1. Modify the size of the hard disk
Close the virtual machine→Settings→Hard Disk→Modify to the disk size you need
2. View the current disk usage statistics of the root directory
df -h
Note: Although the new disk size has been set to 50G in step 1, it can be clearly seen here that the total disk size is still the previous 20G, which involves partitioning issues.
3. Modify the partition and allocate disk space to the root directory
1. View the disk partition table
You can see that the real disk size of the host is about 50G set before
fdisk -l
2. Create a partition
3. View the disk partition table again
4. Receive new partition table information
[root@test-1 ~]# partprobe 5. Format the partition as ext4
mkfs.ext4 /dev/sda3
5. View volume group name
vgdisplay
6. Create a new physical volume
pvcreate /dev/sda3
7. Expand to volume group
vgextend centos /dev/sda3
8. View the root partition
lvdisplay
9. Expand to capacity logical partition
lvextend /dev/centos/root /dev/sda3
10. Refresh the logical partition
resize2fs /dev/centos/root
11. If an error is reported, check whether the file system is xfs
cat /etc/fstab
12. If so, use this command
xfs_growfs /dev/centos/root
13. View the root directory
df -h
At this time, it has become 47G, restart the virtual machine to take effect.