CentOS 7更换阿里云的源操作步骤：
root@hadoop001 \~\]# cd /etc/yum.repos.d/ \[root@hadoop001 yum.repos.d\]# mv CentOS-Base.repo CentOS-Base.repo.bak \[root@hadoop001 yum.repos.d\]# wget -O /etc/yum.repos.d/CentOS-Base.repo \[root@hadoop001 yum.repos.d\]# sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo \[root@hadoop001 yum.repos.d\]# vim CentOS-Base.repo \[root@hadoop001 yum.repos.d\]# yum makecache --------------------- CentOS-Base.repo配置如下: \[base
name=CentOS-$releasever - Base - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
继续操作
root@hadoop154 \~\]# yum install -y epel-release 完毕！ ---------------------------------------------------------------------------- 出现以下情况，kill -9 2914进程 \[root@hadoop001 \~\]# yum install -y epel-release 已加载插件：fastestmirror, langpacks /var/run/yum.pid 已被锁定，PID 为 2914 的另一个程序正在运行。 Another app is currently holding the yum lock; waiting for it to exit... 另一个应用程序是：PackageKit 内存：295 M RSS （1.2 GB VSZ） 已启动： Tue Jan 7 19:32:35 2025 - 02:49之前 状态 ：睡眠中，进程ID：2914 \^C Exiting on user cancel. \[root@hadoop001 \~\]# kill -9 2914 ----------------------------------------------------------------------------