cat. When /dream/hack/hello/flag.txt is entered, No! It said, cat. /dream/hack/hello/f? When I type ag.txt, why do I get an answer?

Please explain in detail from the beginning lol

When cat /dream/hack/hello/f *ag.txt is written like this, there is no output cat. /dream/hack/hello/f? Like ag.txt. The output is because/is appended, but why is that

I'm looking at the output of the html code and python code, but I don't know what else to check to find the flag.txt file... [html code] ! [image.png] (https://dreamhack-media.s3.amazonaws.com/attachments/28117f16a223bb6e7cf0bbf4f7ce00efc55e93fc00ed2

! [] (https://dreamhack-media.s3.amazonaws.com/attachments/01bbf5357560995b3c0da902f2fa7f7171b590a8e4b021e0d66242b1e85fba58.png) I can't even grasp the sensitivity when solving this problem... Please help! (Please give me a hint lol)

When I hit the VM web server port on Linux, bash: No such file or directory appears, what should I do?

I can't connect even if I click Create a server and click the link that comes after the web hacking problem. How can I fix it?

If you look at the lecture, the echo command says [a command that outputs the text entered by the user in the shell, and a file can also be created; if executed by attaching > file name to the end of the statement, the file name is generated as a name]. If you look at hint.txt in the txt file in the question. The /dream/hack/hello path appears Does the meaning of./ mean omitting an existing path? Even if I search for it, I understand

When “; [command] is entered like this in the input window, the command is executed later, but I don't really understand why “should be put in front of it... If I type “;, I'd be grateful if you could tell me how the server processes it!

I don't know anything...? I would appreciate it if you could tell me more Even if I look at anything else, I don't understand everything lol