$sftp->do_mkdir("ftp2SAT5") or "Cannot make directory: $@" . $sftp->error; 

##</code><code>##

$sftp->do_mkdir("ftp2SAT5") or die "Cannot make directory: $@" . $sftp->error; 

##</code><code>##

$sftp->do_mkdir("ftp2SAT5") and die "Cannot make directory: $@" . $sftp->error;