I am new to Ubuntu.
I want to know how to re-partition my hard disk after installation.
I had used the gnome-disks application during install,
but now the HDD can't be unmounted as it contains the OS.
How can I revise the partition?
P.S I have tried gparted but it didn't work


First, you might use your Ubuntu live CD/USB to make partitions changes on your bootable hard drive. You can make a number of online operations (I mean during you are on your system), but be sure to:

  • Always umount partitions before formatting or deleting them.
  • If you change hard drive layout (e.g. deleting partition) always prefer rebooting in order to allow a proper partition refresh in memory.

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