Error making swap space with mkswap [duplicate]

I am running VM Workstation 12 Player and have installed Ubuntu 16.10 on the VM. I have made an extended partition for the swap space after having had to remove the swap partition in order to extend the primary partition space.

I enter

fdisk -l

and get

Disk /dev/sda: 80 GiB, 85899345920 bytes, 167772160 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
Disklabel type: dos
Disk identifier: 0x7d4da0a8

Device     Boot     Start       End   Sectors  Size Id Type
/dev/sda1  *         2048 157700095 157698048 75.2G 83 Linux
/dev/sda2       157700096 159793151   2093056 1022M  5 Extended

Yet, when I type

sudo mkswap /dev/sda2

I get

mkswap: error: swap area needs to be at least 40 KiB

It seems that I have just over 1 GB of space on /dev/sda2

Solution 1:

the extended partition isn't a true partition, it is a container for logical drives.

You need to create a logical drive within the extended partition that uses all space.

then use that for the swap partition

Alternatively:

Since you only have two partitions, delete the extended partition.
Then, create a primary partition to use for swap

Solution 2:

Your /dev/sda2 is an extended partition which acts as a kind of container to hold further logical partitions which can be used. The extended partition cannot be used directly.

So either partition /dev/sda2 as a primary partition or create a logical partition within the extended partition.