mirror of https://github.com/tLDP/LDP
397 lines
24 KiB
Plaintext
397 lines
24 KiB
Plaintext
= Package Management Basics: apt, yum, dnf, zypper, and pkg
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==== Abstract
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This guide is intended as a quick reference for the fundamentals of finding, installing, and upgrading packages on a variety of distributions, and should help you translate that knowledge between systems.
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==== Audience
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For those new to Linux who need a basic understanding of package management.
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==== Original version of this doc
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The original version of this guide can be found at https://www.digitalocean.com/community/tutorials/package-management-basics-apt-yum-dnf-pkg[Digital Ocean].
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==== Revision History
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[cols="^,^,^",]
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|=============================================================================
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|15.1.2016 |v1.0 Converted and edited for TLDP |Jason Evans
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|15.2.2016 |v1.1 Changed format to asciidoc and made corrections |Jason Evans
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|=============================================================================
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==== Contributions
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* https://www.digitalocean.com/community/users/bpb[Brennen Bearnes]
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(original author).
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* http://wiki.tldp.org/Jason%20Evans[Jason Evans] (editor and maintainer for TLDP)
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==== Feedback
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Missing information, missing links, missing characters? Mail it to the maintainer of this document: jsevans _at_ youvegotthe.info
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==== Copyright information
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This work is licensed under a https://creativecommons.org/licenses/by-nc-sa/4.0/[Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License].
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== Introduction
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=== Why was this document written?
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Most modern Unix-like operating systems offer a centralized mechanism for finding and installing software. Software is usually distributed in the form of packages, kept in repositories. Working with packages is known as package management. Packages provide the basic components of an operating system, along with shared libraries, applications, services, and documentation.
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A package management system does much more than one-time installation of software. It also provides tools for upgrading already-installed packages. Package repositories help to ensure that code has been vetted for use on your system, and that the installed versions of software have been approved by developers and package maintainers.
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When configuring servers or development environments, it's often necessary look beyond official repositories. Packages in the stable release of a distribution may be out of date, especially where new or rapidly-changing software is concerned. Nevertheless, package management is a vital skill for system administrators and developers, and the wealth of packaged software for major distributions is a tremendous
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resource.
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=== What do you need?
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This guide covers Debian, Ubuntu, CentOS, Fedora, SuSE, and FreeBSD and will require one of those distributions to be installed.
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NOTE: All of the commands in this guide assume that the user is running the commands as root or with `sudo`.
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=== Package Management Systems: A Brief Overview
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In a Windows environment, programs are packaged in .exe or .msi installers which will then install most of the files needed to run the program. If your computer doesn't have some dependant applications, then the program that you are trying to run will either not install or not run properly. You will then have to scour the internet in order to find the missing required applications or libraries. For example in CentOS 7, in order to install the VIM text editor, I need to add the following packages:
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gpm-libs x86_64 1.20.7-5.el7 base 32 k
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groff-base x86_64 1.22.2-8.el7 base 942 k
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perl x86_64 4:5.16.3-286.el7 base 8.0 M
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perl-Carp noarch 1.26-244.el7 base 19 k
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perl-Encode x86_64 2.51-7.el7 base 1.5 M
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perl-Exporter noarch 5.68-3.el7 base 28 k
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perl-File-Path noarch 2.09-2.el7 base 26 k
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perl-File-Temp noarch 0.23.01-3.el7 base 56 k
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perl-Filter x86_64 1.49-3.el7 base 76 k
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perl-Getopt-Long noarch 2.40-2.el7 base 56 k
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perl-HTTP-Tiny noarch 0.033-3.el7 base 38 k
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perl-PathTools x86_64 3.40-5.el7 base 82 k
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perl-Pod-Escapes noarch 1:1.04-286.el7 base 50 k
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perl-Pod-Perldoc noarch 3.20-4.el7 base 87 k
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perl-Pod-Simple noarch 1:3.28-4.el7 base 216 k
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perl-Pod-Usage noarch 1.63-3.el7 base 27 k
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perl-Scalar-List-Utils x86_64 1.27-248.el7 base 36 k
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perl-Socket x86_64 2.010-3.el7 base 49 k
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perl-Storable x86_64 2.45-3.el7 base 77 k
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perl-Text-ParseWords noarch 3.29-4.el7 base 14 k
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perl-Time-HiRes x86_64 4:1.9725-3.el7 base 45 k
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perl-Time-Local noarch 1.2300-2.el7 base 24 k
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perl-constant noarch 1.27-2.el7 base 19 k
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perl-libs x86_64 4:5.16.3-286.el7 base 687 k
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perl-macros x86_64 4:5.16.3-286.el7 base 43 k
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perl-parent noarch 1:0.225-244.el7 base 12 k
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perl-podlators noarch 2.5.1-3.el7 base 112 k
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perl-threads x86_64 1.87-4.el7 base 49 k
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perl-threads-shared x86_64 1.43-6.el7 base 39 k
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vim-common x86_64 2:7.4.160-1.el7 base 5.9 M
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vim-filesystem x86_64 2:7.4.160-1.el7 base 9.6 k
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which x86_64 2.20-7.el7 base 41 k
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Imagine trying to manually install all of these programs one at a time just to be able to install a text editor! In the early days of Linux, we faced these kinds of problems, however this problem is fixed with package management systems such as apt, yum, and others. In order to install VIM in CentOS 7 today, I simple have to run `yum install vim`. Individaual binary programs, other resources making up the software, along with installation scripts (which tell the package management systems what other packages are required) makeup what we call packages.
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From the list above, you can see gpm-libs. The following files are required before this one package can even be installed:
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/sbin/ldconfig
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libc.so.6(GLIBC_2.15)
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rtld(GNU_HASH)
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/sbin/ldconfig
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libc.so.6(GLIBC_2.15)(64bit)
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libncurses.so.5()(64bit)
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libtinfo.so.5()(64bit)
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rtld(GNU_HASH)
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Package managers simplify all of that. They look at the package that you want to install such as VIM, LibreOffice, etc., then look at what other package it depends on, the dependancies of those packages, and so on; then it downloads them all and installs them.
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This is what it looks like when I install the Midnight Commander package in Ubuntu:
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root@51fa0970b940:/# apt-get install mc
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Reading package lists... Done
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Building dependency tree
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Reading state information... Done
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The following extra packages will be installed:
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libglib2.0-0 libglib2.0-data libgpm2 libssh2-1 libxml2 mc-data sgml-base
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shared-mime-info unzip xml-core
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Suggested packages:
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gpm arj catdvi texlive-binaries dbview djvulibre-bin genisoimage gv
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imagemagick links w3m lynx odt2txt poppler-utils python python-boto
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python-tz xpdf pdf-viewer zip sgml-base-doc debhelper
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The following NEW packages will be installed:
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libglib2.0-0 libglib2.0-data libgpm2 libssh2-1 libxml2 mc mc-data sgml-base
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shared-mime-info unzip xml-core
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0 upgraded, 11 newly installed, 0 to remove and 0 not upgraded.
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Need to get 4022 kB of archives.
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After this operation, 18.5 MB of additional disk space will be used.
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Do you want to continue? [Y/n]
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Get:1 http://archive.ubuntu.com/ubuntu/ trusty-updates/main libglib2.0-0 amd64 2.40.2-0ubuntu1 [1058 kB]
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Get:2 http://archive.ubuntu.com/ubuntu/ trusty-updates/main libxml2 amd64 2.9.1+dfsg1-3ubuntu4.7 [571 kB]
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Get:3 http://archive.ubuntu.com/ubuntu/ trusty/main sgml-base all 1.26+nmu4ubuntu1 [12.5 kB]
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Get:4 http://archive.ubuntu.com/ubuntu/ trusty/main libgpm2 amd64 1.20.4-6.1 [16.5 kB]
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Get:5 http://archive.ubuntu.com/ubuntu/ trusty/universe libssh2-1 amd64 1.4.3-2 [66.3 kB]
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Get:6 http://archive.ubuntu.com/ubuntu/ trusty-updates/main libglib2.0-data all 2.40.2-0ubuntu1 [116 kB]
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Get:7 http://archive.ubuntu.com/ubuntu/ trusty/main shared-mime-info amd64 1.2-0ubuntu3 [415 kB]
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Get:8 http://archive.ubuntu.com/ubuntu/ trusty/main xml-core all 0.13+nmu2 [23.3 kB]
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Get:9 http://archive.ubuntu.com/ubuntu/ trusty/universe mc-data all 3:4.8.11-1 [1134 kB]
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Get:10 http://archive.ubuntu.com/ubuntu/ trusty/universe mc amd64 3:4.8.11-1 [453 kB]
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Get:11 http://archive.ubuntu.com/ubuntu/ trusty-updates/main unzip amd64 6.0-9ubuntu1.5 [157 kB]
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Fetched 4022 kB in 7s (533 kB/s)
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Selecting previously unselected package libglib2.0-0:amd64.
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(Reading database ... 11542 files and directories currently installed.)
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Preparing to unpack .../libglib2.0-0_2.40.2-0ubuntu1_amd64.deb ...
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Unpacking libglib2.0-0:amd64 (2.40.2-0ubuntu1) ...
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Selecting previously unselected package libxml2:amd64.
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Preparing to unpack .../libxml2_2.9.1+dfsg1-3ubuntu4.7_amd64.deb ...
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Unpacking libxml2:amd64 (2.9.1+dfsg1-3ubuntu4.7) ...
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Selecting previously unselected package sgml-base.
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Preparing to unpack .../sgml-base_1.26+nmu4ubuntu1_all.deb ...
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Unpacking sgml-base (1.26+nmu4ubuntu1) ...
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Selecting previously unselected package libgpm2:amd64.
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Preparing to unpack .../libgpm2_1.20.4-6.1_amd64.deb ...
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Unpacking libgpm2:amd64 (1.20.4-6.1) ...
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Selecting previously unselected package libssh2-1:amd64.
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Preparing to unpack .../libssh2-1_1.4.3-2_amd64.deb ...
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Unpacking libssh2-1:amd64 (1.4.3-2) ...
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Selecting previously unselected package libglib2.0-data.
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Preparing to unpack .../libglib2.0-data_2.40.2-0ubuntu1_all.deb ...
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Unpacking libglib2.0-data (2.40.2-0ubuntu1) ...
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Selecting previously unselected package shared-mime-info.
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Preparing to unpack .../shared-mime-info_1.2-0ubuntu3_amd64.deb ...
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Unpacking shared-mime-info (1.2-0ubuntu3) ...
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Selecting previously unselected package xml-core.
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Preparing to unpack .../xml-core_0.13+nmu2_all.deb ...
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Unpacking xml-core (0.13+nmu2) ...
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Selecting previously unselected package mc-data.
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Preparing to unpack .../mc-data_3%3a4.8.11-1_all.deb ...
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Unpacking mc-data (3:4.8.11-1) ...
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Selecting previously unselected package mc.
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Preparing to unpack .../mc_3%3a4.8.11-1_amd64.deb ...
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Unpacking mc (3:4.8.11-1) ...
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Selecting previously unselected package unzip.
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Preparing to unpack .../unzip_6.0-9ubuntu1.5_amd64.deb ...
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Unpacking unzip (6.0-9ubuntu1.5) ...
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Processing triggers for mime-support (3.54ubuntu1.1) ...
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Setting up libglib2.0-0:amd64 (2.40.2-0ubuntu1) ...
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No schema files found: doing nothing.
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Setting up libxml2:amd64 (2.9.1+dfsg1-3ubuntu4.7) ...
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Setting up sgml-base (1.26+nmu4ubuntu1) ...
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Setting up libgpm2:amd64 (1.20.4-6.1) ...
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Setting up libssh2-1:amd64 (1.4.3-2) ...
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Setting up libglib2.0-data (2.40.2-0ubuntu1) ...
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Setting up shared-mime-info (1.2-0ubuntu3) ...
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Setting up xml-core (0.13+nmu2) ...
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Setting up mc-data (3:4.8.11-1) ...
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Setting up mc (3:4.8.11-1) ...
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update-alternatives: using /usr/bin/mcview to provide /usr/bin/view (view) in auto mode
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update-alternatives: using /usr/bin/mcedit to provide /usr/bin/editor (editor) in auto mode
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Setting up unzip (6.0-9ubuntu1.5) ...
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Processing triggers for libc-bin (2.19-0ubuntu6.7) ...
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Processing triggers for sgml-base (1.26+nmu4ubuntu1) ...
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Most package systems are built around collections of package files. A package file is usually an archive which contains compiled binaries and other resources making up the software, along with installation scripts. Packages also contain valuable metadata, including their dependencies, a list of other packages required to install and run them.
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While their functionality and benefits are broadly similar, packaging formats and tools vary by platform:
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[cols="^,<,^",options="header",]
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|===========================================
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|Operating System |Format |Tool(s)
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|Debian |.deb |apt, apt-cache, apt-get, dpkg
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|Ubuntu |.deb |apt, apt-cache, apt-get, dpkg
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|CentOS |.rpm |yum
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|Fedora |.rpm |dnf
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|SuSE |.rpm |zypper
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|FreeBSD |Ports, .txz |make, pkg
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|===========================================
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In Debian and systems based on it, like Ubuntu, Linux Mint, and Raspbian, the package format is the .debfile. APT, the Advanced Packaging Tool, provides commands used for most common operations: Searching repositories, installing collections of packages and their dependencies, and managing upgrades. APT commands operate as a front-end to the lower-level dpkg utility, which handles the installation of individual .deb files on the local system, and is sometimes invoked directly.
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Fedora and enterprise level distributions like Red Hat Enterprise Linux (RHEL), CentOS, and Oracle Linux use RPM files. In CentOS, Oracle, and RHEL, yum is used to interact with both individual package files and repositories. In recent versions of Fedora, yum has been supplanted by dnf, a modernized fork which retains most of yum's interface.
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SuSE also uses RPM files. However, the package management software is known as zypper and has a tightly integrated GUI called YaST. Zypper's command line interface is very similar to yum and YasT can be access from a graphical mode or from the command line.
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FreeBSD's binary package system is administered with the pkg command. FreeBSD also offers the Ports Collection, a local directory structure and tools which allow the user to fetch, compile, and install packages directly from source using Makefiles. It's usually much more convenient to use pkg, but occasionally a pre-compiled package is unavailable, or syou may need to change compile-time options.
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Update Package Lists
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~~~~~~~~~~~~~~~~~~~~
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Most systems keep a local database of the packages available from remote repositories. It's best to update this database before installing or upgrading packages. As a partial exception to this pattern, yum and dnf will check for updates before performing some operations, but you can ask them at any time whether updates are available.
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[cols="^,^",options="header",]
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|=========================================
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|System |Command
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|Debian / Ubuntu |`apt-get update`
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|CentOS |`yum check-update`
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|Fedora |`dnf check-update`
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|SuSE |`zypper refresh`
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|FreeBSD Packages |`pkg update`
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|FreeBSD Ports |`portsnap fetch update`
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|=========================================
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Upgrade Installed Packages
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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Making sure that all of the installed software on a machine stays up to date would be an enormous undertaking without a package system. You would have to track upstream changes and security alerts for hundreds of different packages. While a package manager doesn't solve every problem you'll encounter when upgrading software, it does enable you to maintain most system components with a few commands.
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On FreeBSD, upgrading installed ports can introduce breaking changes or require manual configuration steps. It's best to read /usr/ports/UPDATING before upgrading with portmaster.
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[cols="^,<,^",options="header",]
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|=======================================================================
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|System |Command |Notes
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|Debian / Ubuntu |`apt-get upgrade` |Only upgrades installed packages, where possible.
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| |`apt-get dist-upgrade` |May add or remove packages to satisfy new dependencies.
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|CentOS |`yum update` |
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|Fedora |`dnf upgrade` |
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|SuSE |`zypper update`|
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|FreeBSD Packages |`pkg upgrade` |
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|FreeBSD Ports |`less /usr/ports/UPDATING` |Uses less to view update notes for ports (use arrow keys to scroll, pressq to quit).
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| |`cd /usr/ports/ports-mgmt/portmaster && make install && portmaster -a` |Installs portmaster and uses it to update installed ports.
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|=======================================================================
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Find a Package
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~~~~~~~~~~~~~~
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Most distributions offer a graphical or menu-driven front end to package
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collections. These can be a good way to browse by category and discover
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new software. Often, however, the quickest and most effective way to
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locate a package is to search with command-line tools.
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[cols="^,<,^",options="header",]
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|=======================================================================
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|System |Command |Notes
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|Debian / Ubuntu |`apt-cache search search_string` |
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|CentOS |`yum search search_string` |
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| |`yum search all search_string` |Searches all fields, including description.
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|Fedora |`dnf search search_string` |
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| |`dnf search all search_string` |Searches all fields, including description.
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|SuSE |`zypper se search_string` |
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|FreeBSD Packages |`pkg search search_string` |Searches by name.
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| |`pkg search -f search_string` |Searches by name, returning full descriptions.
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| |`pkg search -D search_string` |Searches description.
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|FreeBSD Ports |`cd /usr/ports && make search name=package` |Searches by name.
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| |`cd /usr/ports && make search key=search_string` |Searches comments, descriptions, and dependencies.
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|=======================================================================
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View Info About a Specific Package
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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When deciding what to install, it's often helpful to read detailed descriptions of packages. Along with human-readable text, these often include metadata like version numbers and a list of the package's dependencies.
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[cols="^,<,^",options="header",]
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|=======================================================================
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|System |Command |Notes
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|Debian / Ubuntu |`apt-cache show package` |Shows locally-cached info about a package.
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| |`dpkg -s package` |Shows the current installed status of a package.
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|CentOS |`yum info package` |
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| |`yum deplist package` |Lists dependencies for a package.
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|Fedora |`dnf info package` |
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| |`dnf repoquery -\/-requires package` |Lists dependencies for a package.
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|SuSE|`zypper info search_string` |Lists dependencies for a package.
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|FreeBSD Packages |`pkg info package` |Shows info for an installed package.
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|FreeBSD Ports |`cd /usr/ports/category/port && cat pkg-descr` |
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|=======================================================================
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Install a Package from Repositories
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Once you know the name of a package, you can usually install it and its dependencies with a single command. In general, you can supply multiple packages to install simply by listing them all.
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[cols="^,<,^",options="header",]
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|=======================================================================
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|System |Command |Notes
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|Debian / Ubuntu |`apt-get install package` |
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| |`apt-get install package1 package2 ...` |Installs all listed packages.
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| |`apt-get install -y package` |Assumes "yes" where apt would usually prompt to continue.
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|CentOS |`yum install package` |
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| |`yum install package1 package2 ...` |Installs all listed packages.
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| |`yum install -y package` |Assumes "yes" where yum would usually prompt to continue.
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|Fedora |`dnf install package` |
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| |`dnf install package1 package2 ...` |Installs all listed packages.
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| |dnf install -y package |Assumes "yes" where dnf would usually prompt to continue.
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|SuSE|`zypper install`|
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|FreeBSD Packages |`pkg install package` |
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| |`pkg install package1 package2 ...` |Installs all listed packages.
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|FreeBSD Ports |`cd /usr/ports/category/port && make install` |Builds and installs a port from source.
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|=======================================================================
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Install a Package from the Local Filesystem
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Sometimes, even though software isn't officially packaged for a given operating system, a developer or vendor will offer package files for download. You can usually retrieve these with your web browser, or viacurl on the command line. Once a package is on the target system, it can often be installed with a single command.
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On Debian-derived systems, dpkg handles individual package files. If a package has unmet dependencies, gdebi can often be used to retrieve them from official repositories.
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On CentOS and Fedora systems, yum and dnf are used to install individual files, and will also handle needed dependencies.
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[cols="^,<,^",options="header",]
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|=======================================================================
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|System |Command |Notes
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|Debian / Ubuntu |`dpkg -i package.deb` |
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| |`apt-get install -yg debi && gdebi package.deb` |Installs and uses gdebi to install package.deb and retrieve any missing dependencies.
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|CentOS |`yum install package.rpm` |
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|Fedora |`dnf install package.rpm` |
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|SuSE|`zypper install package.rpm`|
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|FreeBSD Packages |`pkg add package.txz` |
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| |`pkg add -f package.txz` |Installs package even if already installed.
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|=======================================================================
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Remove One or More Installed Packages
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Since a package manager knows what files are provided by a given package, it can usually remove them cleanly from a system if the software is no longer needed.
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[cols="^,<,^",options="header",]
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|=======================================================================
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|System |Command |Notes
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|
|Debian / Ubuntu |`apt-get remove package` |
|
|
| |`apt-get autoremove` |Removes unneeded packages.|
|
|
|CentOS |`yum remove package` |
|
|
|Fedora |`dnf erase package` |
|
|
|FreeBSD Packages |`pkg delete package` |
|
|
| |`pkg autoremove` |Removes unneeded packages.
|
|
|SuSE|`zypper rm package`|
|
|
|FreeBSD Ports |`pkg delete package` |
|
|
| |`cd /usr/ports/path_to_port && make deinstall` |De-installs an installed port.
|
|
|=======================================================================
|
|
|
|
Get Help
|
|
~~~~~~~~
|
|
|
|
In addition to web-based documentation, keep in mind that Unix manual pages (usually referred to as man pages) are available for most commands from the shell. To read a page, use man:
|
|
|
|
----------
|
|
$ man page
|
|
----------
|
|
|
|
In man, you can navigate with the arrow keys. Press / to search for text within the page, and q to quit.
|
|
|
|
[cols="^,<,^",options="header",]
|
|
|=======================================================================
|
|
|System |Command |Notes
|
|
|Debian / Ubuntu |`man apt-get` |Updating the local package database and working with packages.
|
|
| |`man apt-cache` |Querying the local package database.
|
|
| |`man dpkg` |Working with individual package files and querying
|
|
installed packages.
|
|
|CentOS |`man yum` |
|
|
|Fedora |`man dnf` |
|
|
|SuSE|`man zypper`|
|
|
|FreeBSD Packages |`man pkg` |Working with pre-compiled binary packages.
|
|
|FreeBSD Ports |`man ports` |Working with the Ports Collection.
|
|
|=======================================================================
|
|
|
|
Conclusion and Further Reading
|
|
------------------------------
|
|
|
|
This guide provides an overview of basic operations that can be
|
|
cross-referenced between systems, but only scratches the surface of a
|
|
complex topic. For greater detail on a given system, you can consult the
|
|
following resources:
|
|
|
|
1. https://www.digitalocean.com/community/tutorials/ubuntu-and-debian-package-management-essentials[This
|
|
guide] covers Ubuntu and Debian package management in detail.
|
|
2. There's an https://www.centos.org/docs/5/html/yum/[official CentOS guide to managing software with yum].
|
|
3. There's a https://fedoraproject.org/wiki/Dnf[Fedora wiki page about dnf], and an https://dnf.readthedocs.org/en/latest/index.html[official manual for dnf itself]
|
|
4. https://www.digitalocean.com/community/tutorials/how-to-manage-packages-on-freebsd-10-1-with-pkg[This guide] covers FreeBSD package management using pkg.
|
|
5. The https://www.freebsd.org/doc/handbook/[FreeBSD Handbook] contains
|
|
a https://www.freebsd.org/doc/handbook/ports-using.html[section on using
|
|
the Ports Collection].
|
|
6. http://doc.opensuse.org/documentation/html/openSUSE_114/opensuse-reference/cha.sw_cl.html[OpenSuSE documentation for Zypper] and http://doc.opensuse.org/documentation/html/openSUSE_114/opensuse-reference/cha.onlineupdate.you.html[YaST]. |