1. The earliest Chinese characters for yin and yang are found in inscriptions made on âoracle bonesâ (skeletal remains of various animals used in ancient Chinese divination practices at least as early as the 14th century B.C.E.).
There is no general way to hide files in unix/linux in the dos sense. But.... 1. You can put files in a directory and then chmod 700 directory. Now only the owner of the directory can see the files. This is the closest thing to a correct answer to the question. 2. If the file name starts with a dot, it is treated specially by the shells and by ls.
That was one demonstration of Linux's security features. Linux, like UNIX, is a multi-user system and file permissions are one way the system protects against malicious tampering. One way to gain entry when you are denied permission is to enter the command su -. This is because whoever knows the root password has complete access.