ATMathew's questions

我在 Ubuntu 10.10 中工作，并试图在 Hadoop 中启动一个单节点集群。

hadoop@abraham-Dimension-3000:/usr/local/hadoop$ bin/start-all.sh
mkdir: cannot create directory `/usr/local/hadoop/bin/../logs': Permission denied
starting namenode, logging to /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-abraham-Dimension-3000.out
/usr/local/hadoop/bin/hadoop-daemon.sh: line 117: /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-abraham-Dimension-3000.out: No such file or directory
head: cannot open `/usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-abraham-Dimension-3000.out' for reading: No such file or directory
localhost: mkdir: cannot create directory `/usr/local/hadoop/bin/../logs': Permission denied
localhost: starting datanode, logging to /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-abraham-Dimension-3000.out
localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117: /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-abraham-Dimension-3000.out: No such file or directory
localhost: head: cannot open `/usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-abraham-Dimension-3000.out' for reading: No such file or directory
localhost: mkdir: cannot create directory `/usr/local/hadoop/bin/../logs': Permission denied
localhost: starting secondarynamenode, logging to /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-abraham-Dimension-3000.out
localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117: /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-abraham-Dimension-3000.out: No such file or directory
localhost: head: cannot open `/usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-abraham-Dimension-3000.out' for reading: No such file or directory
mkdir: cannot create directory `/usr/local/hadoop/bin/../logs': Permission denied
starting jobtracker, logging to /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-abraham-Dimension-3000.out
/usr/local/hadoop/bin/hadoop-daemon.sh: line 117: /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-abraham-Dimension-3000.out: No such file or directory
head: cannot open `/usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-abraham-Dimension-3000.out' for reading: No such file or directory
localhost: mkdir: cannot create directory `/usr/local/hadoop/bin/../logs': Permission denied
localhost: starting tasktracker, logging to /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-abraham-Dimension-3000.out
localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117: /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-abraham-Dimension-3000.out: No such file or directory
localhost: head: cannot open `/usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-abraham-Dimension-3000.out' for reading: No such file or directory
hadoop@abraham-Dimension-3000:/usr/local/hadoop$ 

我不知道我做错了什么或其中一些错误暗示了什么。

hadoop@abraham-Dimension-3000:/usr/local/hadoop$ jps
5099 Jps

任何人都可以诊断问题。

当我运行更新时，我收到以下错误。

GPG error: http://cran.wustl.edu maverick/ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 51716619E084DAB9

因此，我运行以下代码并收到以下错误消息：

$ gpg --keyserver subkeys.pgp.net --recv 51716619E084DAB9
gpg: requesting key E084DAB9 from hkp server subkeys.pgp.net
gpg: key E084DAB9: "Michael Rutter <[email protected]>" not changed
gpg: Total number processed: 1
gpg:              unchanged: 1

如何设置有效的公钥或者我可以做些什么来解决这个问题？

我最近删除了我的 Windows 分区，现在只运行 Ubuntu 10.10

我想重新安装最新版本的 R，但出现了一些奇怪的错误消息。

我正在使用他们网站上的说明进行安装：

http://cran.r-project.org/bin/linux/ubuntu/

~$ deb http://cran.wustl.edu/bin/linux/ubuntu maverick/
No command 'deb' found, did you mean:
 Command 'debc' from package 'devscripts' (main)
 Command 'derb' from package 'libicu-dev' (main)
 Command 'dab' from package 'bsdgames' (universe)
 Command 'debi' from package 'devscripts' (main)
 Command 'xdeb' from package 'xdeb' (universe)
deb: command not found

这是怎么回事？帮助？！

当我重新安装 Ubuntu 并删除 Windows 分区时，ubuntu 终端在终端启动时有一条消息。当我双启动时，这并没有发生。

To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

我目前正在双引导到 Ubuntu 10.10 或 Windows XP。但是，我很少使用 windows 并想将其删除。

我使用 Ubuntu live CD 访问 GParted。我还删除了标记为 ntfs 和 fat32 的 windows 分区（我认为）。

我只是不确定如何扩展 Ubuntu 分区以覆盖未分配的空间。此外，我如何处理表示分区忙的“键”指定。

帮助！

我正在使用以下站点在 Ubuntu 10.10 http://arifn.web.id/blog/2010/07/29/running-hadoop-single-cluster.html中安装和配置 Hadoop

但是，当我尝试格式化 Hadoop 文件系统时，出现以下错误。

amathew@amathew-Dimension-3000:~$ cd /usr/local/hadoop
amathew@amathew-Dimension-3000:/usr/local/hadoop$ bin/hadoop namenode -format
11/04/16 21:23:07 INFO namenode.NameNode: STARTUP_MSG: 
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = amathew-Dimension-3000/192.168.1.66
STARTUP_MSG:   args = [-format]
STARTUP_MSG:   version = 0.20.2
STARTUP_MSG:   build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r 911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010
************************************************************/
11/04/16 21:23:08 INFO namenode.FSNamesystem: fsOwner=amathew,amathew,adm,dialout,cdrom,plugdev,lpadmin,admin,sambashare
11/04/16 21:23:08 INFO namenode.FSNamesystem: supergroup=supergroup
11/04/16 21:23:08 INFO namenode.FSNamesystem: isPermissionEnabled=true
11/04/16 21:23:08 ERROR namenode.NameNode: java.io.IOException: Cannot create directory /usr/local/hadoop-datastore/hadoop/dfs/name/current
    at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.clearDirectory(Storage.java:295)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1086)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1110)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:856)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:948)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965)

11/04/16 21:23:08 INFO namenode.NameNode: SHUTDOWN_MSG: 
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at amathew-Dimension-3000/192.168.1.66
************************************************************/

任何人都可以帮助解决这些错误消息，即ERROR namenode.NameNode: java.io.IOException: Cannot create directory /usr/local/hadoop-datastore/hadoop/dfs/name/current.

$ sudo mkdir /usr/local/hadoop/datastore
$ sudo chown  hadoop:hadoop /usr/local/hadoop/datastore
$ sudo chmod 750 /usr/local/hadoop/datastore

我正在使用以下说明在 Ubuntu 10.10 上安装和配置 Hadoop。

http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/#installation

我试图将压缩的 tar.gz 文件保存到，/usr/local/但它就是无法保存。

我尝试将 tar.gz 保存在我的主文件夹和桌面并将文件复制到所需的文件夹，但我收到一个错误，告诉我我没有权限。

如何将 tar.gz 文件夹保存并提取到/usr/local/hadoop?

考虑这个例子。我从 Internet 下载了一个 tar.gz 文件并将该文件的内容打开到一个目录中。假设我选择删除目录。不幸的是，我没有删除目录的权限。我该怎么办？我收到一条错误消息，提示我无权删除此目录。

~$ cd /home/amathew
~$ sudo tar xzf hadoop-0.20.2.tar.gz
~$ sudo mv hadoop-0.20.2 hadoop
~$ sudo chown -R hadoop:hadoop hadoop

提前致谢。

编辑：

~$ lsattr -RVadlv hadoop
lsattr 1.41.12 (17-May-2010)
2903294105 hadoop                       Extents

我在 Ubuntu 中遇到了大量文件权限问题，从无权删除文件、更改一段时间的内容等等。我想知道你们中的一些 Ubuntu 专家是否可以分享你们通常如何处理文件权限问题？要记住哪些一般准则和终端命令？

提前致谢。

好的，伙计们，我还有一个非常基本的问题。请多多包涵。

我正在按照以下网站上的说明在我的计算机上下载和配置 Hadoop。

http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/

当我使用 localhost 命令时，我在最后的 SSH 部分。当我运行以下代码时，我收到一条错误消息。

hadoop@amathew-Dimension-3000:~$ cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys
hadoop@amathew-Dimension-3000:~$ ssh localhost
ssh: connect to host localhost port 22: Connection refused

这里有一些其他可能相关的信息。

hadoop@amathew-Dimension-3000:~$ ssh -vvv localhost
OpenSSH_5.5p1 Debian-4ubuntu5, OpenSSL 0.9.8o 01 Jun 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to localhost [::1] port 22.
debug1: connect to address ::1 port 22: Connection refused
debug1: Connecting to localhost [127.0.0.1] port 22.
debug1: connect to address 127.0.0.1 port 22: Connection refused
ssh: connect to host localhost port 22: Connection refused

任何人都可以帮忙吗？

再次感谢您帮助尚未弄清楚事情的新手。

Ubuntu 和 Latex 新手在这里。我有一个非常基本的问题。

我最近使用以下代码安装了 Latex：

sudo apt-get install texlive

但是，我想卸载它并暂时获取乳胶基础。

我尝试了以下方法，但它不起作用：

sudo apt-get remove texlive

dpkg --get-selections | grep tex显示安装了许多与 Latex 相关的文件。

如何删除 texlive？

我是一个 Ubuntu 新手，一直在尝试安装 python 的 easy_install，这样我在安装 Python 库时就不必处理源文件。

我已经运行了以下命令，它似乎安装了正确的应用程序：

sudo apt-get install python-setuptools

但是，当我运行easy_install sqlalchemyor时easy_install pysqlite3，它不起作用。

我收到以下错误消息：

install_dir /usr/local/lib/python2.6/dist-packages/
error: can't create or remove files in install directory

The following error occurred while trying to add or remove files in the
installation directory:

    [Errno 13] Permission denied: '/usr/local/lib/python2.6/dist-packages/test-easy-install-1674.pth'

The installation directory you specified (via --install-dir, --prefix, or
the distutils default setting) was:

    /usr/local/lib/python2.6/dist-packages/

Perhaps your account does not have write access to this directory?  If the
installation directory is a system-owned directory, you may need to sign in
as the administrator or "root" account.  If you do not have administrative
access to this machine, you may wish to choose a different installation
directory, preferably one that is listed in your PYTHONPATH environment
variable.

For information on other options, you may wish to consult the
documentation at:

  http://packages.python.org/distribute/easy_install.html

Please make the appropriate changes for your system and try again.

帮助！

亚伯拉罕