automatic ssh into remote server using ksh

Shell Programming and Scripting
1

I still have to enter the password when I want to auto login w/o having to do any command line entry. This code works but I don't want to have to enter the password at the command line. After manning ssh I still am not sure what settings I need to change. Please help. Thanks!

<<<output>>>
$ sh file_exists.ksh
clport@dwebapp1's password:
file exists

<<<code>>>
#!usr/bin/sh

hostname=dwebapp1
login_name=clport

# password=

if [ -n `ssh -l $login_name@$hostname 'ls test/testfile.txt 2>/dev/null'` ]; then
echo file exists
else
echo "file doesn't exist";
fi

2

Did you set up the SSH keys?

3

i suggest you to use "expect"
for details man expect

try these site
http://expect.nist.gov/

4

As syndex points out, you need to configure ssh keys correctly for passwordless (i.e. key-based) authentication to work. There are plenty of documents detailing this on the net.

You might also want to look into the Net::SFTP Perl module.

Cheers,
ZB

5

I set up my keys using ssh-keygen ; copied the key to .ssh/authorized_keys on the remote server. Logged out, logged in and exicuted the script at the beginning of this post and I still was forced to enter command line password. ARGH! I don't understand what I am doint wrong.

The authenticity of host 'dwebapp1 (57.2.20.1)' can't be established.
. key fingerprint is RSA.
Are you sure you want to continue connecting (yes/no)? y
Please type 'yes' or 'no'.
yes
Warning: Permanently added 'dwebapp1,57.2.20.1' (RSA) to the list of known hosts.
clport@dwebapp1's password:
file exists
$ ksh file_exists.ksh
clport@dwebapp1's password: