[TriLUG] Modify LVM

[MvER - TrLUG via TriLUG]

Below is some data on my 750 GB disk, holding ubuntu 14.04, my /home
folder, etc.
The LVM GUI  tool shows unmounted /dev/sda2 with 698.40 GB, which I tend
not to believe, in my ignorance.

Anyhow, what I want to do is to expand /dev/sda5 to use 239.5 GB
currently listed as free space in ubuntu-vg.

I've been reading:
http://www.howtogeek.com/howto/40702/how-to-manage-and-use-lvm-logical-volume-management-in-ubuntu/
and others, but am really fearful of working on the live disk with lots 
of needed files in case I do it wrong with the various create and extend
commands.

I can supply output from sudo fdisk, etc upon request.

Anyone up for providing guidance?


mver at mver-RV415-RV515:~$ sudo df

Filesystem                       1K-blocks     Used Available Use%
Mounted on
udev                               4012060       12   4012048   1% /dev
tmpfs                               804444     1572    802872   1% /run
/dev/mapper/ubuntu--vg-root       26704124 11114816  14209780  44% /
none                                     4        0         4   0%
/sys/fs/cgroup
none                                  5120        0      5120   0% /run/lock
none                               4022208      540   4021668   1% /run/shm
none                                102400       64    102336   1% /run/user
/dev/sda1                           240972   186388     42143  82% /boot
/dev/mapper/ubuntu--vg-home       25671996 21556176   4073224  85% /home
/dev/mapper/ubuntu--vg-docs      103081248 45715688  57244320  45%
/home/mver/docs
/dev/mapper/ubuntu--vg-tbird      25671996   601800  25027600   3%
/home/mver/.thunderbird
/dev/mapper/ubuntu--vg-winsamdta  25671996 18480568   7148832  73%
/home/mver/winsamdta