Shell Programming and Scripting

You haven't told us what shell you're using. So we can only tell you what works with the most common shells. If you're using one of the less common shells, the following advice will not work.

Your continued refusal to show us EXACTLY what you are trying to do and to define what you consider successfully connecting with sftp makes it impossible to give you a definitive answer. The basic answer is that the command sequence:

Code:

sftp [sftp_option...] host
if [ $? -eq 0 ]
then    echo 'sftp connected successfully and ran requested commands successfully.'
else    echo 'sftp did not complete successfully or one or more requested commands failed.'
fi

which assumes that you are running this script interactively and manually entering sftp commands if sftp successfully connects to the specified host.