This command uses a user-specified predicate to select which nodes to
execute a user-specified command on.
ppred nodespec predicate action
For example, to find out on what processors in a 128 node system the file
/tmp/myprog is not present, you can use (assuming
csh is the shell)
ppred 1-128 '\!-s /tmp/myprog' 'echo $hostname'
(note the escape on the c-shell `not' symbol ! and the use of
`...' to prevent premature evaluation of the predicate and action.
should make the predicate anything that test can
execute.
test?