Detailed explanation of the update command for software (library) under Linux

When installing packages on an Ubuntu server, you often use sudo apt-get install package name or sudo pip install package name. What is the difference between the two?

1. Difference

pip is used to install all Python dependency packages from PyPI (https://www.python.org/), and can choose to install any previous version of dependency packages uploaded on PyPI, which I personally think are Python-related packages and third-party packages and various versions;

apt-get can be used to install software, update sources, and can also be used to update typical dependency packages from Ubuntu (https://launchpad.net/ubuntu). Typical installation means that it only installs a single version (the latest release, or the most recent one), and we cannot decide the version of the dependency package we want to install or choose a previous version.

Personally, I think they are easy to distinguish: after all, one is updating the system-level package, and the other is updating a programming language-level package (library).

2. Installation and application

apt-get can be used directly in the following format:

$ sudo apt-get install/delete package
$ sudo apt-get -f install #Repair installation$ sudo apt-get dist-upgrade #Upgrade system$ sudo apt-get upgrade #Update installed packages$ apt-get source package #Download the source code of the package$ sudo apt-get build-dep package #Install related compilation environment$ sudo apt-get clean && sudo apt-get autoclean #Clean up useless packages

pip needs to be installed before it can be used. The installation process is as follows (applicable to Ubuntu 10.10 and above), using the format: pip install package.

$ sudo apt-get install python-pip python-dev build-essential
$ sudo pip install --upgrade pip

Installing Python library under Linux

sudo apt-get install python-numpy 
sudo apt-get install python-scipy 
sudo apt-get install python-matplotlib 
sudo apt-get install python-pip

other

pip list lists all libraries

pip show torch View library information

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