I am using following code for FTP in shell script file and it is working.I want to migrate from FTP to SFTP.What code changes/steps will I have to do for SFTP ?

FIN

ftp -in <<FIN
open $SAP_UP_SERVER
user $SAP_UP_USER $SAP_UP_PASSWORD
asc

put $PM00_OUTPUTS_DIRECTORY/$SAP_UP_FILE_CSV /$SAP_UP_FILE_CSV
prompt ... End File ftp dates transaction


quit
FIN

You need some minor changes.
1 Call sftp with the site and user as command line options:
You can set up a passwordless connection, or enter it at the password prompt.

There is no ascii/binary command.
There is no prompt command
batch_file contains
I have never tried:

This is a example of using SFTP to send(i.e. put) a file in a shell(ksh) script, This assumes you have the appropriate SSH keys setup:

Code:

sftp -b /dev/stdin -v -o BatchMode=yes ${v_user}@${v_host} <<ENDSCRIPT
cd $remote_directory
put $local_file_path $remote_filename
quit
ENDSCRIPT
rc=$?
if [[ $rc != 0 ]] then
  print "***Error occurred...$rc" `date "+%Y-%m-%d-%H.%M.%S"`
else
  print "***Successful transfer...$rc" `date "+%Y-%m-%d-%H.%M.%S"`
fi

I will try below code :
sftp -b batch_file $SAP_UP_USER@$SAP_UP_SERVER

batch_file contains
put local_file_name remote_file_name
quit

my shell scripts are executing on unix server and transfering files to window server 2008. will above code work in this scenario ?If yes, then How to set up a passwordless connection ?

There are lots of sources for that info on the web, Search on "setup of ssh key pairs", here are a couple of links:
Setting up SSH public/private keys
https://help.launchpad.net/YourAccou...ngAnSSHKeyPair

You might also consider piping the file through 'unix2dos' prior to sending if you need a file with crlf line endings on the Windows system.