From: Deepak John Cutinha (deepak_cutinha@yahoo.com)
Date: Wed Nov 19 2003 - 03:38:40 EST
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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