[Brahms-dev-l] nifty additional software (TRAMP) for xemacs (or emacs)

Hello.  I found a very nifty additional program for XEmacs (or Emacs) 
that I thought I need to share this info with you. It is called "TRAMP" 
and it let you access a REMOTE file (like files in rcas) from LOCAL 
XEmacs (or Emacs) (like your home machines ) by using ssh. This is very 
convenient if you use xemacs or emacs in X mode from remote machine.  (I 
am not talking about hardcore terminal-mode emacs or xemacs user here :) 
)  Since you use your local xemacs (or emacs), there is no more 
looooooong delay in network to bring X.  (It is similar in spirit of 
root daemon.)  Anyhow, I describe basic instruction about how to use it 
below.

1.  Get TRAMP from  http://savannah.nongnu.org/projects/tramp
2.  Install it according to its instruction.
3.  Edit your xemacs (or emacs) initial script.  Again, follow its 
instruction from its manual.  But, basically, you need to set following 
in init.el for xemacs (or something else for emacs)
(add-to-list 'load-path "~/(wherever you installed 
tramp)/tramp-2.0.36/lisp")
(require 'tramp)
(setq tramp-default-method "scp")

4.    you need to make sure that you can login to an remote machine 
without password.  Therefore, you need to use ssh public-private key 
feature.
    A.  You need to make your own private and public keys.  use 
ssh-keygen (for linux) and puttygen (for windows).  I don't know about 
other platform.
       ssh-keygen -t dsa  (or rsa )  (I don't know the different between 
dsa and rsa but I use dsa.  It seemed dsa has more bits.)
    B.  You need to copy your public key (in linux $HOME/.ssh/id_dsa.pub 
or id_rsa.pub) to authorized_keys2 file in an remote machine (NOTE:  If 
you want to access rcas, you must copy the key to every gateway machine 
(rssh01, rssh02, rssh03 and rssh04) since you don't know which you 
really use.)

Now, you should be able to connect to the remote machine without your 
password.  Try it before you go any further.

5.  Now, open your xemacs (or emacs) in your local machine to test this 
feature.  (Here is a few example.)
    A.  1st, the very simple example,  say I want to access a file 
sitting residing in  pii8 from xemacs in pii9. When you try to open a 
file (C-x C-f), your file location as /[pii8]/FileNameInpii8       
    B.  More complex example(It is called multi-hop in this program.) 
(This is really what I wanted to do!!!)  Access a file in rcas0022 from 
my home. You will type your file location (in your local home xemacs) as 
/[multi/ssh:username@rssh01.rhic.bnl.gov/ssh:username@rcas0022]/FileNameInRcas0022  
.  Now, you can use your own xemacs and edit codes in rcas!!!!


Hiro


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