How to resize /home partition using /root partition or /linux-swap partition in Ubuntu

 Consider the case shown above, or if you are confused about memory allocations please read carefully each step

• Boot from USB/Live CD to Ubuntu/Gparted: Because you can't resize/move partitions while they are mounted currently, if you are thinking to do from Windows Disk Management for ext4(Ubuntu) partitions in case of dual boot then also not possible.
• Open gparted: sudo gparted
• From this point just be careful & it's more precaution required while you are using dual boot. Just remember or note down ext4(Linux) partitions that needs to be resized. Best way to remember is note-down size while you were logged in Ubuntu for each /home & /root partitions.
• Right-Click on / root partition to Resize/Move.
• Shrink size from bottom free option: Move right to left or Click <up> icon from last to your desired size you want to allocate to /home partition.
• Right-Click on /home partition Resize/Move: Expand to left or Click <up> icon from first to all size you shrinked from above /root partition.
• Click Ok on all times and finally, click on Tick icon to apply all changes. 
• If you want to use linux-swap partition. Right-Click SwapOff then Resize/Move in same way. Then Swapon again.

• About linux-swap: This memory will be used as RAM when you have limited resources. Read More: http://www.makeuseof.com/tag/swap-partition/ 
• Finally, all done safely! A lot more people say & recommend to backup entire disk in case but you can easily do this with some prior knowledge about what you are doing.

Feel free to comment for any queries!
Ref: https://askubuntu.com/questions/430956/how-to-resize-the-root-partition-using-gparted

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