I updated my VPS with more memory and disk space. This is what I had to do, to use all the space on a bigger hard drive with a LVM partition.

To see the current disk usage

# df -h

To see the current partitioning

# fdisk -l

Create a new partition

# fdisk /dev/sda (Created a new 3rd partition)

List all the partitions

# fdisk -l

View current physical volumes a.k.a. pv

# pvdisplay

Allow Linux OS to use the new partition in LVM

# pvcreate /dev/sda3

See the new pv /dev/sda3

# pvdisplay

View the current volume groups

# vgdisplay

Add the new PV /dev/sda3 to the existing VG vg_centos64

# vgextend vg_centos64 /dev/sda3

# vgdisplay

View the current LV

# lvdisplay

Now make the LV larger

# lvextend -l +2559 /dev/vg_centos64/lv_root

or

# lvextend -l +100%FREE /dev/vg_centos64/lv_root

Now you can see the larger size of the LV

# lvdisplay

Online resize of the actual filesystem now on that LV

# resize2fs /dev/vg_centos64/lv_root

# reboot

You can see the new size now.

# df -h

Reference:

See reference below for more information.

http://geekswing.com/geek/unix/extending-a-linux-disk-with-lvm-extending-root-partition/