+.It Fl b Ar batchfile
+Batch mode reads a series of commands from an input
+.Ar batchfile
+instead of
+.Em stdin .
+Since it lacks user interaction it should be used in conjunction with
+non-interactive authentication.
+.Nm
+will abort if any of the following
+commands fail:
+.Ic get , put , rename , ln ,
+.Ic rm , mkdir , chdir , ls ,
+.Ic lchdir , chmod , chown , chgrp , lpwd
+and
+.Ic lmkdir .
+Termination on error can be suppressed on a command by command basis by
+prefixing the command with a
+.Sq Ic \-
+character (for example,
+.Ic -rm /tmp/blah* ) .
+.It Fl o Ar ssh_option
+Can be used to pass options to
+.Nm ssh
+in the format used in
+.Xr ssh_config 5 .
+This is useful for specifying options
+for which there is no separate
+.Nm sftp
+command-line flag.
+For example, to specify an alternate port use:
+.Ic sftp -oPort=24 .
+.It Fl s Ar subsystem | sftp_server
+Specifies the SSH2 subsystem or the path for an sftp server
+on the remote host.
+A path is useful for using
+.Nm
+over protocol version 1, or when the remote
+.Xr sshd 8
+does not have an sftp subsystem configured.