235 .pem, .cer and .der are all file extensions for files that may contain a X.509 v3 certificate. The .der extension DER is the method of encoding the data that makes up the certificate. DER itself could represent any kind of data, but usually it describes an encoded certificate or a CMS container.
An earlier question (see here) asked for the difference between Menschen and Leute. I would like to understand how "Volk" relates to these (like in the Reichstag inscription, see picture below). Is...
Thus, "für die Menschen" is often used by politicians postulating what they think is important for the community as a whole, like "die Menschen brauchen mehr Grün in den Städten", and so on. This doesn't go for all imaginable cases, but I think it's a guideline for telling when to use the plural or the singular of "der Mensch".
Bei "Mensch" und "Menschen" entsteht die unangenehme Situation, dass man die Dativdeklinationsform "dem Menschen" vom Plural "den Menschen" nicht mehr unterscheiden kann, da der Artikel zur Bildung der Phrase bewusst weggelassen wird, da es sich um ein generelles Konzept und nicht einen bestimmten Menschen handelt.