PVS ------------------------------------ To the number of PV

VGS ------------------------------------ To know number of VG available

LVS --------------------------------------- To know number of LG available

pvcreate -v /dev/sdb ------------------------------------- To create a PV

pvdisplay /dev/sdb ------------------------------------ To know number of PV available

pvcreate /dev/sdb ------------------------------------- To create a PV where /dev/sdb is the name of the harddisk

vgcreate volumevontainer /dev/sdb /dev/sdc ----------- To create VG with name volume container and using harddisk (/dev/sdb & /dev/sdc)

vgextend volumevontainer /dev/sdd ------------------ To extend hardisk in vg group

lvcreate -L 12G -n mylv vokumecontainer ----------- To create a LV

ext4 /dev/volumecontainer/mylv ------------------ To format and make file system

mkdir /lv1 ================== To mount

extend -L +3G -n /dev/volumecontainer ----------------------- To extend the volume by 3gb

resize2fs /dev/volumecontainer/mylv --------------------- Resize the volume