Console operation:
1. Backup disk
2. Expand the disk
3. Restart the server
Login Shell operation:
> umount /dev/vdb1 > fdisk /dev/vdb > d > n > [Enter] > [Enter] > [Enter] > wq > df -h > umount /dev/vdb1 > e2fsck -f /dev/vdb1 > resize2fs /dev/vdb1