NJAU OS course design simulated linux

Operating system course design and simulation Linux system

Project Introduction

1. This project is designed based on the relevant topics in the operating system course design of Professor JHY, School of Artificial Intelligence, Nanjing Agricultural University (difficulty coefficient 5)
2. All this project is designed in Java language, and simulates the process management, job management, scheduling management, equipment management, file management and other contents of Linux system.
3. All source codes of this project are completed within 30 days, and the time is relatively rush. Please give me some advice on any inappropriate design.

Run and install

1. clone or pull all files
2. Create a new Java project using IDEA (recommended) or Eclipse (JDK version >= 1.8)
3. Delete the default generated src directory under the project
4. Copy all /src, /static/, xxxxx-jobs-input.txt files after decompression to the project root directory
5. Use the run function in IDEA or Eclipse to start running, or generate .jar executable files yourself, etc.

Use and Instructions

1. For the first time, you need to delete all contents in the xxxxx-jobs-input.txt file except the first line. Remember that there is no newline at the end of the first line!
2. The visual operation interface, file system command line, and file system window provided by this project can basically explore functions by yourself.
3. The file system command line provides the following commands (can only be used under English input method)
   • ls [-l] Display file information in the current directory -l Display detailed information
   • cd dir switches the current working directory dir Specify the directory absolute or relative path
   • mkdir dir [-p] Create directory dir in the current directory Specify the absolute or relative path of the directory -p Recursive creation
   • touch file/dir Create a new file in the current directory; if the file already exists, update the file modification time file/dir file or directory path
   • rmdir dir -p Delete directory dir in the current directory Directory path -p When the subdirectory is deleted, it becomes an empty directory, delete it together
   • rm file/dir [-r] Delete file or directory file/dir file or directory path -r Recursively delete, the parameter must be a directory
   • close file/dir Close file or directory file/dir File or directory path
   • cat file display file content file file path
   • vim file modify file content
     file file path
   • link old new link to an existing file old directory of existing files new file directory
   • chmod mode path [-r] Change the permissions of a file or directory mode permission mode 000-777 path file or directory path -r Recursively modify, and modify the permissions of the directory and all the following subfiles
   • explorer Open Explorer
4. Enter the explorer command on the command line to enter a more friendly window-style interface, providing the following functions (please try to minimize mouse movement when clicking the mouse)
   • Left-click the directory and enter the relevant directory.
   • Left-click the file to view the file information.
   • Double-click the file with the left mouse button to open the file or directory.
   • Right-click the stand-alone file to open, rename and delete
   • Right-click the blank space of the stand-alone file list, create a new file or directory.
   • The forward and back button on the upper left side of the mouse stand-alone machine is switched to the historical access path.
5. The .jfd file in the /src/gui directory is the configuration file when drawing swing by IDEA plug-in JFormDesign, and does not affect the operation of the program; if you need to use it, please download it yourself

Friendly Tips

1. Please do not copy the source code directly to submit the coursework assignments!
2. The code structure of this project is relatively large, and secondary development is not recommended. It is encouraged to learn from ideas
3. The source code contains detailed comments to meet basic reading needs
4. If there are still problems, please contact qq: 404874351