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Linux Beginner

What is Package Manager?

A tool that automates the process of installing, updating, configuring, and removing software packages.

Package managers handle software dependencies, versioning, and installation from repositories. Popular examples include APT (Debian/Ubuntu), DNF/YUM (Fedora/RHEL), Pacman (Arch Linux), and Zypper (openSUSE).

They maintain a database of installed packages and their dependencies, making it easy to keep systems updated and resolve conflicts.

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A piece of code that can be loaded into the kernel at runtime to extend functionality without rebooting, such as device drivers and filesystems.
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Interactive process viewers that display real-time system resource usage including CPU, memory, and running processes.
Journalctl
A command-line tool for querying and viewing logs collected by systemd's journal logging system.
Iptables
The traditional Linux firewall tool that filters network packets using configurable chains of rules organized in tables.
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A terminal multiplexer that allows running multiple terminal sessions within a single window, with detach/reattach capability.
Nohup
A command that runs a process immune to hangup signals, allowing it to continue after the terminal session ends.
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