Create a New Partition in Linux

In most Linux systems, you can use the fdisk utility to create a new partition and perform other disk management operations.

Note: To perform disk management operations using fdisk , you must have the root privileges.

As a tool with a text interface, fdisk requires typing the commands in the fdisk command line. The main fdisk commands are listed below:

To create a new partition:

1. Start a terminal.
2. Start fdisk :

   # /sbin/fdisk /dev/hda

   /dev/hda stands for the hard drive you want to partition.

3. In fdisk , to create a new partition, type the following command:

   n

   • When prompted to specify the Partition type , type p to create a primary partition or e to create an extended one. There may be up to four primary partitions. If you want to create more than four partitions, extend the last partition, and it will become a container for other logical partitions.
   • When prompted for the Number , in most cases, type 3 because a typical Linux virtual machine has two partitions by default.
   • When prompted for the Start cylinder , type a starting cylinder number or press Return to use the first cylinder available.
   • When prompted for the Last cylinder , press Return to allocate all the available space or specify the size of a new partition in cylinders if you do not want to use all the available space.

   By default, fdisk creates a partition with a System ID of 83 . If you are unsure of the partition’s System ID , use the

   l

   command to check it.

4. Use the

   w

   command to write the changes to the partition table.

5. Restart the virtual machine:

   reboot

6. When restarted, create a file system on the new partition. We recommend that you use the same file system as on your other partitions. In most cases it will be either the ext3 or ReiserFS file system. For example, to create the ext3 file system, run the following command:

   /sbin/mkfs -t ext3 /dev/hda3

7. Create a directory that will be a mount point for the new partition. For example, to create a new directory and assign the name data to it, enter:

   mkdir /data

8. Mount the new partition to the directory you have just created:

   mount /dev/hda3 /data

9. Edit the /etc/fstab file to specify the information on the new partition. For example, you can add the following string to this file:

   /dev/hda3 /data ext3 defaults 0 0

   In this string, /dev/hda3 is the partition you have just created, /data is a mount point for the new partition, ext3 is the file type of the new partition. For the exact meaning of other items in this string, consult the Linux documentation for the mount and fstab commands.