a89419190d
git-svn-id: svn+ssh://atelier.inf.usi.ch/home/bevilj/group-1@170 a672b425-5310-4d7a-af5c-997e18724b81
77 lines
2.3 KiB
HTML
77 lines
2.3 KiB
HTML
---
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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: paths
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---
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<p>
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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, 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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<h6>Example of Absolute path's uses:</h6>
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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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<pre>
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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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</pre>
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<br><br><br> <h7> Read this if you are not Bill Gates, so read this.. </h7>
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<p> So, if you dont't understand anything, like me before this writing, you have to know that Absolute pathnames start with a
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<br>slash on the left(simplyfied version..).
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<br>For example etc/passwd is a good example of Absolute pathnames.
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</p>
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