What is the sock file in linux

In Linux, a sock file is a representation of a Unix domain socket, used for communication between processes running on the same machine. Unix domain sockets do not rely on the network protocol stack , but directly creates a file in the local file system to represent the socket. This file is called a sock file and is usually located in the "/tmp" directory.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

In Linux, a sock file is a representation of a Unix Domain Socket. Unix domain sockets are a special socket type used for communication between processes running on the same machine.

Unlike traditional network sockets, Unix domain sockets do not rely on the network protocol stack, but directly create a file in the local file system to represent the socket. This file is called a sock file, and it is usually located in the /tmp directory, but can be in other locations.

Unix domain sockets provide an efficient, low-latency inter-process communication mechanism suitable for communication needs between local processes. It avoids the overhead of transmitting data through the network protocol stack, and because it is based on the file system, the permission control for inter-process communication is more flexible.

Sock files play an important role in inter-process communication and can be used to implement data exchange, shared memory and synchronization operations between processes. In Linux systems, you can use socket system calls and related library functions to create and operate Unix domain sockets to achieve inter-process communication.

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