use a form of mktemp that works on OSX and linux.
use a form of mktemp that works on OSX and linux.

Also check for cqlsh on path.

MastodonC/kixi.hecuba,MastodonC/kixi.hecuba,MastodonC/kixi.hecuba,MastodonC/kixi.hecuba,MastodonC/kixi.hecuba