１．sudo 配置问题
若开始是使用非root用户进入系统，需要先对sudo进行配置才能使用sudo
1.1 打开terminal,输入su - 进入root用户:
su -1.2 输入 vim /etc/sudoer
vim /etc/sudoers在root ALL=(ALL) ALL下一行添加：我的用户名为hsm所以添加
hsm ALL=(ALL) ALL保存
2．注册redhat
注册redhat，解决yum不能使用的问题
2.1 打开网址
https://developers.redhat.com/auth/realms/rhd/login-actions/registration?client_id=account&tab_id=gi8s4jqIdOU用教育邮箱注册帐号
然后登录
然后打开RedHat的Terminal,输入:
subscription-manager register --username=[用户名] --password=[密码] --auto-attach显示下图就所哦名安装好啦
3．yum换源
3.1 远程仓库
要是使用官方源感觉下载很慢的话，可以考虑换CentOS源
首先删除本地yum源
rpm -aq | grep yum | xargs rpm -e --nodeps
rpm -aq | grep python-iniparse | xargs rpm -e --nodeps检查是否卸载
rpm -aq | grep yum
rpm -aq | grep python下载yum安装包
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-3.4.3-163.el7.centos.noarch.rpm
wget https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm安装yum包
rpm -ivh python-iniparse-0.4-9.el7.noarch.rpm yum-metadata-parser-1.1.4-10.el7.x86_64.rpm yum-3.4.3-163.el7.centos.noarch.rpm yum-plugin-fastestmirror-1.1.31-52.el7.noarch.rpm添加源
vim /etc/yum.repos.d/CentOS-Base.repo添加
[base]
name=CentOS-$releasever - Base
baseurl=https://mirrors.aliyun.com/centos/7/os/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.aliyun.com/centos/7/updates/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7
[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.aliyun.com/centos/7/extras//$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7
[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.aliyun.com/centos/7/centosplus//$basearch/
gpgcheck=1
enabled=0清除本地缓存
yum clean all
yum makecache3.2 换本地源
配置本地源：
(1)将rehl镜像文件拷贝到系统中
(2)将镜像挂载到/mnt/yum 命令为mount 镜像.iso /mnt/yum
(3)编辑yum源配置文件
[yum]
name=yum
baseurl=file:///mnt/yum/
gpgcheck=0
enable=1(4)通过 yum repolist命令检查源是否正常
安装mysql:
再终端输入
yum update #更新资源包
yum install mysql #安装mysql
systemctl start mysqld.service #开启mysql服务
systemctl status mysqld.service #检查mysql服务状态