pbs node manipulation Revision

It has been a long time since I used torque. I though I pen down some common commands I will used

• pbsnodes -l (List node names and their state. If no state is specified, only nodes in the DOWN, OFFLINE, or UNKNOWN states are listed. Specifying a state string acts as an output filter. Valid state strings are "active", "all", "busy", "down", "free", "offline", "unknown", and "up". )
  
• pbsnodes -o (Add the OFFLINE state. This is different from being marked DOWN. OFFLINE prevents new jobs from running on the specified nodes. This gives the administrator a tool to hold a node out of service without changing anything else. The OFFLINE state will never be set or cleared automatically by pbs_server; it is purely for the manager or operator.)
  
• pbsnodes -c (Clear OFFLINE from listed nodes)
  
• pbsnodes -a (All attributes of a node or all nodes are listed. This is the default if no flag is given)