Linux Beginner

What is Pipe?

A mechanism that connects the output of one command directly to the input of another, enabling command chaining.

Pipes (|) are fundamental to the Unix philosophy of small, composable tools. For example, cat log.txt | grep ERROR | wc -l counts error lines in a log file by chaining three simple commands.

Named pipes (FIFOs) are special files that allow communication between processes. Pipes enable powerful data processing workflows without creating intermediate files.

Related Terms

SSH (Secure Shell)

A cryptographic network protocol for secure remote login and command execution over an unsecured network.

Network Namespace

A Linux kernel feature that provides isolated network stacks with independent interfaces, routing tables, and firewall rules.

The systemd journal daemon that collects and stores log data from services, the kernel, and boot messages in a structured binary format.

A running instance of a program, with its own memory space, process ID, and system resources.

A Linux kernel feature that limits, accounts for, and isolates resource usage of process groups.

A background process that runs continuously on a system, typically providing services like web serving or logging.

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