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Linux Beginner

What is Shell?

A command-line interface that interprets user commands and passes them to the operating system for execution.

A shell provides a text-based interface for interacting with the operating system. Popular shells include Bash (Bourne Again Shell), Zsh, and Fish. The shell reads commands, interprets them, and communicates with the kernel to execute them.

Shells also support scripting, allowing users to automate repetitive tasks by writing sequences of commands in shell scripts.

Related Terms

Process
A running instance of a program, with its own memory space, process ID, and system resources.
Procfs (/proc)
A virtual filesystem in Linux that provides an interface to kernel data structures, exposing process and system information as files.
Top/Htop
Interactive process viewers that display real-time system resource usage including CPU, memory, and running processes.
Crontab Syntax
The time specification format used in cron job scheduling, with five fields defining minute, hour, day of month, month, and day of week.
Nohup
A command that runs a process immune to hangup signals, allowing it to continue after the terminal session ends.
Package Manager
A tool that automates the process of installing, updating, configuring, and removing software packages.
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