Docker Image
Ubuntu
系统版本是 20.04
apt update
apt install nano sudo openssh-server
换阿里源
nano /etc/apt/sources.list
将下面内容写入
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
apt clean
apt update
添加 hadoop 用户（略过）
之后会有一些个人信息提醒
adduser hadoop
进入 /etc/sudoers，在 root 的下方添加一行，这样 hadoop 用户就可以用 sudo 了。
nano /etc/sudoers
root ALL=(ALL:ALL) ALL
hadoop ALL=(ALL:ALL) ALL
开启 ssh
apt install openssh-server
/etc/init.d/ssh restart
修改配置文件，使 root 也能登陆
nano /etc/ssh/sshd_config
注释这一行 PermitRootLogin prohibit-password
添加一行 PermitRootLogin yes
# PermitRootLogin prohibit-password
PermitRootLogin yes
配置免密登陆
# 若没有该目录，请先执行一次ssh localhost
cd ~/.ssh/
# 会有提示，都按回车就可以
ssh-keygen -t rsa
# 加入授权
cat ./id_rsa.pub >> ./authorized_keys
安装 Java 环境 和 Hadoop 3.1.3
其中的一些意外
Hadoop分布式启动报错ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation.