单机安装Hadoop
- 安装Java
sudo apt-get install default-jdk
java-version
2.设置Hadoop用户和组
sudo addgroup hadoop
sudo adduser --ingroup hadoop hduser
3.安装并配置SSH
$ sudo apt-get install ssh
$ su hduser
$ ssh-keygen -t rsa -P ""
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
4.安装Hadoop
首先需要下载并解压Hadoop文件，运行命令：
$wget https://www.apache.org/dyn/closer.cgi/hadoop/common/hadoop-2.8.5/hadoop-2.8.5.tar.gz
下载完毕后,就是解压缩:
$ tar xvzf hadoop-2.6.0.tar.gz
然后将Hadoop文件夹搬到新文件夹，并且给hduser这个用户权限：
$ sudo mv hadoop-2.6.0 /usr/local/hadoop
$ cd /usr/local
$ sudo chown -R hduser:hadoop hadoop
sudo apt install postgresql postgresql-contrib
sudo apt-get install scala
