[HPADM] [SUMMARY] An Interesting Query

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Date: Wed, 19 Nov 2003 00:38:40 -0800 (PST)
To: hpux-admin@dutchworks.nl

First of all Thankyou.. Eef Hartman OTSCH,DAVIDThierry
ITTY Bill Hassell Shaw, Matthew Whittemore, Dale
Whittemore, Dale Brett Geer for the responses...

Here is the Summary...

Query :

This might be a simple one for most of you....

But here it goes....

I cat a file e.g /etc/issue

But I have a line

Welcome to `uname -n`

And as you know it will not show the name as
requested..but will display..

Welcome to `uname -n`

What I can do is I can make a small
script to append this line into the /etc/issue..

But wonder it there is any other way this
can be achieved...

Hope I explained my query well...

In short can cating a file run the command in this
case uname -n...

Response :

- anyway uname -a doesn't change every day, does it ?
so you could just update it once every now and then

- Following Will give the results you are looking for.

cat << =EOI=
welcome to `uname -n`
=EOI=

- And, identifying the hostname and/or OS in the login
sequence is a security risk.

- First: /etc/issue is only used *PRIOR* to login, a
very unsecure environment, and of course, no shell is
running.

  Second: NEVER use the word "welcome" in /etc/issue.
It means lots of dollars to cyber-attorneys who will
use the word to defend hackers that breakin to your
system.

  Simply do this:

    echo $(uname -n) > /etc/issue

  Since uname -n should never change, there is no
reason to automate this with a script. I would not add
anything to /etc/issue except perhaps a warning that
access is restricted.
  This file appears BEFORE authentication so don't put
anything line uname -a (way too much info) or other
identifying info.

  ALSO: edit inetd.conf to add the /etc/issue option
to rlogind and telnetd:

   ... telnetd -b /etc/issue
   ... rlogind -B /etc/issue

- echo "Welcome to `uname -n`" > /etc/issue

  The resultant file on server 'fmdden' contained:

  Welcome to fmdden

  The /etc/issue file does not get executed, just
listed at login.

- I've seen issue files that had mneumonics in them
for o/s revisions etc,might want to man 5 issue (Cud
not get this working though)

In short ..its not a good idea to have your Hostname
displayed and also
best is to update manually or by a script the
/etc/issue

Thanks Gurus

br,

Deepak Cutinha

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• Previous message: Dan Zucker: "[HPADM] LTO-2 and Omniback/data protector drive setup suggestions"
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