Create partitions for unallocated regions in Ubuntu

When installing the system, GB of space is left unallocated. Now, I create a directory/data/node1 in Ubuntu and mount the 500G to this point. Is there any way for everyone to do this? I used cfdisk to create partitions for the unallocated GB space,/dev/sda10, and then fdisk-l can see the/dev/sda10 information, when fdisk/dev/sda10 is displayed, the device cannot be opened. I mount/dev/sda10

When installing the system, GB of space is left unallocated.

Now, I create a directory/data/node1 in Ubuntu and mount the 500G to this point. Is there any way for everyone to do this?

I used cfdisk to create partitions for the unallocated GB space,/dev/sda10, and then fdisk-l can see the/dev/sda10 information, when fdisk/dev/sda10 is displayed, it cannot be opened. When I mount/dev/sda10, it is displayed that the device does not exist, but it can be seen again when fdisk-l is used.

Test the correct answer:

You must restart the fdisk before it takes effect, or try to run sudo partprobe