title: what is the meaning of "../" in unix?
body: <p>while compiling the c++ programs in which i'm using the libxml library it is showing errors at the header files that no file or directory found. I have installed the library but it still showing errors. So i just type the above command after that every thing is working fine but i didn't understand it.</p>
  
  <p>what is the meaning of "../" in UNIX? my command in UNIX is like this "sudo cp -r libxml ../" what it means? how to give relative addresses in UNIX and what are the different wildcard is used.</p>