yum安装后出现
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
Setting up Install Process
No package gcc available.
Error: Nothing to do
如果网路良好先检查
1. cd /etc/yum.repos.d

2. wget http://mirrors.163.com/.help/CentOS7-Base-163.repo

3. mv CentOS7-Base-163.repo CentOS7-Base.repo

4.yum clean all

CentOS安装yum_yum安装

此处配置的163源。也可以配置阿里云

最后在使用yum 就可以了。

如果执行
yum -y install htop
还是出现
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
Setting up Install Process
No package gcc available.
Error: Nothing to do

那就需要安装执行这个命令
yum install epel-release -y

CentOS安装yum_其他_02

/etc/yum.repos.d  这个路径下面出现如下
[root@master yum.repos.d]# ll
CentOS安装yum_其他_03
yum就完全可以使用了