Moved a directory to an unknown .../ place (three dots)
Solution 1:
You renamed the directory cakephp in /opt/lampp/htdocs/cake to .... Your command was perfectly valid, therefore it did not produce an error.
You should be able to find the directory at /opt/lampp/htdocs/cake/.... Note that files/folder starting with a dot are hidden (hence you need to use, e.g., ls -a /opt/lampp/htdocs/cake to see it).