Testing cv modules from the command line
cvm-testclient CVM account domain [ credential [ credential ... ] ]
cvm-testclient will invoke the named CV module and provide a verbose report of the results, including details on the standard facts reported by the module.
cvm-pwfile(8), cvm-qmail(8), cvm-unix(8), cvm-sql(8), cvm-vmailmgr(8), cvm-benchclient(8), cvm-checkpassword(8),
http://untroubled.org/cvm/cvm.html