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Description of problem:

See https://bugzilla.redhat.com/show_bug.cgi?id=1448225#c22

Now login provides -H command line option to suppress hostname in the login prompt. Unfortunately, it's useless in some case (for example telnetd does not provide a way how to modify login(1) command line). 

For RHEL6.10 (and RHEL.9.Z) and upstream tree have been implemented a new /etc/login.defs option LOGIN_PLAIN_PROMPT to suppress the hostname.

It would be nice to have this feature also in RHEL7 to make it easy to upgrade from RHEL6 to RHEL7.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0936