Introduction - If you have any usage issues, please Google them yourself
Ls under UNIX to achieve full functionality, while adding a directory tree can be generated. The realization of the contents: 1. How to read the contents of the directory 2. Directory sort 3. File types and how to know the type of document 4.-Bit operation and the use of mask 5. user and group ID database 6.UNIX the internal structure of the file system: i-node and data block 7. Change the current directory 8. output color change and column 9. learn and achieve ls command parameters 10. Analysis of the command line parameters