Basic use of Yum under Linux

1. Introduction

Yum:yellowdog Update modifier,rpm's front-end program, used to resolve package dependencies, can locate packages among multiple libraries, up2date alternative tools.

Yum's basic workgroup needs to depend on the Yum repository: Yum repository (yum repo)

Storage of many RPM packages and related metadata files for packages (placed in a specific directory: Repodata);

2. Yum Client configuration file

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

/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} defaults to 1

GPGCHECK={1|0} default 1

Gpgkey=url

Enablegroups={1|0}

Failovermethod={roundrobin|priority} defaults to Roundrobin, which means random selection

cost= Default 1000

Cases:

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3. Yum Store (yum repo)

In general, warehouses are file servers that can be serviced through the following Parties:

ftp://

/ http

nfs://

file:///

Create a yum warehouse: Createrepo [Options] <directory>

4. Use of Yum related commands

Yum [options] [command] [pckage ...]

Yum-config-manager--ADD-REPO=FILE:///MISC/CD generating Warehouse files Misc_cd.repo

Yum-config-manager--disable "MISC_CD" Disable the Warehouse

Yum-config-manager--enable "MISC_CD" Enable warehouse

Yum repolist [All | enabled | disabled] Show warehouse list

Yum List Display Package

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

#yum List {avaliable | installed | updates} [glob_exp1][...]

To install the package:

Yum install Package1 [Package2] [...]

Yum Reinstall Packge1 [Package2] [...] re-install

Upgrade Package:

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

Yum downgrade Package1 [package2][...] downgrade

Check for available upgrades:

Check-update

To uninstall a package:

Remove | Erase Package1 [package2][...]

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:

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

Build cache:

Yum Makecache

Search:

Search string1 [string2] [...] searches for packages and summary information with the specified keywords;

View the capabilities that the specified package depends on:

Yum deplist package1 [Package2] [...]

View Yum things history:

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

Yum history

Yum History Info 6 View more information about 6

Yum History undo 6 undo Record 6 Operation

To install and upgrade the local package:

Localinstall Rpmfile1 [rpmfile2][...]

Localupdate Rpmfile1 [rpmfile2][...]

Note: In order to be compatible with existing commands, use Install,update directly after 6.0

Package group Management Related commands:

Groupinstal group1 [group2][...]

Groupupdate group1 [group2][...]

grouplist [hidden] [groupwildcard][...]

Groupremove group1 [group2][...]

GroupInfo group1 [...]

Yum command-Line options:

--nogpgcheck: No GPG check

-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

Log file:/var/log/yum.log

5. Example: Use CD as local Yum warehouse (CentOS6.7 system)

Note: Because Repodata is present by default in the disc directory, you do not have to create the Yum library manually, and if you use a local directory, you should use Createrepo [options] <directory> command creation.

① mounting discs to a directory

#mount/dev/cdrom/media/cdrom

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② Creating a configuration file

#vim/etc/yum.repo.d/centos6.repo

[CentOS6]

Name=centos6-yum

Baseurl=file:///media/cdrom

gpgcheck=0

Enabled=1

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③ using Yum repolist to see if the creation was successful

#yum repolist

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④ test: Installing the tree program with Yum

#yum-y Install tree

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Basic use of Yum under Linux