Operating systems, such as Linux, provides partitioning software to resize partitions without any data loss. It’s possible to resize a partition using Gparted in an easy and a convenient way. Gparted partitioning software is available for free download. To modify the partition with Gparted, it has to be downloaded and then burned into a blank CD. This CD will be used as a bootable CD in order to resize the partition on Linux. Follow these easy instructions to resize a partition using Gparted on Linux without losing any data. The process may take some time to complete.
So, If you have a partition and you want to enlarge or reduce it without losing data you might find Gparted does what you want.
Download InfraRecorder, a program to burn the ISO image of GParted on a blank CD.
Restart the computer introducing the CD into the drive (please make sure that your BIOS is properly configured to boot from CD-ROM: change the boot sequence BIOS)
When prompted, choose ignore the boot options unless you want to declare a specific device:
Click to repartition the disk (/dev/hda1 is usually the first IDE drive, /dev/hda2 for the second. /Dev/sda1 is the first SCSI or Serial-ATA, /dev/sda2 in the second, etc.)
Then click "Apply."
Warning: After this stage, it will be impossible to undo.
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