Recreate swap and resize root partition

I'm using Ubuntu 22.04.2 LTS. Below is my current partition table configuration. Initially, I allocated 37GB for the root partition and left the remaining space for the home partition. However, I have realized that the root partition requires more space nowadays.

One mistake I made was not creating an extended partition, which complicates the resizing process. My plan now is to shrink the home partition and use that space to extend the root partition. However, the swap partition is located in between, posing a challenge.

To address this, I intend to follow these steps:

1. Disable the swap partition using the swapoff command and remove it from the operating system.
2. Boot the system using a live USB so partitions aren't used and I can alter them.
3. Delete the sda3 partition using gparted
4. Utilize gparted to shrink and move the home partition (sda4).
5. Extend the root partition using the freed space.
6. Create a new swap partition.
7. Reboot into the operating system and activate the new swap partition using the swapon command.

While this plan seems viable, I would appreciate any advice or alternative approaches that could help ensure a smooth and error-free process. Thank you.

P.S The reason I used a seperate home partition is to reinstall OS in case of a catastrophy but to keep the user data safe but in this point I really would like to avoid that and just make space in the root partition.

In your case you can extend root partition by follow this steps:

1. disable swap partition and delete its line from ets/fstab
   
   

2. reboot by live USB, copy your username folder in home partition to home folder in ubuntu root partition.
   

3. now you can delete swap and home partition, and resize the root partition as you like.
   

4. if you want to continue without separate home partition you can disable home partition by deleting its line from etc/fstab, delete this line:
   # /home was on /dev/sdax during installation UUID=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx /home ext4 defaults 0 2 you will see numbers or letters instead of x. save the fstab file.
   apply this command after login to ubuntu and change the directory to home by cd /home to chang the ownership of your user folder: sudo chown -R username ./username replace username by your user name
   

5. if you want to back to separate home partition, don't delete its line from etc/fstab, restore your user folder to home partition and adjust its uuid in etc/fstab by the new uuid which you can get it from disks utility.