CentOS-7基础配置
关闭不需使用的模块
echo "blacklist i2c_piix4" >> /etc/modprobe.d/blacklist.conf
echo "blacklist pcspkr" >> /etc/modprobe.d/blacklist.conf
sed -i '/SELINUX=enforcing/s/^/#/' /etc/selinux/config
sed -i '/#SELINUX=enforcing/a SELinux=disabled' /etc/selinux/config
SSH配置
编辑：/etc/ssh/sshd_config
UseDNS no
PubkeyAuthentication yes
移除不需要的服务
systemctl stop postfix
systemctl disable postfix
yum -y remove postfix
yum list installed | grep mariadb
yum -y remove mariadb-libs.x86_64
配置防火墙
firewall-cmd --zone=public --add-port=5432/tcp --permanent
firewall-cmd --reload
# systemctl stop firewalld
# systemctl disable firewalld
配置镜像更新源
编辑：/etc/yum.repos.d/CentOS-Base.repo
[base]
name=CentOS-$releasever - Base
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
更新系统，安装常用软件包
yum makecache
yum update
# yum -y install java-1.8.0-openjdk
# yum -y groupinstall "Development Tools"
yum clean all
