The format of the ZERO command is:

   ZERO component [COUNTERS]

Component types are:

   EXECUTOR
   LINE
   NODE
   SYSTEM

For more help use:

   HELP component-type
   HELP ZERO component-type
2 EXECUTOR
Use the ZERO EXECUTOR command to zero the node counters kept by the executor
relative to itself.  The format is:

   ZERO EXECUTOR

For more help use:

   HELP EXECUTOR
2 LINE
Use the ZERO LINE command to zero line counters.  The formats are:

   ZERO LINE line-id
   ZERO KNOWN LINES

For more help use:

   HELP LINE
2 NODE
Use the ZERO NODE command to zero node counters kept by the executor relative
to itself or other nodes.  The formats are:

   ZERO NODE node-id
   ZERO KNOWN NODES

For more help use:

   HELP NODE
2 SYSTEM
Use the ZERO SYSTEM command to zero the DECnet system counters.
The format is:

   ZERO SYSTEM

For more help use:

   HELP SYSTEM