I have a requirement, I need to run a command at remote system using a ssh. Is there any way we can pass the username and password in shell script to the ssh command as we did it in one of the shell script for FTP.

ftp -n $i <<!EOF >>
user Username $PASSWD
cd /home/scripts
get $FILE\_up\_test
bye
!EOF


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My problem is I can't use rsh.

Is there any simple way other then using RSA based public and private keys- its bit tuff.