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.