Package managers are tools to automate the process of installing, upgrading, uninstalling or configuring software on Linux. Package managers are part of the operating system and they use a single database for installation and a single packet format, for example: rpm or deb. They are also responsible for checking the digital signature, and dependency resolution for updates.
Currently, the vast majority of Linux operating systems have a intuitive and easy to use graphics interface for package managers. For this reason, we discuss some basic features of the best-known command-line packet managers, which commonly generate doubts.
YUM (Yellow dog Updater, Modified) package manager
This is the package manager for RPM-based Linux systems as Fedora, Redhat, CentOS and its derivatives e.g. BlueCat. Some of the most common uses are:
yum install package # download and install a package and its dependencies yum localinstall package.rpm # install a previously downloaded package and its dependencies yum update # update all installed packages yum update package # update a package yum remove package # remove a package yum list # list all installed packages yum search package # find a package in the repository yum clean all # remove cache packages, headers and others
Dpkg package manager
This is the basis of Debian's package management system, and therefore, it is also used by distributions like Ubuntu and its derivatives. Some examples are:
dpkg -i package.deb # install a package dpkg -r package # remove a package dpkg -l # list all installed packages dpkg -l | grep httpd # show all packages with the name "httpd" dpkg -s package # obtain information of installed package dpkg -L package # file list of an installed package dpkg -S /bin/ping # verify which file a package belongs to
APT and APTITUDE package managers
APT (Advanced Packaging Tool) is not really a program, but a C++ library that is used by several programs, e.g. apt-get or apt-cache. On the other hand, aptitude is an interface for apt that facilitate search systems and dependence resolutions to users. These package managers have commands and options similar to those already described, as we can see below:
apt-get install package # install a package apt-cdrom install package # install a package from cdrom apt-get update # update the list of packages apt-get upgrade # update all installed packages apt-get remove package # remove a package apt-get check # verify dependencies apt-get clean # clean cache apt-cache search package # list packages that corresponds to "package" aptitude search paquete # looking for a package by its name aptitude show paquete | less # display information about a package aptitude install paquete1 paquete2 … # install multiple packages and their dependencies aptitude remove paquete # remove a package aptitude purge paquete # remove a package and clean cache aptitude clean # clean cache
PD: Do you like cows? writes in a terminal: apt-get moo
Luis Sequeira is an IT professional with experience in cloud environments, quality of service and network traffic analysis, who loves looking for solutions to engineering challenges, share knowledge. At work, the main challenge is to integrate different network and software technologies to provide solution in a wide range of areas, e.g., virtual network functions, machine learning, autonomous driving, robotics and augmented reality.Website: https://www.luissequeira.com
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