What happened to `fsused` and `fssize` in `lsblk`?

Why are these columns (fsused and fssize) not available in lsblk?

On my Manjaro system I can see that:

$ lsblk -o name,mountpoint,label,fsused,fssize,size,fstype,uuid
NAME MOUNTPOINT LABEL FSUSED FSSIZE SIZE FSTYPE UUID
loop0 /var/lib/s 146,8M 146,8M 146,8M squash
loop1 /var/lib/s 98M 98M 97,9M squash
...
$ lsblk --version
lsblk from util-linux 2.36.1

works just fine. However on my Xubuntu 18.04.5 LTS (Bionic Beaver) this is somehow not the case (anymore?):

$ lsblk -o name,mountpoint,label,fsused,fssize,size,fstype,uuid
lsblk: unknown column: fsused,fssize,size,fstype,uuid
$ lsblk --version
lsblk from util-linux 2.31.1

1 Answer

The answer to your question is contained in package version.

This functionality was introduced in util-linux 2.33.

This means that versions prior Ubuntu 20.04 LTS do not have the FSAVAIL,FSSIZE,FSUSED,FSUSE% flags.