What is APT?
APT(Advanced Package Tool), is a free-software user interface that works with core libraries to handle the installation and removal of software on Debian, Ubuntu, and related Linux distributions. APT simplifies the process of managing software on Unix-like computer systems by automating the retrieval, configuration and installation of software packages, either from precompiled files or by compiling source code.
Which 2 usages of APT are?
Basically, there are 2 usages for APT, which are installing software and using for update, upgrade and dist-upgrade. To use APT for installing software, there are 4 steps to do. First, you need to add repository and update the sources. Then, install a package using apt-get and apt-get install; Besides, for using APT to update, upgrade and dist-upgrade, it is more specific and professional. Update is used to resynchronize the package index files from their sources. Upgrade is used to install the newest versions of all packages currently installed on the system from the sources enumerated in /etc/apt/sources.list. Dist-upgrade in addition to performing the function of upgrade, also intelligently handles changing dependencies with new versions of packages
Other meaning for APT
APT also stands for Advanced Persistent Threat. An advanced persistent threat (APT) is a stealthy threat actor, typically a nation state or state-sponsored group, which gains unauthorized access to a computer network and remains undetected for an extended period. In recent times, the term may also refer to non-state-sponsored groups conducting large-scale targeted intrusions for specific goals. There are many APT groups all over the world, like China, Iran, Israel, North Korea, Russia, United States, Uzbekistan and Vietnam.
