CentOS7使用yum指令报错 已加载插件：fastestmirror
没有安装wget的看我另一篇博客：
已安装wget继续往下看
报错信息如下：
已加载插件：fastestmirror, langpacks File contains no section headers. file: file:///etc/yum.repos.d/con
安装好CenOS7后，自带的yum不能直接使用，使用会出现如下问题：
已加载插件：fastestmirror, langpacks File contains no section headers. file: file:///etc/yum.repos.d/convirt.repo, line: 1 "<html><head><title>Loading...</title></head><body><script type='text/javascript'>window.location.replace('http://www.convirture.c
原因是没有配置yum源，修改/etc/yum.repos.d/CenOS-Base.repo文件内容如下：
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
[base]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
如果不行，这样，删除原有的文件：
rm -f /etc/yum.repos.d/CentOS-Base.repo
然后重新下载阿里的：
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
清理缓存：
yum clean all
ps:如果上述方法没有解决，尝试下面：
删除yum.repos.d目录下所有文件
rm -f /etc/yum.repos.d/*
然后重新下载阿里的：
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
清理缓存：
yum clean all
测试下载安装：
yum install gcc安装完成！
感谢大家的阅读，觉得有所帮助的朋友点点关注点点赞！
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