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.
Regardless of what Linux distribution you are running, to change the command prompt, you always need to change the settings for the PS1 variable in the file .bashrc located in your home directory, as long as you are using the Bash, of course, not the Shell. Open the file .bashrc located in the top-level of your home directory, you may need to press Ctrl+H to see the hidden files/directories. . Find the lines bold-marked below, and change them to your liking, with the help of the list of keys below.