root  VG?Name????????centos  LV?UUID????????lD64zY-yc3Z-SZaB-dAjK-03YM-2gM8-pfj4oo  LV?Write?Access????read/write  LV?Creation?host,?time?localhost,?2016-10-26?17:23:48?+0800  LV?Status???????available  #?open?????????1  LV?Size????????50.00?GiB  Current?LE???????12800  Segments????????1  Allocation???????inherit  Read?ahead?sectors???auto  -?currently?set?to???256  Block?device??????253:0

#?釋放?/dev/centos/home?分區?300G?的空間  #?命令設置?/dev/centos/home?分區?200G空間  $?lvreduce?-L?200G?/dev/centos/home  WARNING:?Reducing?active?logical?volume?to?200.00?GiB.  ?THIS?MAY?DESTROY?YOUR?DATA?(filesystem?etc.)  Do?you?really?want?to?reduce?centos/home??[y/n]:?y  ?Size?of?logical?volume?centos/home?changed?from?475.70?GiB?(121778?extents)?to?200.00?GiB?(51200?extents).  ?Logical?volume?centos/home?successfully?resized.

$?lvextend?-l?+100%FREE?/dev/centos/root  Size?of?logical?volume?centos/root?changed?from?50.06?GiB?(12816?extents)?to?325.76?GiB?(83394?extents).  Logical?volume?centos/root?successfully?resized.

$?xfs_growfs?/dev/mapper/centos-root  meta-data=/dev/mapper/centos-root?isize=256??agcount=4,?agsize=3276800?blks  ?????=????????????sectsz=512??attr=2,?projid32bit=1  ?????=????????????crc=0????finobt=0?spinodes=0  data???=????????????bsize=4096??blocks=13107200,?imaxpct=25  ?????=????????????sunit=0???swidth=0?blks  naming??=version?2???????bsize=4096??ascii-ci=0?ftype=0  log???=internal????????bsize=4096??blocks=6400,?version=2  ?????=????????????sectsz=512??sunit=0?blks,?lazy-count=1  realtime?=none??????????extsz=4096??blocks=0,?rtextents=0  data?blocks?changed?from?13107200?to?85395456