How can disk space be reallocated in Linux?

To reallocate disk space, you can follow these steps:

1. First, open the terminal window and login to the Linux system as an administrator.
2. Use the command “fdisk -l” to display all disk and partition information on the system. Locate the disk you want to reallocate space on.
3. Run the command fdisk /dev/sdx, replacing “/dev/sdx” with the device name of the disk you want to reallocate space from. For example, if the disk you want to reallocate space from is /dev/sda, the command should be fdisk /dev/sda.
4. Use the command “p” to view a list of partitions on the disk. Take note of the starting sector and size of the partition you want to reallocate space to.
5. Use the “d” command to delete the partition for the purpose of reallocating space. Enter the partition number and press Enter to confirm the deletion.
6. Create a new partition using the n command. Choose the partition type (primary or logical) and input the starting sector and size.
7. Use the t command to specify the file system type for the partition. Input the partition number and choose the appropriate file system type.
8. Save and exit the fdisk tool using the w command.
9. Substitute “/dev/sdxN” with the device name of the new partition you created when using the “resize2fs /dev/sdxN” command. This command adjusts the file system size to match the new partition size.
10. Verify if the new partition space has been successfully reallocated using the “df -h” command.

Please note that reallocating disk space is a high-risk operation. Please backup important data before proceeding and ensure you have sufficient experience and understanding of basic concepts of the operating system.