How to use the command 'addpart' (with examples)

The command ‘addpart’ is used to tell the Linux kernel about the existence of a specified partition. It is a simple wrapper around the ‘add partition’ ioctl. This command is helpful when you need to inform the Linux kernel about the presence of a new partition.

Use case 1: Tell the kernel about the existence of the specified partition

Code:

addpart /dev/sdb 1 0 100M

Motivation: The motivation for using this command is to inform the Linux kernel about the existence of a new partition on the ‘/dev/sdb’ device.

Explanation:

• addpart is the command used to add a partition.
• /dev/sdb is the device on which the partition needs to be added.
• 1 is the partition number.
• 0 is the starting sector of the partition.
• 100M is the length of the partition in megabytes.

Example Output:

Adding partition 1 to /dev/sdb... Done!

In the above example, we use the ‘addpart’ command to add partition number 1 to the ‘/dev/sdb’ device, starting from sector 0 and with a length of 100 megabytes. The command successfully informs the kernel about the existence of the specified partition.

Conclusion:

The ‘addpart’ command is a straightforward way to inform the Linux kernel about the existence of a partition. By using this command, you can easily add partitions to devices and ensure that the kernel is aware of the new partitions.