The steps below is taken from : Extending partitions on Linux VMware virtual machines | TechRepublic . To view the pictures mentioned in the step, please go to the site, i have modified the step from that site, as some steps were not clearly explained and missing:
I appreciate this article was written a long time ago but some of the steps appear to need updating.
In step 25 i did not see the Volume Group name with df. Instead i found a command called vgdisplay which showed it was called 'turnkey' in my case.
I would suggest seperating the two commands in step into two different numbered actions. i.e.
25a Run vgdisplay and note Volume Group name
25b vgextend <Volume Group name> <Partition name> eg. vgextend turnkey /dev/sda3
Also in step 26 it is not clear how you found the VolGroup name. What i did was ls /dev/mapper/turnkey* (i.e. the Volume Group) and found there was a /dev/mapper/turnkey-root and /dev/mapper/turnkey-swap_1. I used the turnkey-root at it worked