centos7/8系统初始化脚本(懒人福音)
bash
#! /bin/bash
VERSION_ID=$(grep -oP 'VERSION_ID="\K\d+' /etc/os-release)
DIR=/etc/yum.repos.d
file_path=/etc/chrony.conf
update_yum() {
cd $DIR && rm -rf * && yum clean all
if [ "$VERSION_ID" -eq 7 ]; then
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
else
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
fi
echo "阿里云yum源配置成功!!!" && sleep 2s
}
# 关闭防火墙和SELINUX
firewalld() {
systemctl stop firewalld && systemctl disable firewalld &> /dev/null
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
echo "SElinux已禁用,重新启动后才可生效" && sleep 2s
}
# 修改主机名称
set_ps1() {
echo "PS1='\[\e[35m\][\u@\h \W]#\[\e[m\] '" >> /root/.bashrc
echo "提示符已修改成功,请重新登录生效" && sleep 2s
}
#设置时间同步,为确保某些机器无法通过正常修改时区实现时间同步所以这里直接修改配置文件
datetime() {
if [ -e "$file_path" ]; then
echo "chrony服务已经安装,正在配置"
else
yum -y install chrony &> /dev/null
echo "chrony 已成功安装" && sleep 2s
fi
cat <<EOF > /etc/chrony.conf
# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html)
# 国家服务器
server 0.cn.pool.ntp.org
server 1.cn.pool.ntp.org
server 2.cn.pool.ntp.org
server 3.cn.pool.ntp.org
# 阿里
server ntp.aliyun.com
# 腾讯
server time1.cloud.tencent.com
server time2.cloud.tencent.com
server time3.cloud.tencent.com
server time4.cloud.tencent.com
server time5.cloud.tencent.com
# if its offset is larger than 1 second.
makestep 1.0 3
# Enable kernel synchronization of the real-time clock (RTC).
rtcsync
# Specify directory for log files.
logdir /var/log/chrony
EOF
timedatectl set-timezone Asia/Shanghai && systemctl restart chronyd
echo "时间同步已同步完成" && sleep 2s
}
# 修改epel源
update_epel() {
yum clean all &> /dev/null
if sudo yum -y install epel-release &> /dev/null ; then
sudo sed -e 's!^metalink=!#metalink=!g' \
-e 's!^#baseurl=!baseurl=!g' \
-e 's!https\?://download\.fedoraproject\.org/pub/epel!https://mirrors.tuna.tsinghua.edu.cn/epel!g' \
-e 's!https\?://download\.example/pub/epel!https://mirrors.tuna.tsinghua.edu.cn/epel!g' \
-i /etc/yum.repos.d/epel*.repo
fi
echo "epel源配置完毕" && sleep 2s
}
# 安装一些常用软件
yum_install(){
yum update &> /dev/null
echo "正在安装常用软件..."
yum -y install vim wget tree net-tools lrzsz zip lsof tcpdump &> /dev/null
echo "软件安装完成,所有配置已就绪,系统将在5秒后重启..." && sleep 5s && reboot
}
start(){
update_yum
firewalld
set_ps1
datetime
update_epel
yum_install
}
start