How can we use the tag <h1> in body tag,when we have already ended the tag <head> before body of the document

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but head and heading serve very different purposes.

I know it is confusing, they might sound similar, but they are different

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A post was split to a new topic: Html structure

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Hello. Thank you very much for your kind reply. I have another question. Upon typing ls -a, we will get the following:

. matrix-reloaded.txt matrix.txt superhero tatang.txt
… matrix-revolutions.txt scifi superman.txt wonderwoman.txt

What does “.” and “…” mean in plain english and please give me example within this context. I really want to know this before going further.

Also, I accidentally type ls -s and it gave me something. What is “ls -s” for?

Please do enlight me on this matter.

Thank you very much.

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They are something called hard links, . is for the current directory (you can use this to execute files in the current directory: ./script.py

.. is a hard link to the parent directory, which explains why cd .. will go the the previous directory. I have no idea, thankfully we have man pages: man ls, which gives:
-s, --size
print the allocated size of each file, in blocks

So, it gives the filesize. If we combine this with the h flag (-h):

ls -sh

what does h do? From the man pages:
-h, --human-readable
with -l and/or -s, print human readable sizes (e.g., 1K 234M 2G)

So it makes the file size more human readable.

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Hello, thank you very much for your kind insights.

  1. Suppose we have the following data structure:

Moon/Mars/Cabal
Mars contains: Rock.txt Mountain.txt

I am now on “/Mars”.

So: Where is the “.” and “…” here?

Again, to be double sure:
Is it correct when I say “Moon is the parent directory of Mars and Cabal”?
Is it also correct to say “Mars is the parent directory of Rock and Mountain”?

Thank you very much

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if you do ls -a you should see . and .., each directory has them.

Also correct, + mars has moon as direct parent directory. Just a small addition.

This is wrong. rock and mountain are files, they are in the moon directory

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Sorry, but can we also say: rock and mountain are files, they are in Mars directory?

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I got that wrong, that should be mars directory indeed. And the mars directory has moon as parent directory

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Allright. So, the name “Parent Directory” only and only refers to the mother of all directories. Am I right in this matter?

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No, the mother of all directory’s is the root directory cd / (which contains all directory’s)

The parent directory refers to the parent, let’s say i have i have:

/home/user/Documents

Documents parent directory is user, user parents directory is home and home parents directory is root (/)

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Ah,I see. As I suspected.

Thank you very much for the enlightment. I really appreciate your help, comrade.

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I apologize for asking this as I do not want to create new thread.

Can I insert comment before !DOCTYPE html tag ??

Thank you very much.

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Well, have you tried? I believe this is possible