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Is there any global command in UNIX?

 
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Top Forums UNIX for Dummies Questions & Answers Is there any global command in UNIX?
# 1  
Old 12-23-2010
Question Is there any global command in UNIX?
Hi,

I heard about some global commands for information gathering in UNIX systems. some commands which will execute on a UNIX system in a local network and other systems will reply to these command with some information about themselves.

for example, from one of those UNIX machines (in a computer network) we run "bg" command and then we can see background processes from all UNIX machines on that network!

Is it true? and, if it is true so, Why I couldn't see those information now?


Any help would be greatly appreciated.
# 2  
Old 12-23-2010
As far as I know, there's no such command. And especially bg won't do that, since it's not even a system command, but a shell builtin that can't even see the background processes of other shells on the same system.
This User Gave Thanks to pludi For This Post:
siavash
# 3  
Old 12-23-2010
Thank you very much for this super fast answer,

I used "bg" just as an example to describe my question.
So, are you saying that there is no "Information Gathering Command" in UNIX at all? (I don't know the exact name, I mean any command which could execute on other systems With Out authentication)


p.s:
We can execute many commands on a remote system using rsh/ssh but then we must authenticate ourselves as a privileged user! in my question (as I heard) I'm trying to find some commands which could be executed with out those authentication.
# 4  
Old 12-23-2010
If this were a quiz question I'd answer "finger".

Many Systems Administrator disable "fingerd" for this reason.
This User Gave Thanks to methyl For This Post:
siavash
# 5  
Old 12-23-2010
No Smilie It's not my homework or anything like that. It's just for my own knowledge.

Thank you for this clue, I will take a look at commands like finger and I will come back if I couldn't find the answer.

p.s:
Any further information about this topic would be greatly appreciated Smilie
# 6  
Old 12-23-2010
In addition to methyl answer, there are also the similar rwho and ruptime programs both using the rwhod daemon.
This User Gave Thanks to jlliagre For This Post:
siavash
# 7  
Old 12-23-2010
Thanks! It would be helpful.

Also, I found that there is an "on" command! which can 'Execute a command on a remote system, but with the local environment'. I think this will not prompt for any password! (But I'm not sure).
 
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