After making partition, I couldn't see device (/dev/sda3)

Question

I made a partiion sda3 using fdisk, but after that, I don't see /dev/sda3.

If I fdisk -l, I see this.

test@jylenovo:~$ sudo fdisk  -l

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000ded3d

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048   292968447   146483200   83  Linux
/dev/sda2       945522686   976771071    15624193    5  Extended
/dev/sda3       292968448   800000000   253515776+  83  Linux
/dev/sda5       945522688   976771071    15624192   82  Linux swap / Solaris

Partition table entries are not in disk order

But, I don't see /dev/sda3 like this.

test@jylenovo:~$ ls /dev/sda3 -l
ls: cannot access /dev/sda3: No such file or directory

What am I missing?

Solution

The linux kernel has not been informed you've created the partition.

Your can reboot, or use the partprobe command:

sudo partprobe

You don't even need to specify the disk argument. It will test all your drives for new partitions. See man partprobe

The partprobe command is in the parted package.