Welcome to MicroROS Robot repository

2.Ubuntu file system

2.1 Ubuntu Overview

Ubuntu is a Linux operating system mainly based on desktop applications.

2.2 Ubuntu file system

Ubuntu has only one root directory [/], and all files are under this directory

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├── 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.
...