lvm: Add space && create new lvm

# add a specific size to lv.

vgdisplay
lvextend -L +50G /dev/mapper/vg0-home
resize2fs /dev/mapper/vg0-home

# create a new lv

sudo pvcreate /dev/sdb1
sudo pvdisplay
sudo vgcreate vg-data /dev/sdb1
sudo vgs
sudo lvcreate --name lv-data -l 100%FREE vg-data
sudo mkfs.xfs /dev/vg-data/lv-data

sudo vim /etc/fstab
sudo mount -a


sudo xfs_growfs /dev/vg-data/lv-data
sudo resize2fs /dev/vg-data/lv-data