[SOLVED] Script question: Shell script in kde to log in on a server with ssh

c4719929 · 01-31-2011, 04:42 AM

Hi everyone,

I created a script that a should run, and that automaticly logs them in on a server via following command: ssh -i password -XC username@server

The script asks for the password of the user and then it should log in to the server.

Here is the code I wrote:

Code:

username=`eval whoami`
password=`kdialog --title "Log in " --password "Enter password:"`
server="servername_or_ip"
ssh -i $password -XC $username@$server

Does anybody have an idea how I can pull this off?

I get following error when I execute the script:

Quote:

not accessible: No such file or directory.
: Name or service not known

I suppose the problem is the way I execute the ssh, but I don't know how to execute it in another way.

Thx in advance!

druuna · 01-31-2011, 05:04 AM

Hi,

First and probably biggest problem I see: You cannot give the ssh command a password with an option (-i is used for something else, there is no option to supply the password). You need to give it by hand or set up ssh to use password-less log in.

Hope this helps.

c4719929 · 01-31-2011, 06:11 AM

Ok I tried it before and it worked, but now it doesn't work anymore, so I guess you are right

So then my code would be:

Code:

username=`eval whoami`
password=`kdialog --title "Log in " --password "Enter password:"`
server="servername_or_ip"
ssh -XC $username@$server
Something to give enter the password

Ssh to use password-less log in is impossible. I do not have root access.

My script still gives the error

Quote:

: Name or service not known

druuna · 01-31-2011, 06:20 AM

Hi,

Quote:

Originally Posted by c4719929

Code:

username=`eval whoami`
password=`kdialog --title "Log in " --password "Enter password:"`
server="servername_or_ip"
ssh -XC $username@$server
Something to give enter the password

The bold parts are not needed:
- the whoami command doesn't need to be evaluated,
- the password dialogue has no use,
- ssh will ask for the password, no need to do anything extra.

Code:

username=`whoami`
server="servername_or_ip"
ssh -XC $username@$server

Quote:

Ssh to use password-less log in is impossible. I do not have root access.

You do not need root access to set up password-less ssh (assuming that you don't use root to ssh [you shouldn't....]).

Hope this helps.

c4719929 · 01-31-2011, 07:03 AM

Still having the problem with the

Quote:

: Name or service not known

errorcode.
It's like the script doesn't detect ssh -XC $username@$server as a command.
Do I need to add something to the script like "#! /bin/csh -f" or something else?

The problem is I may not set up the server for password-less login. Its at my work. I can't change anything to the configuration. So we'll have to do it by entering the password in the console.

Thx for your help so far :-)

druuna · 01-31-2011, 07:18 AM

Hi,

It would be helpful if you posted the code you are using at the moment.....

Anyway: The below code works on my side:

Code:

#!/bin/bash

username=`whoami`
server="exile"
ssh -XC $username@$server

- exile is the name of one of my servers, substitute it with the valid hostname (or IP) of the machine you want to connect to,
- I do get a message about the -X option, but is is not a show-stopper. You might or might not need the -XC flags.

Hope this helps.

Ashkan_s · 01-31-2011, 07:21 AM

If you want to automate ssh login in a shell script you can use "expect".

here is an example: http://bash.cyberciti.biz/security/e...-login-script/

c4719929 · 01-31-2011, 07:45 AM

Quote:

Originally Posted by Ashkan_s

If you want to automate ssh login in a shell script you can use "expect".

here is an example: http://bash.cyberciti.biz/security/e...-login-script/

Already tried the script, before posting here. Doesn't work.
The directory /usr/bin/expect is not installed on my system (Linux Novell Suse 10)

c4719929 · 01-31-2011, 08:02 AM

Quote:

Originally Posted by druuna

Hi,

It would be helpful if you posted the code you are using at the moment.....

Anyway: The below code works on my side:

Code:

#!/bin/bash

username=`whoami`
server="exile"
ssh -XC $username@$server

- exile is the name of one of my servers, substitute it with the valid hostname (or IP) of the machine you want to connect to,
- I do get a message about the -X option, but is is not a show-stopper. You might or might not need the -XC flags.

Hope this helps.

Ok I copied your code:

Code:

#!/bin/bash
username=`whoami`
server="tpi"
ssh -XC $username@$server

Now I get the error:

Quote:

./kdialog.sh: Command not found.

kdialog.sh is the name of my script atm.

Edit: Removed the -XC flags and still the same error

Edit2: When I execute following code, the script echoes the username and server

Code:

username=`whoami`
server="tpi"
echo $username
echo $server
#ssh $username@$server

If I remove the echo's and uncomment the last line, it gives me the ": Name or service not known" error again...

Ashkan_s · 01-31-2011, 08:16 AM

Quote:

Originally Posted by c4719929

Already tried the script, before posting here. Doesn't work.
The directory /usr/bin/expect is not installed on my system (Linux Novell Suse 10)

Can't you install it using YAST or don't you want to install it?

BTW, It exists in opensuse repositories. http://download.opensuse.org/distrib...1-2.7.i586.rpm

druuna · 01-31-2011, 08:25 AM

Hi,

./kdialog.sh: Command not found. This tells you the script is not found in the directory you are standing in (bash cannot find kdialog.sh). Use the full path to run the script or cd into the directory were kdialog.sh is.

Just in case, can you post the output of file kdialog.sh and od -c kdialog.sh

Hope this helps.

c4719929 · 01-31-2011, 08:42 AM

Quote:

Originally Posted by Ashkan_s

Can't you install it using YAST or don't you want to install it?

BTW, It exists in opensuse repositories. http://download.opensuse.org/distrib...1-2.7.i586.rpm

If I could install it (don't have the root-password), I have to install it on 50+ pc's. A lot of trouble to get a stupid script to work...

c4719929 · 01-31-2011, 08:49 AM

Quote:

Originally Posted by druuna

Hi,

./kdialog.sh: Command not found. This tells you the script is not found in the directory you are standing in (bash cannot find kdialog.sh). Use the full path to run the script or cd into the directory were kdialog.sh is.

Just in case, can you post the output of file kdialog.sh and od -c kdialog.sh

Hope this helps.

file kdialog.sh

Quote:

kdialog.sh: Bourne-Again shell script text

od -c kdialog.sh

Code:

0000000   #   !   /   b   i   n   /   b   a   s   h  \r  \n   u   s   e
0000020   r   n   a   m   e   =   `   w   h   o   a   m   i   `  \r  \n
0000040   s   e   r   v   e   r   =   "   t   p   i   "  \r  \n   s   s
0000060   h       $   u   s   e   r   n   a   m   e   @   $   s   e   r
0000100   v   e   r
0000103

Btw: I'm in the directory the script is in when I execute it.

druuna · 01-31-2011, 08:54 AM

Hi,

The output of the od command tells me that the kdialog.sh is not a normal linux file. The file terminator is wrong, \r \n => indicates a dos/windows file. \n \n would point to a linux file. That is why your script won't execute.

How are you creating the script?

Hope this helps.

c4719929 · 01-31-2011, 09:00 AM

Quote:

Originally Posted by druuna

Hi,

The output of the od command tells me that the kdialog.sh is not a normal linux file. The file terminator is wrong, \r \n => indicates a dos/windows file. \n \n would point to a linux file. That is why your script won't execute.

How are you creating the script?

Hope this helps.

Ok the puzzle starts to fall together

I copied the code from my windows pc in a text file and copied that code into a file on my Linux pc.
So if I create a new file and I type it over it should work I hope.
I'll keep you posted!