Use Quota in Ubuntu 16.04 in nromal way

Hello,

i was trying to setup quota for my ftp users on fresh Ubuntu 16.04 lunched droplet i was using this flow: https://www.digitalocean.com/community/tutorials/how-to-enable-user-and-group-quotas

but came to flowing error after running “quotaon /” i get:

quotaon: using //aquota.user on /dev/vda1 [/]: No such process quotaon: Quota format not supported in kernel.

i see here: https://www.digitalocean.com/community/questions/enable-quota-ubuntu-16-04-error similar question with answer of user who overwrites kernel

but i wondered if there is not present some alternative to “quotaon” ? as it is removed from kernel then there should be some normal alternative functionality to it ? or some other way to enable quotaon without re installation “linux-image-generic …” ?

Thanks, Armen