How to shrink /home and extend /root partitions

Question

I want to shrink my /home to about 15G, and then extend my / to fill up that remaining space.

How can I do this?

In GParted, I can't seem to shrink /home because there is no free space after it I assume

The same goes for extending /

You cannot modify a mounted partition. Boot from a LiveUSB instead. — user535733, Mar 13 '20 at 18:11
I'm aware of that, I just wasn't sure which commands I had to use. The gparted was just to show a visual in case it would be helpful — K Split X, Mar 13 '20 at 18:17
Not really, its quite outdated, there seems to be alot of confusion in the comments, and the instructions are very minimal — K Split X, Mar 13 '20 at 18:38
The very first answer on that duplicate is very good, and not at all outdated. Try it. — user535733, Mar 13 '20 at 19:02
Please see my answer. If it solves your problem, please remember to accept it by clicking on the checkmark icon that appears to the left of my answer. Thanks! — heynnema, Mar 13 '20 at 21:17

score 1 · Accepted Answer · edited Jun 12 '20 at 14:37

Note: You really need a larger HDD/SSD

Make sure that you have a good backup of your important Ubuntu files, as this procedure can corrupt or lose data.

Keep these things in mind:

always start the entire procedure with issuing a swapoff on any mounted swap partitions, and end the entire procedure with issuing a swapon on that same swap partition
a move is done by pointing the mouse pointer at the center of a partition and dragging it left/right with the hand cursor
a resize is done by dragging the left/right side of a partition to the left/right with the directional arrow cursor
if any partition can't be moved/resized graphically, you may have to manually enter the specific required numeric data (don't do this unless I instruct you to)
you begin any move/resize by right-clicking on the partition in the lower pane of the main window, and selecting the desired action from the popup menu, then finishing that action in the new move/resize window

Do the following...

Note: if the procedure doesn't work exactly as I outline, STOP immediately and DO NOT continue.

boot to a Ubuntu Live DVD/USB
start gparted
resize the right side of /dev/nvme0n1p7 (home) and reduce that partition by 5-10G
move the /dev/nvme0n1p7 (home) partition all the way right
move the /dev/nvme0n1p6 (swap) partition all the way right
resize the right side of /dev/nvme0n1p5 (/) all the way right
click the Apply icon

Update, it worked fine, Thank you – K Split X Mar 14 '20 at 14:18 — K Split X, Mar 14 '20 at 14:18
@KSplitX Good news! Thanks! – heynnema Mar 14 '20 at 14:31 — heynnema, Mar 14 '20 at 14:31