composer update

Does not run due to low memory on a droplet with 2GB.

But swapon operation is not permitted here: “swapon: /swapfile: swapon failed: Operation not permitted”

Followed https://www.digitalocean.com/community/tutorials/how-to-add-swap-space-on-ubuntu-18-04 to no avail - cannot enable swap in the last step.

What else can I do to enable swap, even if temporarily?

Thanks!