Linux Learning notes-the Yum of package management

YUM

Yum is the front-section manager of the RPM Package Manager. Yum main function is more convenient to add/remove/update RPM package, automatically solve the dependency problem of the package, easy to manage a large number of system update problems.

The Yum operation is based on the Yum repository

Yum Repository:yum Repo Yum Warehouse

Stores a number of RPM packages, as well as the relevant metadata files for packages (placed in a specific directory: Repodata);

File server:

ftp://

/HTTP

nfs://

file:///

Configuration of Yum

Configuration file

/ETC/YUM.CONF: Providing public configuration for all warehouses

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/etc/yum.repos.d/*.repo: Provides configuration for the point of the warehouse

Definition of Warehouse point:

[Repositoryid]

Name=some name for this repository

baseurl=url://path/to/repository/

Enabled={1|0}

Gpgcheck={1|0}

Gpgkey=url

Enablegroups={1|0}

Failovermethod={roundrobin|priority}

The default is: Roundrobin, meaning random selection;

cost=

Default is 1000

Usage of the Yum command:

Yum [options] [command] [package ...]

command is one of:

* Install Package1 [Package2] [...]

* Update [PACKAGE1] [Package2] [...]

* Update-to [Package1] [Package2] [...]

* Check-update

* upgrade [Package1] [Package2] [...]

* Upgrade-to [Package1] [Package2] [...]

* Distribution-synchronization [Package1] [Package2] [...]

* Remove | Erase Package1 [Package2] [...]

* List [...]

* Info [...]

* provides | Whatprovides Feature1 [Feature2] [...]

* Clean [Packages | metadata | expire-cache | rpmdb | plugins | all]

* Makecache

* Groupinstall group1 [group2] [...]

* Groupupdate group1 [group2] [...]

* grouplist [hidden] [Groupwildcard] [...]

* Groupremove group1 [group2] [...]

* GroupInfo group1 [...]

* Search string1 [string2] [...]

* Shell [filename]

* RESOLVEDEP DEP1 [DEP2] [...]

* Localinstall Rpmfile1 [rpmfile2] [...]

(Maintained for legacy reasons Only-use install)

* Localupdate Rpmfile1 [rpmfile2] [...]

(Maintained for legacy reasons Only-use Update)

* Reinstall Package1 [Package2] [...]

* Downgrade Package1 [Package2] [...]

* Deplist Package1 [Package2] [...]

* Repolist [all|enabled|disabled]

* Version [all | installed | available | group-* | nogroups* | grouplist | groupinfo]

* History [Info|list|packages-list|packages-info|summary|addon-info|redo|undo|rollback|new|sync|stats]

* Check

* Help [command]

Show Warehouse list:

repolist [all|enabled|disabled]

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Show Packages:

List

# yum list [all | glob_exp1] [GLOB_EXP2] [...]

# Yum list {available|installed|updates} [GLOB_EXP1] [...]

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To install the package:

Install package1 [Package2] [...]

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Reinstall Package1 [Package2] [...] (reinstall)

Upgrade Package:

Update [package1] [Package2] [...]

downgrade Package1 [Package2] [...] Downgrade

Check for available upgrades:

Check-update

To uninstall a package:

Remove | Erase Package1 [Package2] [...]

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To view the package information:

info [...]

View which package is provided by the specified attribute (which can be a file):

provides | Whatprovides Feature1 [Feature2] [...]

To clean up the local cache:

Clean [Packages | metadata | expire-cache | rpmdb | plugins | all]

Build cache:

Makecache

Search:

Search string1 [string2] [...]

Search for the package name and summary information with the specified keywords;

View the capabilities that the specified package depends on:

deplist package1 [Package2] [...]

View Yum Transaction history:

History [Info|list|packages-list|packages-info|summary|addon-info|redo|undo|rollback|new|sync|stats]

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To install and upgrade the local package:

* Localinstall Rpmfile1 [rpmfile2] [...]

(Maintained for legacy reasons Only-use install)

* Localupdate Rpmfile1 [rpmfile2] [...]

(Maintained for legacy reasons Only-use Update)

Related commands for package group management:

* Groupinstall group1 [group2] [...]

* Groupupdate group1 [group2] [...]

* grouplist [hidden] [Groupwildcard] [...]

* Groupremove group1 [group2] [...]

* GroupInfo group1 [...]

How to use a disc as a local yum repository:

(1) Mount the disc to a directory such as/media/cdrom

# mount-r-T Iso9660/dev/cdrom/media/cdrom

(2) Creating a configuration file

[CentOS7]

name=

baseurl=

gpgcheck=

enabled=

Yum command-Line options:

--nogpgcheck: No GPG check is allowed;

-y: Auto Answer "yes";

-Q: Silent mode;

--disablerepo=repoidglob: Temporarily disables the repo specified here;

--enablerepo=repoidglob: Temporarily enable the repo specified here;

--noplugins: Disable all plugins;

The variables available in the Yum repo configuration file:

$releasever: The major version number of the current OS release version;

$arch: platform;

$basearch: basic platform;

$YUM 0-$YUM 9

Example: http://mirrors.magedu.com/centos/$releasever/$basearch/os

To create a yum repository:

Createrepo [options] <directory>

Linux Learning notes-the Yum of package management