Hadoop：输入“start-all.sh”后需要root密码 [英] Hadoop: require root's password after enter "start-all.sh"

问题描述

我在笔记本电脑上安装了Hadoop和SSH。 ssh localhost工作正常。格式化HDFS后，我尝试启动hadoop。

  munichong @ GrindPad：〜$ sudo /usr/sbin/start-all.sh 
开始namenode，登入/var/log/hadoop/root/hadoop-root-namenode-GrindPad.out 
 root @ localhost的密码：
 root @ localhost的密码：localhost：权限被拒绝，请重试。 
 
 localhost：权限被拒绝（公钥，密码）。 
  

它需要密码。我的角色是munichong。但慕名的密码在这里不起作用。在这里，我的角色已经变成了根。我不知道我是否在这里遗漏了一些东西。

有没有人可以帮助我？

谢谢！ / b>

解决方案：

1）无需密码即可生成ssh密钥

p>

  $ ssh-keygen -t rsa -P
  

2）将id_rsa.pub复制到授权密钥

  $ cat $ HOME /.ssh/id_rsa.pub>> $ HOME / .ssh / authorized_keys 
  

3）启动ssh localhost

  $ ssh localhost 
  

<4>现在转到hadoop sbin目录并启动hadoop

  $。/ start-all.sh 
 ./start-all .sh 
此脚本已弃用。请使用start-dfs.sh和start-yarn.sh 
在[localhost]上启动namenodes 
 localhost：启动namenode，记录到/ home / amtex / Documents / installed / hadoop / logs / hadoop-amtex -namenode-amtex-desktop.out 
 localhost：启动datanode，记录到/home/amtex/Documents/installed/hadoop/logs/hadoop-amtex-datanode-amtex-desktop.out 
启动辅助名称节点[0.0.0.0] 
 0.0.0.0：启动secondarynamenode，记录到/home/amtex/Documents/installed/hadoop/logs/hadoop-amtex-secondarynamenode-amtex-desktop.out 
启动纱线守护程序
启动resourcemanager，记录到/home/amtex/Documents/installed/hadoop/logs/yarn-amtex-resourcemanager-amtex-desktop.out 
 localhost：启动nodemanager，记录到/ home / amtex / Documents /安装/ hadoop / logs / yarn-amtex-nodemanager-amtex-desktop.out 
  

5）密码不是询问

  $ jps 
 12373 Jps 
 11823 SecondaryNameNode 
 11643 DataNode 
 12278 NodeManage r 
 11974 ResourceManager 
 11499 NameNode 
  

I have installed Hadoop and SSH on my laptop. "ssh localhost" works fine. After formatting HDFS, I tried to start hadoop.

munichong@GrindPad:~$ sudo /usr/sbin/start-all.sh
starting namenode, logging to /var/log/hadoop/root/hadoop-root-namenode-GrindPad.out
root@localhost's password: 
root@localhost's password: localhost: Permission denied, please try again.

localhost: Permission denied (publickey,password).

It requires password. My role is "munichong". But munichong's password does not work here. Here, my role has changed to "root". I do not know whether I missed something here.

Is there anyone can help me?

Thanks!

解决方案

Solution:

1) Generate ssh key without password

$ ssh-keygen -t rsa -P ""

2) Copy id_rsa.pub to authorized-keys

$  cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys

3) Start ssh localhost

$ ssh localhost

4) now go to the hadoop sbin directory and start hadoop

$./start-all.sh 
./start-all.sh
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
Starting namenodes on [localhost]
localhost: starting namenode, logging to /home/amtex/Documents/installed/hadoop/logs/hadoop-amtex-namenode-amtex-desktop.out
localhost: starting datanode, logging to /home/amtex/Documents/installed/hadoop/logs/hadoop-amtex-datanode-amtex-desktop.out
Starting secondary namenodes [0.0.0.0]
0.0.0.0: starting secondarynamenode, logging to /home/amtex/Documents/installed/hadoop/logs/hadoop-amtex-secondarynamenode-amtex-desktop.out
starting yarn daemons
starting resourcemanager, logging to /home/amtex/Documents/installed/hadoop/logs/yarn-amtex-resourcemanager-amtex-desktop.out
localhost: starting nodemanager, logging to /home/amtex/Documents/installed/hadoop/logs/yarn-amtex-nodemanager-amtex-desktop.out

5)password not asking

$ jps 
12373 Jps
11823 SecondaryNameNode
11643 DataNode
12278 NodeManager
11974 ResourceManager
11499 NameNode

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