Problem: users other than root cannot run commands on remote nodes using the pssh command.

  
  $ pssh -n 0 date
  PSI: dospawn: spawn to node 0 failed: Permission denied
    

By default, only root may spawn processes which are not consuming CPUs. The command pssh uses this way to run a process on a remote node.

To allow other users to spawn this type of processes, add the user or group to the adminuser or admingroup list within ParaStation MPI using the command

  
  psiadmin> set adminuser +username
  psiadmin> set admingroup +group
    

or add appropriate adminuser and/or admingroup entries to the ParaStation MPI configuration file parastation.conf.