Move pages back into a "pages" folder

pages/common/cp.md

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+# cp
+
+> Copy files
+
+- Copy files in arbitrary locations
+
+`cp {{/path/to/original}} {{/path/to/copy}}`
+
+- Copy a file to a parent directory
+
+`cp {{/path/to/original}} ../{{/path/to/copy}}`
+
+- Copy directories recursive using the option -r. Optionally showing files as they are copied.
+
+`cp -r {{/path/to/original}} {{/path/to/copy}}`
+`cp -vr {{/path/to/original}} {{/path/to/copy}}`
+
+- Make a copy of a file adding and extension or changing an extension  
+
+`cp {{file.html}}\{,.backup\}`
+`cp file.\{html,backup\}`