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Yum (Yellow dog Updater, Modified) is a Shell front-end package manager in Fedora and RedHat as well as in CentOS. Based on RPM package management, RPM packages can be downloaded and installed automatically from designated servers, dependencies can be automatically dealt with, and all dependent software packages can be installed at one time without tedious downloading and installation.

After installing the operating system (except as if minimized), you will have the following files in the / etc/yum.repo.d/ directory.

CentOS-Base.repo CentOS-Debuginfo.repo CentOS-Media.repo CentOS-Vault.repo

CentOS-CR.repo CentOS-fasttrack.repo CentOS-Sources.repo

This is the configuration file of the system source and can be used directly without modifying its contents and network access. Of course, you can also download and use other network sources manually.

Download the network yum repository

# wget http://mirrors.aliyun.com/repo/Centos-7.repo-C / etc/yum.repo.d/

# wget http://mirrors.aliyun.com/repo/epel-7.repo-C / etc/yum.repo.d/

# yum clean all / / clear yum cache

# yum repolist / / list installation packages

Configure the local yum repository

Generally speaking, the package in the CD image can meet our basic use.

Here are the steps for building a local yum repository:

Mkdir-p / xxx/xxx / / create a CD mount point, and of course you can copy CD files to that path.

Mount / dev/sr0 / xxx/xxx / / Mount CD

Vim / etc/yum.repo.d/xxx.repo

[xxx]

Name=xxx

Baseurl= file:///xxx/xxx / / File path

Enabled=1 / / whether to enable the source (1 on, 0 off). The system enables the source application by default, and you can leave this item unwritten.

Gpgcheck=0 / / whether to authenticate the source with key (1 on, 0 off). Because it is a CD source, I turn off authentication.

# yum clean all

# yum repolist

Use yum

Install / update

Format: yum install/update package

Install / / installation

-- installroot=/some/path / / install the software in / some/path instead of using the default path.

Update / / Update

-y / / avoid confirmation prompts during installation

List / / list package

Remove / / Delete

Deplist / / list associated packages

Common commands:

Yum-y install package

Yum-y update package

Yum clean all

Yum repolist

Yum deplist package

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