To completely remove all partitions and data from a disk and create an empty disk in Linux, you can use the fdisk utility. Here is the general process:
Identify the disk that you want to erase. You can use the lsblk command to list all available disks and their corresponding device names.
Run the fdisk utility with the name of the disk as an argument. For example: sudo fdisk /dev/sda
Inside the fdisk utility, use the p command to print the current partition table. This will show you the current partitions on the disk.
Use the d command to delete each partition. When prompted, enter the number of the partition that you want to delete. Repeat this step for each partition on the disk.
When all partitions have been deleted, use the w command to write the changes to the disk and exit fdisk.
Run the partprobe command to update the system's partition table. This step is necessary to ensure that the system recognizes the changes that you made to the disk.
Use the lsblk command to verify that the disk is now empty and does not contain any partitions.
Keep in mind that this process will completely erase all data on the disk, so make sure to back up any important files before proceeding.