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What is Process?

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

Every running program creates at least one process. Each process has a unique PID (Process ID), its own memory space, environment variables, and file descriptors. Processes can spawn child processes using fork().

Tools like ps, top, and htop display running processes. Signals like SIGTERM (graceful stop) and SIGKILL (force stop) control process behavior.

Related Terms

AppArmor
A Linux security module that restricts program capabilities using per-application profiles, simpler to configure than SELinux.
Chroot
A mechanism that changes the apparent root directory for a process and its children, creating an isolated filesystem view.
Disk Quota
A system for limiting the amount of disk space or number of files that individual users or groups can consume on a filesystem.
Mount Point
A directory in the filesystem where a storage device or partition is attached and made accessible.
Wget
A command-line utility for downloading files from the web, supporting HTTP, HTTPS, and FTP protocols.
Nftables
The modern Linux packet filtering framework that replaces iptables with a unified, more efficient rule-processing architecture.
View All Linux Terms โ†’