"/": the entry to the Linux file system. It is also the highest level directory
"/bin": The commands and functions required by the basic system are similar to those of "/usr/bin". Files in this directory are executable. Ordinary users can also execute them
"/boot": The kernel and the file required to load the kernel. grub system boot manager is also in this directory
"/dev": device file storage directory, such as terminal and disk
"/etc": all system configuration files
"/home": the default storage directory for ordinary users
"/lib": the directory where library files and kernel modules are stored
"/media": The mount point of the plug and play device is automatically stored in this directory. For example, after the U disk is automatically mounted, the cdrom/dvd will be in this directory
"/mnt": the mount point directory of the temporary file system
"/opt": the directory where third-party software is stored
"/root": the directory following the root of the Linux super user
"/sbin": Basic system maintenance commands, which can only be used by super users
"/srv": stores some data that needs to be extracted after the server is started
"/tmp": temporary file directory
"/usr": stores information such as system commands and applications used by users, such as commands and help files
"/var": stores frequently changed data, such as logs and emails