Comment (by Roland Haas):

The missing ^ has been added to master in git hash 2207d60b "Frontera: add missing beginning of string anchor to alias pattern" of simfactory2 and ET_2021_05 in git hash 88a28cf6 "Frontera: add missing beginning of string anchor to alias pattern" of simfactory2 .

Cursory testing indicates that for Stampede2 one can use the FQDN for the alias pattern. I have no access to Frontera but expect the same to be true there as well (same computing center, same pattern of names). On BlueWaters on the other hand even hostname -f just returns h2ologin[1234] so the domain name of the alias pattern should be removed since it is never use (but the hostnames alone are already sufficiently unique).

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2574/alias-patterns-for-bluewaters-and-frontera