Pain points

Before, I had a random whole on the virtual machine centos System , Allocated a relatively small space and found that the hard disk was not enough , Ready to add more .

solve

  Double click the hard disk perhaps Click Edit virtual machine settings .

In the dialog box Click hard disk , Point extension .

Set how much space you need to prepare , I'm here from 40 Rise to 45, Then click expand .

  Then turn on the virtual machine , Use df -h see , It turns out that nothing has changed , still 40G

 df command   Used to display the available disk space on the partition . The default display unit is KB. You can use this command to get the space occupied by the hard disk , How much space and other information is left .

-h or --human-readable： Display information in a more readable way ;

Use fdisk -l Check the new disk partition

 fdisk command   Used to observe the use of hard disk entities , You can also partition the hard disk . It uses a traditional question and answer interface , Not like DOS fdisk Of cfdisk Interactive operation interface , Therefore, it is inconvenient to use , But the function is not discounted at all .

fdisk [ Options ] -l < disk > List partition table

fdisk [ Options ] < disk >     Change partition table

  You can see that there are three partitions sda1、sda2、sda3

We use  fdisk /dev/sda Partition the newly added disk , You can enter m See how to use

  We type in n Add a new partition

Then input p

Then keep walking by default , Until there is ： Partition 4 Set to Linux type , The size is set to 5 GiB

next , We type in w, Enter exit .

We type in fdisk -l Then you can see that the partition has been created successfully

Restart the virtual machine ：reboot

Then check the disk volume group name ：vgdisplay. You can see the name is centos

  Initialize partition ：pvcreate /dev/sda4

Add the initialized partition to the virtual volume group ：vgextend centos /dev/sda4

Input again vgdisplay You can see that there is room left

  Next , We allocate the spare disk to the file system that needs to be expanded ., We use df -h, We're going to expand /dev/mapper/centos-root

  Then input lvextend -L +5G /dev/mapper/centos-root enter , Expand the existing volume group capacity . If you fail , Please reduce the value and try again , Only numbers lower than your preset value can be extended .

You also need to expand the file system .

  My system instructions are ：xfs_growfs /dev/mapper/centos-root. Different systems have different instructions , You need to check this by yourself （ Input cat /etc/fstab |grep centos-root enter , View the format of the file system , My is xfs）

  thus , Have succeeded

  Reference resources

VMware Expand disk space _ Little programmer roast's blog -CSDN Blog _vmware Expansion disk