分类 操作系统 下的文章

1、安装chrony

sudo yum install -y chrony

2、编辑配置文件

vi  /etc/chrony.conf
注释掉 pool 2.centos.pool.ntp.org.iburst
然后增加如下两行
server ntp.aliyun.com iburst
server cn.ntp.org.cn iburst

3、启动和设置配置文件

sudo  systemctl start chronyd
sudo systemctl enable chronyd

4、时间与时区查看

timedatectl

1、安装docker

sudo apt-get update && sudo apt-get upgrade
sudo curl -fsSL get.docker.com -o get-docker.sh && sh get-docker.sh

2、安装Docker-compose

sudo apt-get install docker-compose

3、非root用户执行docker 无需加sudo

sudo usermod -aG docker [user_name]
sudo reboot

4、参考地址

https://lingshunlab.com/book/raspberry-pi/raspberry-pi-install-docker-and-install-docker-compose
https://raspberrypi.club/61.html

1、java 53-jdk11

vi install_java.sh
#!/bin/bash
# 一键安装java-11-openjdk

cd ~
echo "选择安装版本："；
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>";
echo ">>>1. 部分安装功能不缺（一百兆左右）>>>";
echo ">>>2. 全部安装 （1G左右）>>>>>>>>>>>>>>";
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>";
read CHIOCE;
if [ $# == 0 ]; then 
    echo "==> 默认选择 ==> “1”"；
    yum install java-11-openjdk java-11-openjdk-devel -y
else
    if [[ $CHIOCE == '1' ]]; then
        echo "==> 将开始下载部分版本";
        yum install java-11-openjdk java-11-openjdk-devel -y
    elif [[ $CHINCE == '2' ]]; then
        echo "==> 将开始下载完整版本";
        yum install java-11-openjdk* -y
    else
        echo "==> 默认选择 ==> “1”"；
    yum install java-11-openjdk java-11-openjdk-devel -y
        #statements
    fi
fi

if [ $? == 0 ]; then
    echo "==> 设置环境变量！";
    echo "JAVA_HOME=/usr/lib/jvm/java" >> /etc/profile
    echo "PATH=$PATH:$JAVA_HOME/bin" >> /etc/profile
    echo "CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar" >> /etc/profile
    echo "export JAVA_HOME CLASSPATH PATH" >> /etc/profile
else
    echo "==> 执行失败！";
    eixt;
fi

echo "==> 验证："
java -version
javac -version
if [ $? -eq 0 ]; then
    echo "==> 安装成功！";
else
    echo "==> 安装失败！";
fi

2、java jdk1.8

vi install_java.sh
#!/bin/bash
# 一键安装jdk1.8

cd ~
echo "选择安装版本："；
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>";
echo ">>>1. 部分安装功能不缺（一百兆左右）>>>";
echo ">>>2. 全部安装 （1G左右）>>>>>>>>>>>>>>";
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>";
read CHIOCE;
if [ $# == 0 ]; then 
    echo "==> 默认选择 ==> “1”"；
    yum install java-1.8.0-openjdk java-1.8.0-openjdk-devel -y
else
    if [[ $CHIOCE == '1' ]]; then
        echo "==> 将开始下载部分版本";
        yum install java-1.8.0-openjdk java-1.8.0-openjdk-devel -y
    elif [[ $CHINCE == '2' ]]; then
        echo "==> 将开始下载完整版本";
        yum install java-1.8.0-openjdk* -y
    else
        echo "==> 默认选择 ==> “1”"；
    yum install java-1.8.0-openjdk java-1.8.0-openjdk-devel -y
        #statements
    fi
fi

if [ $? == 0 ]; then
    echo "==> 设置环境变量！";
    echo "JAVA_HOME=/usr/lib/jvm/java" >> /etc/profile
    echo "PATH=$PATH:$JAVA_HOME/bin" >> /etc/profile
    echo "CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar" >> /etc/profile
    echo "export JAVA_HOME CLASSPATH PATH" >> /etc/profile
else
    echo "==> 执行失败！";
    eixt;
fi

echo "==> 验证："
java -version
javac -version
if [ $? -eq 0 ]; then
    echo "==> 安装成功！";
else
    echo "==> 安装失败！";
fi

1、CentOS 8 防火墙,如果不存在，就先安装

yum install firewalld -y
systemctl enable firewalld  && systemctl start firewalld.service && firewall-cmd --zone=public --add-port=22/tcp --permanent

2、增加常用端口

firewall-cmd --zone=public --add-port=443/tcp --permanent
firewall-cmd --zone=public --add-port=22/tcp --permanent
firewall-cmd --zone=public --add-port=53/udp --permanent
firewall-cmd --zone=public --add-port=53/tcp--permanent
firewall-cmd --zone=public --add-port=80/tcp --permanent
firewall-cmd --zone=public --add-port=80-90/tcp --permanent

3、删除

firewall-cmd --zone=public --remove-port=80/tcp --permanent

4、重启防火墙命令

firewall-cmd --reload 或者 service firewalld restart

5、查看开放的端口：

firewall-cmd --permanent --list-port

启动： systemctl start firewalld

关闭： systemctl stop firewalld

查看状态： systemctl status firewalld

开机禁用 ： systemctl disable firewalld

开机启用 ： systemctl enable firewalld

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