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Linux commands are the commands used to manage the Linux system. For the Linux system, whether it is the central processing unit, memory, disk drives, keyboard, mouse, or users, everything is a file. The commands for managing the Linux system are the core of its normal operation. One key point to note is that, unlike DOS commands, Linux commands (including file names, etc.) are case-sensitive.
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Linux commands can be divided into internal commands and external commands: Internal commands are loaded into memory when the system starts, so they reside in memory and have high execution efficiency. External commands are software functions of the system, which are read into memory from the hard disk only when needed by the user.
External commands are also known as file system commands; they are programs outside of the bash shell and are not part of the shell. External commands are generally located in /bin, /usr/bin, /sbin, or /usr/sbin.
Internal commands are integrated with the shell; they exist as components of shell tools and do not need to spawn a subprocess to execute, nor do they require opening a program file. We should also note that many commands have multiple implementations (for example, the same command can be both an internal command and an external command).
Online Query and Help Commands
File and Directory Operation Commands
File Viewing and Content Processing Commands
File Compression and Decompression Commands
Information Display Commands
File Search Commands
User Management Commands
Basic Network Operation Commands
Advanced Network Operation Commands
Commands Related to Disks and File Systems
Commands Related to System Permissions and User Authorization
Commands to View System User Login Information
Built-in Commands and Others
System Management and Performance Monitoring Commands
Shutdown / Restart / Logout and View System Information Commands
Process Management Related Commands
Download 1: OpenCV-Contrib Extension Module Chinese Tutorial
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