[系统运维]Redhat7配置Centos7的yum源

Redhat7配置yum源

参考地址: https://blog.csdn.net/techgroup/article/details/100549877

系统版本:Redhat7.9

安装选bios,不要选UEFI

关闭防火墙和SELinux

先停止防火墙和关闭SELinux

查看防火墙状态

firewall-cmd --state
#或 
systemctl status firewalld.service

停止firewall

systemctl stop firewalld.service

禁止firewall开机启动

systemctl disable firewalld.service

永久关闭selinux(非必须执行)

查看SELinux状态

sestatus

修改SELinux的配置为disabled

vi /etc/selinux/config

将SELINUX=enforcing改为SELINUX=disabled

关闭selinux服务

setenforce 0

新建调试版yum源

# 备份rhel.repo
mv /etc/yum.repos.d/rhel.repo /etc/yum.repos.d/rhel.repo.bak
# 新建yum调试源
touch /etc/yum.repos.d/rhel-debuginfo.repo

将以下内容粘贴到rhel-debuginfo.repo

[base]
name=CentOS-$7 - Base - 163.com

baseurl=http://mirrors.163.com/centos/7/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

[updates]
name=CentOS-$7 - Updates - 163.com

baseurl=http://mirrors.163.com/centos/7/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

[extras]
name=CentOS-$7 - Extras - 163.com

baseurl=http://mirrors.163.com/centos/7/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

[centosplus]
name=CentOS-$7 - Plus - 163.com
baseurl=http://mirrors.163.com/centos/7/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

刷新源

#刷新新yum缓存
yum makecache

重新安装yum包

#查看自带版的yum版本
yum --version
#重新安装yum包
yum reinstall yum-* -y
#重新yum安装依赖包
yum reinstall yum yum-metadata-parser yum-plugin-fastestmirror yum-updateonboot yum-utils -y
#查看新版的yum版本
yum --version

测试安装软件包

#安装软件包
yum install wget vim netstat open-vm-tools -y

删除RHN注册和订阅提示

#删除RHN注册和订阅提示
#查找subscription-manager和rhn相关组件:
rpm -qa|grep -E 'subscription-manager|rhn'
#删除subscription-manager和rhn相关组件：
sudo yum remove subscription-manager rhn-check -y

安装epel补充源

#补充epel源
#下载epel.repo阿里加速源
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
# 刷新缓存
yum makecache fast

更新系统

# 更新软件包,自动解决依赖关系
yum upgrade --obsoletes -y

服务器网络优化

echo "vm.max_map_count=262144" >> /etc/sysctl.conf
echo "net.ipv4.ip_local_port_range=\"15000 61000\"" >> /etc/sysctl.conf
echo "net.ipv4.tcp_fin_timeout=30" >> /etc/sysctl.conf
echo "net.core.somaxconn=1024" >> /etc/sysctl.conf
echo "net.core.netdev_max_backlog=2000" >> /etc/sysctl.conf
echo "net.ipv4.tcp_max_syn_backlog=2048" >> /etc/sysctl.conf
echo "vm.overcommit_memory=1" >> /etc/sysctl.conf
echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
#使网络配置生效
sysctl -p

关闭ipv6(建议执行)

通过编辑/etc/sysctl.conf文件，追加下面的配置：

echo "net.ipv6.conf.all.disable_ipv6 = 1" >> /etc/sysctl.conf
echo "net.ipv6.conf.default.disable_ipv6 = 1" >> /etc/sysctl.conf
echo "net.ipv6.conf.lo.disable_ipv6 = 1" >> /etc/sysctl.conf
#使网络配置生效
sudo sysctl -p

安装常用软件

安装常用工具

#安装常用网络工具
yum install -y net-tools telnet htop open-vm-tools wget vim

基本性能优化

# 安装tuned调优工具
yum install tuned
# 使用系统推荐的优化方案
tuned-adm recommend