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Full Discussion: Check whether user has passwordless setup
Top Forums Shell Programming and Scripting Check whether user has passwordless setup Post 302695517 by ryandegreat25 on Monday 3rd of September 2012 05:09:28 AM
Old 09-03-2012
Check whether user has passwordless setup
Hello Unix scripters,

I have created a small tool that i can distribute to users to check whether they have passwordless login to a list of servers.

The problem in my code below is if user do not have the passwordless login yet, it will prompt them with a password login and my message below will never be displayed. Users then will either enter their password or just control-c which i dont want

Am i tackling the right logic and code here?

Code:
                echo "Logging in as \"${SERVERS_ID}\" to $SERVER"
                ssh  ${SERVERS_ID}@${SERVER} "exit"
                if [ "$?" -ne 0 ] ; then
                        echo "Couldn't connect to server, please verify whether server is up or your ssh passwordless login to \"${SERVERS_ID}\" is setup properly."
                else
                        echo "CONNECTED"
                fi

Last edited by ryandegreat25; 09-03-2012 at 06:16 AM..
 

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LEARN ABOUT LINUX

nwclient

NWCLIENT(5)							     nwclient							       NWCLIENT(5)

NAME

       nwclient - configuration file for NWClient program suite

DESCRIPTION

       This manual page describes the rather simple format of the file $HOME/.nwclient, the configuration file for the NWClient program suite.

FILE FORMAT

       The  file  $HOME/.nwclient  consists  of  several  lines, each describing a NWClient connection. Lines beginning with # and empty lines are
       ignored as comments.

       Because you can store passwords in .nwclient, the user programs will only scan .nwclient when only the file owner has access rights to  the
       file. The file must be have permissions 0600.

       To  specify  a  NWClient connection, the name of the file server, the user name to be used and a password is necessary. The server name and
       the user name are specified as SERVER/USER, and the password is separated by a blank. The password field can be omitted. In this  case  the
       user programs will ask you for a password. If you specify the password to be just a dash, then no password is used.

       The  first  valid  specification  has a special meaning: If the user does not name a server on the command line, the first specification is
       used as a 'preferred connection'.

       An example might be the following:

	  # The preferred connection, the user is asked
	  # for a password
	  FS311/ME
	  # And a passwordless account on another server
	  CD-SERV/GUEST -

       With these lines in $HOME/.nwclient, calling 'ncpmount /mnt' will mount the the file server FS311 with user name ME on  /mnt  after  asking
       the user for a password.

       ncpmount -S cd-serv /cd will silently mount the server cd-serv on /cd.

       nprint,	pqlist and other user programs that require a valid login also look up $HOME/.nwclient to find a file server, a user name and pos-
       sibly a password.

       Please note that the access permissions of .nwclient MUST be 600, for security reasons.

SEE ALSO

       ncpmount(8), ncpumount(8), slist(1), pqlist(1), nprint(1)

nwclient							    12/27/1995							       NWCLIENT(5)
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