What is ‘sudo’

• sudo (/ˈsuːduː/ or /ˈsuːdoʊ/) is a program for Unix-like computer operating systems that allows users to run programs with the security privileges of another user, by default the superuser. It originally stood for "superuser do" as the older versions of sudo were designed to run commands only as the superuser.

A beginner's guide to understanding sudo on Ubuntu

What’s the Difference Between Sudo and Su in Linux?

Package Management Basics: apt, yum, dnf, pkg

• How to Install Software in Debian Linux (and Ubuntu)• # apt install <packagename>

• Finding and installing Linux applications (in Fedora)• # dnf install <packagename>

• 20 Linux YUM (Yellowdog Updater, Modified) Commands for Package Management (in CentOS)• # yum install <packagename>

Package Management Systems

Update Package Lists

Upgrade Installed Packages

Find a Package

View Info About a Specific Package

Install a Package from Repositories

Install a Package from the Local Filesystem

Remove One or More Installed Packages

The apt Command

Get Help

Further Reading

•This guide covers Ubuntu and Debian package management in detail.•There's an official CentOS guide to managing software with yum.•There's a Fedora wiki page about dnf, and an official manual for dnf itself.•This guide covers FreeBSD package management using pkg.•The FreeBSD Handbook contains a section on using the Ports Collection.