Linux-添加centos镜像源

镜像地址

http://man.linuxde.net/download/CentOS
http://mirrors.btte.net/centos/7/isos/x86_64/
http://mirrors.cn99.com/centos/7/isos/x86_64/
http://mirrors.sohu.com/centos/7/isos/x86_64/
http://mirrors.aliyun.com/centos/7/isos/x86_64/
http://centos.ustc.edu.cn/centos/7/isos/x86_64/
http://mirrors.neusoft.edu.cn/centos/7/isos/x86_64/
http://mirror.lzu.edu.cn/centos/7/isos/x86_64/
http://mirrors.163.com/centos/7/isos/x86_64/
http://ftp.sjtu.edu.cn/centos/7/isos/x86_64/

源安装

开启和关闭方法

• 进入用户商店，手动进行开启和关闭
• 命令行终端开启或者关闭，修改enable参数即可

终端进入镜像仓库

• cd /etc/yum.repos.d

查看现在支持哪些源

• ls /etc/yum.repos.d/
• yum repolist

添加epel源

• EPEL (Extra Packages for Enterprise Linux)是基于Fedora的一个项目，为“红帽系”的操作系统提供额外的软件包，适用于RHEL、CentOS和Scientific Linux.

安装命令

• sudo yum install epel-release
• yum search epel*

清除缓存安装包的命令

• yum clean all

缓存安装的软件包

• yum makecache

清华大学开源软件镜像站

• https://mirrors.tuna.tsinghua.edu.cn/help/rpmfusion/
• https://mirrors.tuna.tsinghua.edu.cn/help/epel/

添加第三方仓库rpmfusion源

• RPM Fusion 是 Fedora 的第三方应用程序的主要来源。RPM Fusion 是由三个项目（Dribble、Freshrpms 和 Livna）合并而成的。

• 查看系统信息

uname -a
cat /etc/os-release
cat /etc/centos-release

• rpmfusion源地址：https://rpmfusion.org/Configuration
  • 支持直接界面下安装，也可以是命令行安装
  • dnf config-manager命令添加、启用和禁用软件源仓库

# RHEL or compatible like CentOS
- sudo dnf install --nogpgcheck https://dl.fedoraproject.org/pub/epel/epel-release-latest-$(rpm -E %rhel).noarch.rpm
- sudo dnf install --nogpgcheck https://mirrors.rpmfusion.org/free/el/rpmfusion-free-release-$(rpm -E %rhel).noarch.rpm https://mirrors.rpmfusion.org/nonfree/el/rpmfusion-nonfree-release-$(rpm -E %rhel).noarch.rpm
# CentOS Steam 8 requires an additional step
- sudo dnf config-manager --enable powertools
# CentOS 8 (older version) used a case sensitive name for the PowerTools repository
- sudo dnf config-manager --enable PowerTools
# RHEL 8 requires an additional step
- sudo subscription-manager repos --enable "codeready-builder-for-rhel-8-$(uname -m)-rpms"

替换官方源地址

• http://isoredirect.centos.org/centos/8-stream/isos/x86_64/
• http://isoredirect.centos.org/

baseurl=http://mirror.centos.org/$contentdir/$stream/AppStream/$basearch/os/
baseurl=http://mirror.centos.org/centos/8/AppStream/x86_64/os/

替换epel\repmfusion源

• rpmfusion类似，都是要查看具体镜像网站地址的写法，然后修改本地的repo

vi epel.repo

Enable snapd

• 【参考链接】https://snapcraft.io/install/v4l2tools/centos#:~:text=To install v4l2tools%2C simply use the,following command%3A sudo snap install v4l2tools
• sudo yum install epel-release
• sudo yum install snapd
• sudo systemctl enable --now snapd.socket
• sudo ln -s /var/lib/snapd/snap /snap
• sudo snap install v4l2tools(如果报错：too early for operation, device not yet seeded or device model not acknowledged，尝试输入sudo setenforce 0)
• 如果有需要可以安装sudo snap install v4l2tools