Operating systems

1、CentOS

Package format: rpm package

Installation software: yum

Features: A replica of Red Hat Enterprise Linux (RHEL).

Note: CentOS officials have planned to stop maintaining the CentOS Linux project

2、Debian

Package format: deb package

Installed software: aptitude

Features: Relatively stable system

3、Ubuntu

Package format: deb package

Installation software: apt-get

Features: more user-friendly system configuration

      More aggressive software updates

      More novice friendly, better ease of use and easier to get started