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A small Linux cheat sheet, introducing the very basic and very essential commands for surviving at the Linux CLI.
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===Moving around in the file system===
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<th>Command</th>
<th>Action</th>
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<td>pwd</td>
<td>"Print working directory" - show what dir you're in.</td>
</tr>
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<td>ls</td>
<td>List the contents of a dir.</td>
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<td>ls -l</td>
<td>List the contents of a dir and show additional info of the files.</td>
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<td>ls -a</td>
<td>List all files, including hidden files.</td>
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<td>cd</td>
<td>Change directory.</td>
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<td>cd ..</td>
<td>Go to the parent directory.</td>
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</table>
===Examining files===
<table border="1">'''<tr><th>Command </th><th>Action'''</th></tr><tr><td>file </td><td>Determine the type of a file.</td></tr><tr><td>cat </td><td>Concatenate a file.</td></tr><tr><td>less </td><td>View text files and paginate them if needed.</td></tr></table>
===Manipulating files and directories===
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<tr>
<th>Command</th>
<th>Action</th>
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<td>cp</td>
<td>Copy a file.</td>
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<td>cp -i</td>
<td>Copy a file and ask before overwriting.</td>
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<td>cp -r</td>
<td>Copy a directory with its contents.</td>
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<td>mv</td>
<td>Move or rename a file.</td>
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<td>mv -i</td>
<td>Move or rename a file and ask before overwriting.</td>
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<td>rm</td>
<td>Remove a file.</td>
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<td>rm -r</td>
<td>Remove a directory with its contents.</td>
</tr>
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<td>rm -i</td>
<td>Ask before removing a file. Good to use with the -r option.</td>
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<td>mkdir</td>
<td>Make a directory.</td>
</tr>
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<td>rmdir</td>
<td>Remove an empty directory.</td>
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</table>
===Files and directory Permissions===
