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Re: need help scripting multiple xfree startups


From: "Dennis Foreman" <dforeman@stny.rr.com>
Reply-To: <dforeman@stny.rr.com>
To: <cygwin-xfree@cygwin.com>
Subject: need help scripting multiple xfree startups
Date: Sun, 21 Jul 2002 14:30:18 -0400

[snip]
I need to repeat this 8 more times for each of 8 different machines. Is
there some way of automating this? (Yes, I know a script will do it. I need
some detailed help on what to put in the script.) Especially eliminating
having to type a pw every time
There is plenty of information about this in the ssh man page. Here's a quick recipe:

1) Open a Cygwin bash window and cd into ~/.ssh (if the directory doesn't exist, create it).
2) Run "ssh-keygen -t rsa1". Accept the default filename of ~/.ssh/identity and use a blank passphrase. PROTECT THIS FILE! Anyone who gets ahold of it can use it as if they were you and gain access to systems without a password or passphrase. Consider yourself warned!
3) FTP the resulting file named identity.pub onto each of the target systems and put it in /tmp (DO NOT put it in ~/.ssh).
4) On each remote system, append the contents of the identity.pub file to the file ~/.ssh/authorized_keys:

cat /tmp/identity.pub >> ~/.ssh/authorized_keys

5) At this point, you should be able to ssh to each remote system and get in without being prompted for a password.

and clicking to establish the Xwindow on the
X desktop.

regards,
D. J. Foreman
website: http://WWW.CS.Binghamton.EDU/~foreman
I'd say you've already figured out most of this part. To automatically launch an xterm and have it run a command on a remote machine, put the following command in your favorite X startup script (e.g. startxwin.bat, startxwin.sh, or .xinitrc) in the same section where you see other xterms being launched (I've put backslashes to indicate that this should all be on 1 line):

ssh -X -l remote_username remote_hostname \
xterm -title "remote_username@remote_hostname" \
-e remote_command

If you're putting this in startxwin.bat, you may need to preceed it with "run" or "start" (I don't know for sure, I don't use that script). If you're putting it in startxwin.sh or .xinitrc, append an ampersand ("&") to the end.

Want it to act on 8 other machines? Repeat the same command 8 more times with a different value for remote_machine each time.

As for getting the xterm to place itself on your screen without having to click: If you're using the default Window Manager twm, copy the file /usr/X11R6/lib/X11/twm/system.twmrc to ~/.twmrc. Then edit ~/.twmrc and add "RandomPlacement" on a line by itself towards the top of the file just after the comments. If you're using some other window manager, then consult its man page.


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