lvextend -L +1G /dev/raman-vg/home -r
This website has all the information you need which explains LVM. In short: You create a partition from free space left on your disk, from that partition you create a physical volume(pv). Which you then add to your volume group(vg), after which you can extend your logical volume(lv).thanks, is there any web page to know about these . i have successfully increased volume