psh - parallel remote shell
psh [-i interface] [-l user] noderange command
psh {-h|--help|-v|--version}
psh is a utility used to run a command across a list of nodes in parallel.
ssh must be set up to allow no prompting for psh to work.
Note: this command does not run through xcatd like most xCAT commands do. This means you must either run it on the management node, or have a network connection between your machine and the nodes.
The NIC on the node that psh should communicate with. For example, if interface is eth1, then psh will concatenate -eth1 to the end of every node name before ssh'ing to it. This assumes those host names have been set up to resolve to the IP address of each of the eth1 NICs.
Log into the nodes as the specified username. The default is to use the same username as you are running the psh command as.
See noderange(3).
Command to be run in parallel. If no command is give then psh enters interactive mode. In interactive mode a ``>'' prompt is displayed. Any command entered is executed in parallel to the nodes in the noderange. Use ``exit'' or ``Ctrl-D'' to end the interactive session.
Print help.
Run uptime on 3 nodes:
B<psh> I<node4-node6> I<uptime>
node4: Sun Aug 5 17:42:06 MDT 2001 node5: Sun Aug 5 17:42:06 MDT 2001 node6: Sun Aug 5 17:42:06 MDT 2001
Run a command on some BladeCenter management modules:
psh amm1-amm5 'info -T mm[1]'
Remove the tmp files on the nodes in the 1st frame:
psh rack01 'rm -f /tmp/*'
Notice the use of '' to forward shell expansion. This is not necessary in interactive mode.
Egan Ford <egan@us.ibm.com>