Create LVM on Debian 7

apt-get install lvm2

etc/init.d/lvm start

pvcreate /dev/sda

vgcreate myVirtualGroup1 /dev/sda

vgdisplay

Create a logical volume in a volume group:

lvcreate -n myLogicalVolume1 -L 10g myVirtualGroup1
lvdisplay

Format the logical volume to the filesystem you want (ext4,xfs…):

mkfs -t ext4 /dev/myVirtualGroup1/myLogicalVolume1''

You can test to see if it's working:

mkdir /test
mount /dev/myVirtualGroup1/myLogicalVolume1 /test

df -h

Expand entire logical volume to whole disk (/dev/sdX):

pvcreate /dev/sdX

vgextend myVirtualGroup1 /dev/sdX
lvextend -l +100%FREE /dev/myVirtualGroup1/myLogicalVolume1

resize2fs /dev/myVirtualGroup1/myLogicalVolume1

Tested on