网站备案 停站,镇江网页设计,泸州市往建局建设银行网站名称,外网浏览网站1、先查DNS 先测试公共 IP 连通性#xff08;确保网络能出外网#xff09; ping -c 4 223.5.5.5 如果联不通则考虑重新配置DNS # 备份原有配置 cp /etc/resolv.conf /etc/resolv.conf.bak# 清空并写入可靠公共DNS echo nameserver 223.5.5.5 /etc/resol…1、先查DNS先测试公共 IP 连通性确保网络能出外网ping -c 4 223.5.5.5如果联不通则考虑重新配置DNS# 备份原有配置 cp /etc/resolv.conf /etc/resolv.conf.bak # 清空并写入可靠公共DNS echo nameserver 223.5.5.5 /etc/resolv.conf echo nameserver 8.8.8.8 /etc/resolv.conf echo nameserver 114.114.114.114 /etc/resolv.conf # 临时锁定文件防止被系统自动覆盖 chattr i /etc/resolv.conf #后续yum没问题之后可解锁/etc/resolv.conf允许系统自动修改 DNS chattr -i /etc/resolv.conf验证域名解析是否成功# 测试解析阿里云镜像域名 nslookup mirrors.aliyun.com2、配置yum镜像# 1. 进入yum仓库配置目录 cd /etc/yum.repos.d/ # 2. 备份所有原有repo文件创建backup目录移动所有.repo文件进去 mkdir -p backup mv *.repo backup/ # 3. 下载阿里云的CentOS 7镜像源wget直接下载无需依赖yum wget -O CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo # 4. 下载epel镜像源阿里云的epel源对应CentOS 7 wget -O epel.repo https://mirrors.aliyun.com/repo/epel-7.repo # 5. 清理原有yum缓存生成新的缓存此时镜像源已有效yum可正常工作 yum clean all yum makecache fast如果提示wget: command not found说明系统没有安装 wget先手动下载 wget rpm 包安装# 下载wget for CentOS 7 curl -O https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/wget-1.14-18.el7_6.1.x86_64.rpm # 本地安装wget无依赖直接rpm安装 rpm -ivh wget-1.14-18.el7_6.1.x86_64.rpm