Create .pem-file results in "file or folder not found."
<p>After creating a .key- and a .csr-file by following the steps of <a href="http://appbead.com/blog/how-to-setup-mail-server-on-debian-8-jessie-with-postfix-dovecot-1.html" rel="nofollow">this tutorial</a> (Step: <strong>Prepare SSL Certificate</strong>) it's not possible to do <code>sudo sed -i -e '$a\' appbead.com.pem</code>. I get the error "file or folder not found". So I created the file and tried it again, but nothing happens - meaning, no data was written into the .pem-file I manually created.</p>