NorduGrid ARC has used the name arcstat since release 1.0. It has been in Debian since January 2010 (source package nordugrid-arc-nox, later renamed nordugrid-arc in May 2011).
The command is part of a set of commands, all using the arc prefix: arccat arcget arckill arcproxy arcresume arcsync arcclean arcls arcrename arcrm arctest arccp arched arcmkdir arcrenew arcstat arcctl arcinfo arcplugin arcresub arcsub Mattias Ellert
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