centos7虚拟机配置

安装虚拟机过程

此处略过主要讲一下配置联网

配置联网

编辑虚拟机网络

网络适配器 – NAT模式

输出命令查看配置文件名

ls  /etc/sysconfig/network-scripts 

我的是ens33

 vi  /etc/sysconfig/network-scripts/ifcfg-ens33 对我们的配置文件进行编辑

只用把ONBOOT=no改为yes即可  然后点击esc，键入:wq保存并退出

最后一步输入reboot直接重启虚拟机，可以联网 

使用时候还有可能遇到DNS解析失败，我们需要继续配置

切换阿里云源

先备份当前源

sudo cp /etc/yum.repos.d/pgdg-redhat-all.repo /etc/yum.repos.d/pgdg-redhat-all.repo.backup

切换阿里云源

sudo curl -o /etc/yum.repos.d/pgdg-redhat-all.repo https://mirrors.aliyun.com/postgresql/repos/yum/12/redhat/rhel-7-x86_64/pgdg-redhat-all.repo

检查网络链接

ping -c 4 google.com

检查和配置 DNS

sudo vi /etc/resolv.conf

进入后按O编辑

nameserver 8.8.8.8

nameserver 8.8.4.4

按ESC 输出:wq保存退出 

q!是不保存退出

如果还是不行 vi /etc/yum.repos.d/CentOS-Base.repo编辑

# 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-$releasever – Base – mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/         http://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/         http://mirrors.cloud.aliyuncs.com/centos/$releasever/os/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7   #released updates  [updates] name=CentOS-$releasever – Updates – mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/         http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/         http://mirrors.cloud.aliyuncs.com/centos/$releasever/updates/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7   #additional packages that may be useful [extras] name=CentOS-$releasever – Extras – mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/         http://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/         http://mirrors.cloud.aliyuncs.com/centos/$releasever/extras/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7   #additional packages that extend functionality of existing packages [centosplus] name=CentOS-$releasever – Plus – mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/         http://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/         http://mirrors.cloud.aliyuncs.com/centos/$releasever/centosplus/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7   #contrib – packages by Centos Users [contrib] name=CentOS-$releasever – Contrib – mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/         http://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/         http://mirrors.cloud.aliyuncs.com/centos/$releasever/contrib/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7  

注意版本。我是在24-8-9使用

重新输入 ping -c 4 google.com 验证联网

可以安装些常用软件

sudo rpm -ivh http://mirror.centos.org/centos/7/updates/x86_64/Packages/yum-3.4.3-167.el7.centos.noarch.rpm 验证安装结果

rpm -q yum

sudo yum install vim

安装软件时，可能会出现一些问题

可以手动添加/etc/yum.repos.d/文件中的repo的内容，来添加你需要的地址

可以使用yum info app名称来查看用的地址

有时候需要删除无用的repo相关文件

同步时间工具

sudo yum install chrony

启动或者关闭

sudo systemctl start chronyd

sudo systemctl enable chronyd

同步时间

sudo chronyc -a makestep