In RHEL<=8 executing "w" w/o any option will show the "FROM" column.

In RHEL9 the default has changed and you need "–from" to get the "FROM" column.

8: https://git.centos.org/rpms/procps-ng/blob/c8/f/SPECS/procps-ng.spec has "--enable-w-from "

9: https://git.centos.org/rpms/procps-ng/blob/c9/f/SPECS/procps-ng.spec has "--disable-w-from"

This bug is to get confirmation from you that this is intentional and won't be changed back in the future, so that we can adapts our scripts w/o fear of this changing again.

Also:

"w --from --ip-addr": will show FROM with IP addresses

"w --ip-addr --from" won't show FROM at all, very confusing.