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Full Discussion: Can I change my hostname without messing things up?
Special Forums IP Networking Can I change my hostname without messing things up? Post 302958227 by Ultrix on Tuesday 20th of October 2015 10:28:49 AM
Old 10-20-2015
Can I change my hostname without messing things up?
I noticed my hostname is <my-full-name>s-macbook.local. I'm not sure exactly what information leaves the local network, and whether the hostname is included, but if it is, this would mean people on the Internet can look at my hostname and see who I am. Before anyone says that's not possible, there was a time when someone addressed me by my full name on YouTube, and that was when I was on an account that I had created through a GMail account that didn't have my real name on it, so they must have gotten my real name by looking at my hostname, or at least something similar to that.

So I would like to change my hostname, but I'm not sure if I can do this without messing things up on my local host. I'm afraid if I change things like my IP address or my hostname, I won't be able to use the Internet anymore. Can anyone explain to me how this works? I guess I basically have three questions: 1) Will changing my hostname affect my ability to log onto a network. 2) If so, why? 3) If so, what other information do I need to reconfigure so I can log onto a network again?

Additional information that may be relevant: I have no home network. I always use public WiFi networks.
 

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LEARN ABOUT OPENSOLARIS

rwall

rwall(1M)						  System Administration Commands						 rwall(1M)

NAME

       rwall - write to all users over a network

SYNOPSIS

       /usr/sbin/rwall hostname...

       /usr/sbin/rwall -n netgroup...

       /usr/sbin/rwall -h hostname -n netgroup

DESCRIPTION

       rwall reads a message from standard input until EOF. It then sends this message, preceded by the line:

	   Broadcast Message ...

       to all users logged in on the specified host machines. With the -n option, it sends to the specified network groups.

OPTIONS

       -n netgroup    Send the broadcast message to the specified network groups.

       -h hostname    Specify the hostname, the name of the host machine.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWrcmdc 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       inetd(1M), listen(1M), pmadm(1M), sacadm(1M), wall(1M), attributes(5)

NOTES

       The  timeout is fairly short to allow transmission to a large group of machines (some of which may be down) in a reasonable amount of time.
       Thus the message may not get through to a heavily loaded machine.

SunOS 5.11							    6 Nov 2000								 rwall(1M)
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