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Given that the device is /dev/vda and the system partition (/) is at /dev/vda1, we run this commands:
growpart /dev/vda 1 resize2fs /dev/vda1
The code on LVM changes a bit
growpart /dev/vda 1 pvresize /dev/vda1 lvextend -l +100%FREE /dev/mapper/loquesea resize2fs /dev/mapper/loquesea