Running the ls / command some files are coming out;  What are those files?  They are not even directories.  Output of ls /:  bin dev boot etc cdrom media mnt home lib lib64 proc root
4727
In Windows there’re perhaps only a couple of important folders (by important I mean important in my logical picture of the Windows file system) in the installation drive (in my case C:\). Namely Program Files and Windows. I simply stay away from Windows folder and the “add remove program files” is good enough to handle the program files folder of Windows. Of course there’s a folder named Users where the users (who are not admins) can access only their folders.  Thus there’s a clear picture at some level in my mind of the Windows file system. In Ubuntu, when I reach the location /, there’s a huge list of folders, most of which I have no clue as to what they contain. The /bin folder seems to be the equivalent of the Windows folder in windows. The /usr folder seems like it’s the equivalent of the Users folder in Windows. But even the /home folder looks like it can fit the bill.  Please understand that I do understand, that Ubuntu (Linux) has a different character than that of Windows, i.e., there need not be exact equivalent of Windows functions, in Ubuntu. All I am looking for is a bit more clearer picture of the Ubuntu file system.   This question is a part of a bigger question which I am splitting up to make it more answerable. The original question can be found here:
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Today I happened to press ' after ls So the command is ls' &gt; ls' quote&gt; ls' zsh: command not found: ls\nls &gt;  Can someone tell me, what is the ls quote thing?
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What does the command :  ls | wc -l   do? I know     wc &lt;filename&gt;   gives lines, words, and characters, and   wc -l &lt;filename&gt;    print the line count. But how it is being used with ls` is not clear. What does it do?
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Sometimes I see a command like  find . -name * -exec ls -a {} \;   I was asked to execute this.  What does {} \; mean here?
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I see there is an executable called "[" in /usr/bin. What is its purpose?
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Sometimes, I need to check only the directories not files. Is there any option with the command ls? Or is there any utility for doing that?  EDIT: I'm using Mac OS X, and ls -d gives me . even though I have directories.
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I'm currently developing a fake filesystem for a browsergame. I recently implemented ".." and "." folders so every folder has a reference to its parent. Then I checked in my terminal if "/" also has these folders.  Actually I was very surprised that it has a directory ".." which obviously is a reference to itself.  Is the reason for this consistency or is there a better explanation?  Edit: I'm basically looking for the document where this is documented.
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I'm .taring some files with the path example/super_user/Output.*.  The resulting .tar looks like this:  + example     + super_user           - Output.zip           - Output.xml           - Output.txt   But I want the file to be like the following:  - Output.zip - Output.xml - Output.txt   Do you know how I can achieve this while still being in another directory?
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I find that I often do the following:  %&gt; cd bla/bla %&gt; ls   I would like it that whenever I cd into a directory it automatically does an ls.  I fiddled with my .bashrc for a while, but couldn't figure out how to make it happen.
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fg, bg and jobs are used for job management. And for some reason (maybe it's just me), I'm not able to find where their binaries are nor their manpages (whereis prints no information). which gives no output. The commands themselves work just fine, though.  I ran commands like find /bin bg, but with no hits. I also ran find / bg to cast a wide net.
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I frequently run the ls command after running the cd command. How can I create an alias (like cs) for this operation?
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I want to get a list of the directories and their sizes in a list format like how you get when you do a ls -l.  The thing is that is there a one line command that can do this? I see others have long commands just to output this. That's just too long.  What command can do this or combination of commands that can be easily typed? du -h gives it, but it displays all of the sub-folders which is not what I want. just the current directories folders.
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I often come across interesting Linux commands that make me wonder; what are these commands actually doing?  Yes, they might be 'force-removing dependencies', 'installing programs' and doing lots of other stuff, but I'd like to know how they're doing it.  Looking into the source code seems the right thing to do then, but where am I supposed to get it from?  I suppose they'll be written in C?  EDIT: I'm not talking about packages installed using apt-get. I'm looking for the source code of linux/unix commands.
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I tried to use the ls command and got an error:  bash: /bin/ls: cannot execute binary file   What can I use instead of this command?
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What do these two commands mean?  cd ../   cd /..  I am ending up in two directories upwards the tree on the first command and in the root directory from the second command. Why does that happen?
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What is the purpose of the bin directory? What are some examples?
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I once saw a guy run a command and got a list of all installed applications on his computer. How do I do this?   I would like a list of my currently installed applications. I believe he used  somehow.