The basic structure of the linux System and the structure of the file system (configuration illustration) the linux system includes four major sections of the vLinux kernel v Linux Shellv Linux application v Linux File System: kernel is the heart of the system and implements the basic functions of the operating system. § Hardware: Controls hardware devices, memory management, hardware interfaces, and basic I/O; § software: Manages file systems and allocates memory and CPU time for programs. Shell is the user interface of the system and provides an interface for users to interact with the kernel. § Shell is a command interpreter that explains the commands entered by the user and sends them to the kernel for execution. § The Shell programming language has many features of a common programming language. The Shell program written in this programming language has the same effect as other applications. All standard Linux systems have a set of Assembly called applications. Including: l text editor l programming language l x wl office suite l Internet tool l database and so on Ø the file system is the way to organize files stored on disks and other storage devices. Linux supports a variety of popular file systems, such as EXT2, EXT3, FAT, VFAT, ISO9660, NFS, and SMB. Here I want to talk about file systems, first, the linux File System is a directory structure and a tree structure. The following describes the usage of each file/bin binary executable command/dev special file/etc system management and configuration file/etc/rc. d. Start the configuration file and script/home user home directory base point. For example, if the user's home directory is/home/user, you can use ~ User indicates the/lib standard programming library, also known as dynamic link shared library, which works like in windows. dll file/sbin system management command, which stores the temporary file storage point used by the system administrator/tmp public/root system administrator's main directory (haha, privileged class) /the mnt system provides this directory for users to temporarily Mount other file systems. The/lost + found directory is usually empty, and the system shuts down abnormally, leaving a "Homeless" file (what is it in windows. chk) Here, the/proc virtual directory is the ing of the system memory. You can directly access this directory to obtain system information. /Var the overflow of some large files. For example, the log files of various services/the largest directory of usr, almost all the applications and files to be used are in this directory. Including: /usr/x11r6 stores the x window directory/usr/bin numerous applications/usr/sbin hyperuser management programs/usr/doc linux documentation/usr/include development in linux and the configuration files of common dynamic link libraries and software packages for the header files/usr/lib required for compiling applications