Encrypting multiple files with AES256 using tar command

.dmg files I used before and I failed to open it after sometimes ,it simply refused to open . That File Vault is ok ,I use that too . But I may need to know some other ways to encrypt files too .

(a folder is a directory is a folder), how to understand this ? A folder is a directory in a folder ? Or a folder is also a directory?

I could not find anything on internet how to encrypt , in terminal , with openssl several files at one command ,that is why I cannot post anything useful here ,it is only a waste of time ,it is only a guessing - that it maybe so or not. Over the years I learned ,not to waste my time on stuffs which is not clear to me ,or which I cannot in any way understand .

Or maybe you have an idea how to use the terminal to encrypt several files at once with openssl ? That would be a great help.

I do not know what Age is ,but I may prefer to stay in my own Table . Better is to use my own computer and not depend on anything outside software . Yes .dmg files are easy to create ,but they have some defects. Over the years whenever I moved to a new Mac all those .dmg files died after a few months. Then this data protection ? I cannot use my Apple ID on this Mac - horrible developments.

I will just study the CLI and see what is possible or what is not possible.

Is that Age is used on the CLI ? I looked at it ,but understand nothing about it.

Encrypted DMG files can and do work, and are widely used. What command and what errors are you encountering?

I typed the passwords in and it did not opened - it is a right password as Bitwarden newer fails in this respect . Or it simply not opening ,it does not asking for a password at all. But I like .dmg files - wery easy to create them in minute - but how to ensure that they will always open ? What to do ,so that I can keep them always in good condition? Or those keys goes out of validity ? Maybe I most change passwords 1 a year ? Why is so that I cannot open a .dmg file on a new Mac ? I have the same Apple ID ,so I cannot understand what is the fault .

ankblomma@iMac-som-tillhor-ankblomma-2 ~ % zip -r retep.png.zip /Users/ankblomma/Desktop/retep.png zip
	zip warning: name not matched: zip
updating: Users/ankblomma/Desktop/retep.png (deflated 1%)
ankblomma@iMac-som-tillhor Ankblomma-2 ~ % 

Something here is also wrong - but creating zip files will do the job too . I need to understand something here.

If I say - « I will go to morgon to London » - this is terribly clear to all whom can English .

But it is not the same if I say it in a cryptographic way. Z= YxC Or a Chinese tries to read it at the first time .

There are instructions to the CLI -but those instructions are wery haphazardly made - not clear instructions with real examples .

Yes that is true . All is wery gibberish as that of an AES256 encryption. Just looking at all those mess makes me shake into ice . There should be a much simpler and more real examples to the CLI .

I rarely meet real teachers in any field whom are wery logical and instructive.

Compressed is not that good ,I prefer the files uncompressed

Then what is the command line to create an unencrypted compressed tar file ? ,when this is clear from there I will see what to do.