How to resize partitions on a pre-installed Ubuntu system?

To reinstall Ubuntu system with partitions, you can follow these steps:

1. Firstly, you need to use GParted or another partition editing tool. If GParted is not pre-installed on your Ubuntu system, you can install it using the following command in the command line:
2. Please install gparted using the following command: sudo apt-get install gparted
3. Open GParted (or another partition editing tool), enter the administrator password to authorize access.
4. In the partition editor, select the disk you want to repartition (usually /dev/sda).
5. For a disk that needs to be repartitioned, right-click on the partition and select the “Resize/Move” option.
6. In the pop-up dialog box, adjust the size and position of the partition. You can drag the edges to resize the partition or enter a new size in the corresponding text box.
7. After confirming the partition adjustments, click on the “Resize/Move” button to apply the changes.
8. Repeat steps 4-6 to make adjustments to the other partitions.
9. After you have finished all the partition adjustments, click the “Apply” button to apply all changes.
10. Please wait for the partition adjustment to be completed. This may take some time, depending on the size of your disk and system load.
11. After the partition adjustment is completed, you can close the partition editor and restart the system.

Please make sure to back up your important data before repartitioning. It is crucial to ensure that your data is already backed up as there is a risk of data loss during the repartitioning process.

In addition, resizing partitions also requires a certain level of technical expertise. If you are not familiar with this process, it is recommended to seek help from an experienced professional to avoid any unexpected mishaps.