Deleted wrong file fs
git-svn-id: svn+ssh://atelier.inf.usi.ch/home/bevilj/group-1@92 a672b425-5310-4d7a-af5c-997e18724b81
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layout: page
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category-page: fs
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category-title: FileSystem
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tags: absolute relative path
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author: Marwan Announ
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title: fs
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---
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<h1>Absolute Path!</h1>
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<h2>First, what is a path?</h2>
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<p>
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A path is a location to a folder or file in a file system of a Operating System, then is a combination of characters
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and "/"
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</p>
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<h3>Now, I can tell you what is an absolute path</h3>
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<p>
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An absolute path is defined as specifying the location of a file or directory from the root directory(/).
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In other words we can say absolute path is a complete path from start of actual filesystem from / directory.
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</p>
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<h4>To write an absolute path-name:</h4>
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<p>
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Start at the root directory ( / ) and work down.
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<br>Write a slash ( / ) after every directory name (last one is optional)
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</p>
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<h5>Example:</h5>
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<p> cat group1.txt </p>
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if for example, we use the above line, this commands work only and only if the "group1.txt" exist in the current
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directory.
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<br> If not works, it's not a problem, the file is present somewhere, before restart the new command, you have to
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know where
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<br> the file is saved.
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<br> Now, we supposed that you know where your file is saved you can rewrite the command.
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<p> cat /home/a1/group1.txt</p>
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Now, we suppose that the file is saved into folder a1 in home,
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<br>where: /home is the location respect to root, in fact, you have to descend one level
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<br>in the file system like above to access your file.
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As you can see from the last commands, all the paths started from /directory whis is a root directory for every Unix
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machines.
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<p> Other examples, where all are absolute path</p>
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/home/user/Document/group1.txt
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/root/data/dev.jpg
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/var/log/messages
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<h5>Example of Absolute path's uses:</h5>
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Now, as we learned from the previous pages we can use other commands in addition to "cat", such as:
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<br>ls /etc
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<br>ls /usr/share/games if you have games obviously :)
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<br>cd /usr/share/games
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<br>cd ~
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<br>cat /etc/passwd
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<br>cp /etc/passwd /tmp
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<br>cd /tmp
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<br>cat passwd
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<h6> Now I will show you in many examples.</h6>
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and so on.. with the sintax like above.
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<!-- <p>
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<img src="0.1.jpg" alt=" ls of /etc without"/>
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</p>
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<p>
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<img src="0.2.jpg" alt=" cd /tmp (go to tmp yuppyy)"/>
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</p> -->
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<!-- quiz in javascript about absolute and what the user know after the reading-->
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@ -1,57 +0,0 @@
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---
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layout: page
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category-page: fs
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category-title: FileSystem
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tags: absolute relative path
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author: Marwan Announ
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title: fs
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---
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<h1>Relative Path!</h1>
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Relative path is defined as path related to the present working directory(pwd).
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<br>Suppose I am located in /home/user1 and I want to change directory to /home/user1/Documents.
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<br>I can use relative path concept to change directory to Documents.
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<br> <br> <br>
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<p> pwd/home/user1cd Documents </p>
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<br> <br> <br> Then you could tell me what is the difference between Absolute and Relative.
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<br> If you observe, there is a little bit difference, where in relative there is no "/".
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<br> Meanwhyle using absolute path you have to write "/", in this case cd /home/user1/Documents.
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<!-- esempi con altri comandi+foto -->
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<h2>Example of Relative path's uses:</h2>
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Now, as we learned from the previous pages we can use other commands in addition to "cat", such as:
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<br><br>pwd
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<br> cd .
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<br><br>pwd
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<br> cd ..
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<br><br>pwd
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<br> cd ..
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<br><br>pwd
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<br> cd
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<br><br><br> and so on.. I know, it's boring but it is one of the disadvantages of not being present in the
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<br>working directory
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<h3> Now I will show you in many examples.</h3>
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<!--<p>
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<img src="1.1.jpg" alt=" pwd to know where i am "/>
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</p>
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<p>
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<img src="1.2.jpg" alt="relative paths command"/>
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</p>
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<p>
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<img src="1.3.jpg" alt=" funning with 'cd to return back"/>
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</p> -->
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<!-- quiz in javascript about relative and what the user know after the reading-->
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@ -1,18 +0,0 @@
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---
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layout: page
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category: File System
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tags: absolute relative path
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author: Marwan Announ
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title: fs
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---
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<h1>ABSOLUTE VS RELATIVE</h1>
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<p>
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Now, you can ask, why I have to use one or another?
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<br> What is the difference? and questions like this.
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<br> <br> <br> Don't worry, the answer it's easy.., we can use an absolute path from any location
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<br> whereas you want to use relative path we should be present that you have to be in the working directory.
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</p>
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<!-- quiz about absolute vs relative, where the user have to choose one or another(javascript) -->
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