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Linux系统配置yum源和ntpd服务

一.配置yum源：

1.Centos7系统：

执行vi /etc/yum.repos.d/CentOS-Base.repo ，将原有内容替换为如下内容：

[base]
name=CentOS-$releasever - Base - mirrors.jdcloudcs.com
baseurl=http://mirrors.jdcloudcs.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.jdcloudcs.com/centos/RPM-GPG-KEY-CentOS-7

[updates]
name=CentOS-$releasever - Updates - mirrors.jdcloudcs.com
baseurl=http://mirrors.jdcloudcs.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.jdcloudcs.com/centos/RPM-GPG-KEY-CentOS-7

[extras]
name=CentOS-$releasever - Extras - mirrors.jdcloudcs.com
baseurl=http://mirrors.jdcloudcs.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.jdcloudcs.com/centos/RPM-GPG-KEY-CentOS-7

[centosplus]
name=CentOS-$releasever - Plus - mirrors.jdcloudcs.com
baseurl=http://mirrors.jdcloudcs.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.jdcloudcs.com/centos/RPM-GPG-KEY-CentOS-7

[contrib]
name=CentOS-$releasever - Contrib - mirrors.jdcloudcs.com
baseurl=http://mirrors.jdcloudcs.com/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.jdcloudcs.com/centos/RPM-GPG-KEY-CentOS-7
wq保存文件退出。

2.Centos6系统：

执行vi /etc/yum.repos.d/CentOS-6.repo ，将原有内容替换为如下内容：

[base]
name=CentOS-$releasever - Base - mirrors.jdcloudcs.com
baseurl=http://mirrors.jdcloudcs.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.jdcloudcs.com/centos/RPM-GPG-KEY-CentOS-6

[updates]
name=CentOS-$releasever - Updates - mirrors.jdcloudcs.com
baseurl=http://mirrors.jdcloudcs.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.jdcloudcs.com/centos/RPM-GPG-KEY-CentOS-6

[extras]
name=CentOS-$releasever - Extras - mirrors.jdcloudcs.com
baseurl=http://mirrors.jdcloudcs.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.jdcloudcs.com/centos/RPM-GPG-KEY-CentOS-6

[centosplus]
name=CentOS-$releasever - Plus - mirrors.jdcloudcs.com
baseurl=http://mirrors.jdcloudcs.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.jdcloudcs.com/centos/RPM-GPG-KEY-CentOS-6

[contrib]
name=CentOS-$releasever - Contrib - mirrors.jdcloudcs.com
baseurl=http://mirrors.jdcloudcs.com/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.jdcloudcs.com/centos/RPM-GPG-KEY-CentOS-6
wq保存文件退出。

3.Centos8系统：

鉴于CentOS 8操作系统版本已结束生命周期（EOL），且CentOS社区已于2021年12月31日起停止CentOS 8版本维护，京东云将不再对CentOS 8镜像进行维护和更新。

停止维护影响说明：

①您使用CentOS 8镜像创建的云主机和基于该镜像所创建的私有镜像，后续仍可正常使用，但无法获得包括问题修复和功能更新在内的任何软件维护和支持。

②原有CentOS 8 yum源将不能访问，为保证您存量云主机的使用，建议使用centos-vault作为停止支持的CentOS的yum源。切换方法如下：

在虚机中下载 http://mirrors.jdcloudcs.com/repo/CentOS-8-vault.repo 文件，替换原CentOS-8.repo文件，具体操作命令如下：


cd /etc/yum.repos.d
wget http://mirrors.jdcloudcs.com/repo/CentOS-8-vault.repo
mv CentOS-8.repo /root
yum clean all

以上操作成功后即可继续使用yum安装软件。

4.Ubantu系统：

执行vi /etc/apt/sources.list ，将原有内容替换为如下内容：

deb http://mirrors.jdcloudcs.com/ubuntu/ xenial main restricted

deb http://mirrors.jdcloudcs.com/ubuntu/ xenial-updates main restricted

deb http://mirrors.jdcloudcs.com/ubuntu/ xenial universe

deb http://mirrors.jdcloudcs.com/ubuntu/ xenial-updates universe

deb http://mirrors.jdcloudcs.com/ubuntu/ xenial multiverse

deb http://mirrors.jdcloudcs.com/ubuntu/ xenial-updates multiverse

deb http://mirrors.jdcloudcs.com/ubuntu/ xenial-backports main restricted universe multiverse

deb http://mirrors.jdcloudcs.com/ubuntu/ xenial-security main restricted

deb http://mirrors.jdcloudcs.com/ubuntu/ xenial-security universe

deb http://mirrors.jdcloudcs.com/ubuntu/ xenial-security multiverse
wq保存文件退出。

二.配置ntpd服务：

1.调整ntpd配置文件：

执行vi /etc/ntp.conf，将原有内容替换为如下内容：

driftfile /var/lib/ntp/drift

pidfile /var/run/ntpd.pid

logfile /var/log/ntp.log

#Access Control Support

restrict default kod nomodify notrap nopeer noquery

restrict -6 default kod nomodify notrap nopeer noquery

restrict 127.0.0.1

#local clock

server 127.127.1.0

fudge 127.127.1.0 stratum 10

#jdcloud ntp server

server ntp.jdcloudcs.com iburst minpoll 4 maxpoll 10

fudge ntp.jdcloudcs.com stratum 2

wq保存文件退出。

2.启动ntpd服务：

执行services ntpd start（Centos6系统）

执行systemctl start ntpd（Centos7系统）

执行services ntpd start（Ubantu系统）

3.设置开机自启动服务：

执行chkconfig ntpd on（Centos6系统）

执行systemctl enable ntpd（Centos7系统）

执行chkconfig ntpd on（Ubantu系统，需要先apt-get install chkconfig进行安装）

更新时间：2022-08-12 14:24:42
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