Shulou(Shulou.com)06/03 Report--

The original partition / data of the Linux system has data, and reinstall the system without formatting / data partition

Need to prepare a virtual machine with / data partition

Then load the ISO, start reloading and keep the / data partition, and load directly into the partition interface

Know from the beginning that the / data partition is 2048MB, so choose to keep this partition directly.

Then delete the other partitions and then re-partition

Then wait for the system to be reinstalled as usual, and after the system is reinstalled, go in and check / data partition file to prove that it has been successful.

Add a disk to the system and use LVM management to expand the existing volume group, enter the system, and view the partition df-h

You can see the two partitions that use LVM when installing the system: /, / var. Check the volume group name and volume group usage vgdisplay.

View the space status of the current logical volume, as shown in the following figure:

Now I feel that / var 8G is not enough. If I want to expand the capacity to 28G, insert a new 20g hard disk; check it with 'fdisk-1'.

Format partition operation 'fsdisk / dev/sdb'

Set the newly added disk to LVM mode

Confirm the partition

Create the newly added partition / dev/sdb1 as a physical volume

Expand the volume group centos. Extend physical volume / dev/sdb1 to centos

At this time, centos has 20g of free space, so extend / dev/sdb1 to / var.

At this time, although the 20g disk has been extended to / var but not written to the file system, enter / etc/fstab to confirm

Write to the file system to make its expansion effective

The above are the details of how to reinstall the linux system, please pay more attention to other related articles!

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