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How to give user name and password in a single command to login to remote server

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# 1  
Old 01-07-2011
How to give user name and password in a single command to login to remote server
Hello All,

I'm new to unix and i need the below favour from you.

I have list of 50 unix server. I need to login to all the server one by one and with the same user and password. I will declare the user name and password globally in the script.

for example :

Code:
servername- hyperV
user name - jack
password - kcaj

Code:
ssh jack@hyperV

Using above command till now i login to server and i need to type the password manually

Trouble facing:

Before it prompts password it asking the below

Code:
Are you sure you want to continue connecting (yes/no)?

After i give "yes "

then only i asking for password...

so i need this whole to automate.... Please help meSmilie




Torubles facing by
Last edited by rbatte1; 12-29-2017 at 10:35 AM..
# 2  
Old 01-07-2011
Not sure if this will work but you can give a try.
create a file say file.dat and just type "yes" and passowrd in there like:
Code:
echo "yes" > file.dat
echo "passwprd" >> file.dat

Then pass this file to ssh command as below.
Code:
ssh jack@hyperV < file.dat

And see if login happens without propmting.
# 3  
Old 01-07-2011
I have tired your option but nogo.It saying the below error and again asking for yes or no ?

"Pseudo-terminal will not be allocated because stdin is not a terminal."
# 4  
Old 01-07-2011
ssh has no option, for security reasons, that allow you to specify the password on the command line, or through redirection from a file. If you need a one-time only script, search this site for an expect solution. If you need to access these servers regularly, use said expect solution to distribute the key for Public Key authentication.
# 5  
Old 01-07-2011
Make ssh-keygen .. Public and private keys.... and then u didn't need enter password for login remote host!!!!

---------- Post updated at 08:18 PM ---------- Previous update was at 08:14 PM ----------

1. Create key

Press ENTER at every prompt.
Code:
linuxconfig.local$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/user/.ssh/id_rsa):
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/user/.ssh/id_rsa.
Your public key has been saved in /home/user/.ssh/id_rsa.pub.
The key fingerprint is:
b2:ad:a0:80:85:ad:6c:16:bd:1c:e7:63:4f:a0:00:15 user@host
The key's randomart image is:
+--[ RSA 2048]----+
|  E.             |
| .               |
|.                |
|.o.              |
|.ooo o. S        |
|oo+ * .+         |
|++ +.+...        |
|o. ...+.         |
|  .   ..         |
+-----------------+
linuxconfig.local$

For added security '''the key itself''' would be protected using a strong ''passphrase''. If a passphrase is used to protect the key, ssh-agent can be used to cache the passphrase.
2. Copy key to remote host

Code:
linuxconfig.local$ ssh-copy-id root@linuxconfig.org
root@linuxconfig.org's password:

Now try logging into the machine, with "ssh 'root@linuxconfig.org'", and check in:

.ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.
linuxconfig.local$
3. Login to remote host

Note that no password is required.
Code:
linuxconfig.local$ ssh root@linuxconfig.org
Last login: Tue Apr  3 12:47:53 2007 from 192.168.0.39
 linuxconfig.org#

Last edited by pludi; 01-07-2011 at 03:07 PM..
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