Hadoop:start-dfs.sh 权限被拒绝 [英] Hadoop: start-dfs.sh permission denied

问题描述

我正在笔记本电脑上安装 Hadoop.SSH 工作正常，但我无法启动 hadoop.

I am installing Hadoop on my laptop. SSH works fine, but I cannot start hadoop.

munichong@GrindPad:~$ ssh localhost
Welcome to Ubuntu 12.10 (GNU/Linux 3.5.0-25-generic x86_64)

 * Documentation:  https://help.ubuntu.com/

0 packages can be updated.
0 updates are security updates.

Last login: Mon Mar  4 00:01:36 2013 from localhost

munichong@GrindPad:~$ /usr/sbin/start-dfs.sh
chown: changing ownership of `/var/log/hadoop/root': Operation not permitted
starting namenode, logging to /var/log/hadoop/root/hadoop-munichong-namenode-GrindPad.out
/usr/sbin/hadoop-daemon.sh: line 136: /var/run/hadoop/hadoop-munichong-namenode.pid: Permission denied
usr/sbin/hadoop-daemon.sh: line 135: /var/log/hadoop/root/hadoop-munichong-namenode-GrindPad.out: Permission denied
head: cannot open `/var/log/hadoop/root/hadoop-munichong-namenode-GrindPad.out' for reading: No such file or directory
localhost: chown: changing ownership of `/var/log/hadoop/root': Operation not permitted
localhost: starting datanode, logging to /var/log/hadoop/root/hadoop-munichong-datanode-GrindPad.out
localhost: /usr/sbin/hadoop-daemon.sh: line 135: /var/log/hadoop/root/hadoop-munichong-datanode-GrindPad.out: Permission denied
localhost: /usr/sbin/hadoop-daemon.sh: line 136: /var/run/hadoop/hadoop-munichong-datanode.pid: Permission denied
localhost: head: cannot open `/var/log/hadoop/root/hadoop-munichong-datanode-GrindPad.out' for reading: No such file or directory
localhost: chown: changing ownership of `/var/log/hadoop/root': Operation not permitted
localhost: starting secondarynamenode, logging to /var/log/hadoop/root/hadoop-munichong-secondarynamenode-GrindPad.out
localhost: /usr/sbin/hadoop-daemon.sh: line 136: /var/run/hadoop/hadoop-munichong-secondarynamenode.pid: Permission denied
localhost: /usr/sbin/hadoop-daemon.sh: line 135: /var/log/hadoop/root/hadoop-munichong-secondarynamenode-GrindPad.out: Permission denied
localhost: head: cannot open `/var/log/hadoop/root/hadoop-munichong-secondarynamenode-GrindPad.out' for reading: No such file or directory

munichong@GrindPad:~$ sudo /usr/sbin/start-dfs.sh
[sudo] password for munichong: 
starting namenode, logging to /var/log/hadoop/root/hadoop-root-namenode-GrindPad.out
localhost: Permission denied (publickey,password).
localhost: Permission denied (publickey,password).

我使用了sudo".但是权限还是被拒绝了.

I used "sudo". But the permission is still denied.

有人可以帮我吗?

提前致谢！

推荐答案

我在过去几个小时都被困在同一问题上，但最终解决了它.我的 hadoop 安装是由与我用来运行 hadoop 的用户相同的用户提取的.所以用户权限不是问题.
我的配置是这样的:Google Cloud 上的 Ubuntu linux 机器.

I was stuck at the same issue for last couple of hours but finally solved it. I had the hadoop installation extracted by same user as one I am using to run hadoop. So user privilege is not issue.
My cofiguration is like this: Ubuntu linux machine on Google Cloud.

Hadoop 安装/home/Hadoop数据目录/var/lib/hadoop并且目录访问位是 777，所以任何人都可以访问.我在远程机器上 ssh 对配置文件进行了更改并执行了 start-dfs.sh，然后它给了我权限被拒绝(公钥)"所以这里是解决方案:在同一个 ssh 终端中:

Hadoop installation /home/ Hadoop data directory /var/lib/hadoop and the directory access bits are 777 so anybody can access. I did ssh into the remote machine made changes to the config files and executed start-dfs.sh, then it gave me "Permission denied (Public key)" So here is the solution: In the same ssh terminal:

1. ssh-keygen

2.它会询问复制密钥的文件夹位置，我输入了/home/hadoop/.ssh/id_rsa

2.It will ask for folder location where it will copy the keys, I entered /home/hadoop/.ssh/id_rsa

3.它会要求输入密码，为简单起见将其留空.

3.it will ask for pass phrase, keep it empty for simplicity.

4.cat/home/hadoop/.ssh/id_rsa.pub >> .ssh/authorized_keys(将新生成的公钥复制到用户 home/.ssh 目录中的 auth 文件中)

4.cat /home/hadoop/.ssh/id_rsa.pub >> .ssh/authorized_keys (To copy the newly generated public key to auth file in your users home/.ssh directory)

1. ssh 本地主机

start-dfs.sh(现在它应该可以工作了！)

start-dfs.sh (Now it should work!)

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