Shell Programming and Scripting

1) I have two scripts named as a.sh,b.sh running two different hosts host1 and host2
2) So now how to execute b.sh on host2 from a.sh on host1
3) Also I have few queries regarding the same as I want to execute few commands with sudo and with different user in script b.sh so how this can be achieved without user intervention ( I mean script should not ask for a password when we run this.)
Please provide any pointers to achieve this. Really it would be of immense help for me

IMHO, best way, is to use SSH with keys. Pretty much all *ix has ssh nowadays. However if you have some really, really, really old hosts or some kind of *ix based appliance without ssh, you might be able to fall back to using rsh (not restricted shell but the remote shell, it's called remsh if done from HP-UX) and using .rhosts controls (which are insecure, so you may have to put an option on service start to fix that) to avoid having to use a password.

For ssh with keys, generate your local key (the platform making the calls) and append the public key portion into the remote user's ~/.ssh/authorized_keys (or sometimes it's authorized_keys2) file. Then you should be able to ssh (get a shell) from the local host to the remote host at the remote user without a password... you can run scripts and communicate back and forth through that as well.

---------- Post updated at 03:04 PM ---------- Previous update was at 03:04 PM ----------

For the sudo side, look at the NOPASSWD option for commands that can be run.

Thanks for your recommendations.