Ubuntu is a Linux operating system mainly based on desktop applications.
Ubuntu has only one root directory [/], and all files are under this directory
x├── bin # bin is the abbreviation of Binary. Stores the most commonly used executable files (binary) in the system.├── boot # The Linux kernel and system startup files are stored here, including Grub and lilo launcher programs.├── dev # dev is the abbreviation of Device. This directory stores Linux external devices, such as hard disks, partitions, keyboards, mice, USB, etc.├── etc # This directory is used to store all configuration files and subdirectories required for system management, such as passwd, hostname, etc.├── home # The user's home directory. In Linux, each user has his own directory. Generally, the directory name is named after the user's account.│ └── yahboom #user│ ├── Desktop #Desktop│ ├── Documents #Documents│ ├── Downloads #Download│ ├── Music #MUSIC│ ├── Pictures #PICTURES│ ├── Public #Share│ ├── Templates #Templates│ ├── Videos #Video│ ...│ ... ├── lost+found # This directory is usually empty. When the system is shut down illegally, some scattered files are stored here.├── lib # Stores shared library files, including many library files used by programs in /bin and /sbin.├── media # The CD-ROM drive and USB device automatically mounted by the Ubuntu system store temporarily read files.├── mnt # The mount point used as the file system to be mounted.├── opt # As a storage directory for optional files and programs, it is mainly used by third-party developers to easily install and uninstall their software.├── proc # This directory is a virtual directory, which is a mapping of system memory. All processes marked as files are stored here, and cpuinfo stores data on the current working status of the CPU.├── root # This directory is the user home directory of the system administrator, also known as the super privileged user.├── sbin # s means Super User. Here are the system management programs used by system administrators, such as system management, directory query and other key command files.├── srv # Stores service data provided by the system.├── sys # System device and file hierarchy, and provide detailed kernel data information to user programs.├── usr # Stores files and directories related to system users.│ ├── bin # Standard commands for users and administrators│ ├── games # Stores the mini games that come with XteamLinux│ ├── include # Used to store header files needed to develop and compile applications under Linux, c or c++│ ├── lib # Connection libraries for applications and packages│ ├── local # Application directory installed by the system administrator│ ├── sbin # Stores management programs used by the root super user│ └── src # Linux open source code│ └── share # Store shared data│ ...├── var # Files of variable length, especially logged data such as log files and printer files.│ ├── backups│ ├── cache # Application cache directory│ ├── crash # System error message│ ├── log # log file│ ├── mail # e-mail│ └── tmp # Temporary file directory│ ...├── tmp # This directory is used to store some temporary files. All users have read and write permissions to this directory....