2013-01-30

從 PDF 抽出圖檔

• [參考] ​How to Extract Images from PDF Documents in Ubuntu/Linux

  ~$ sudo apt-get install poppler-utils
  ## pdfimages -j '來源.pdf' 圖檔命名-prefix
  ~$ pdfimages -j 'Cool Pix of 2011.pdf' cool2011
  

Apache BigTop

• [參考] ​How to install Hadoop distribution from Bigtop 0.5.0
• [測試環境] ​http://easycloud.nchc.org.tw

  root@vm36:~# lsb_release -a
  No LSB modules are available.
  Distributor ID:	Ubuntu
  Description:	Ubuntu 12.04.1 LTS
  Release:	12.04
  Codename:	precise
  root@vm36:~# uname -a
  Linux vm36 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
  

• [注意] 官方說只有支援 64 位元版本
• [步驟]

  ### 首先，在 EasyCloud 的 VM 切換成 root 會比較方便。
  jazzwang.tw@vm36:~$ su -
  ### 其次，加入 BigTop 的套件金鑰，跟套件庫來源
  root@vm36:~# wget -O- http://archive.apache.org/dist/bigtop/bigtop-0.5.0/repos/GPG-KEY-bigtop | apt-key add -
  root@vm36:~# wget -O /etc/apt/sources.list.d/bigtop-0.5.0.list http://archive.apache.org/dist/bigtop/bigtop-0.5.0/repos/`lsb_release --codename --short`/bigtop.list
  ### 更新套件庫
  root@vm36:~# apt-get update
  ### 安裝 BigTop Utility
  root@vm36:~# apt-get install bigtop-utils
  ### 安裝 Oracle Java Runtime and JDK
  root@vm36:~# if [ ! -x /usr/bin/add-apt-repository ]; then
     sudo apt-get -f -y install python-software-properties
  fi
  root@vm36:~# if [ ! -x /usr/bin/java ]; then
     echo "---- [1] Installing Sun Java JDK 6 ........ ----"
     sudo add-apt-repository -y 'deb http://free.nchc.org.tw/debian stable non-free'
     sudo apt-get update
     cat << EOF | sudo /usr/bin/debconf-set-selections
   sun-java6-bin   shared/accepted-sun-dlj-v1-1    select true
   sun-java6-jdk   shared/accepted-sun-dlj-v1-1    select true
   sun-java6-jre   shared/accepted-sun-dlj-v1-1    select true
  EOF
     sudo apt-get -y --force-yes install sun-java6-jdk sun-java6-plugin
     sudo add-apt-repository -r 'deb http://free.nchc.org.tw/debian stable non-free'
  fi
  ### 設定 JAVA_HOME 到 BigTop Utility 預設值
  root@vm36:~# echo "export JAVA_HOME=/usr/lib/jvm/java-6-sun" >> /etc/default/bigtop-utils 
  ### 安裝 Hadoop 相關套件
  root@vm36:~# apt-get -y install hadoop-hdfs\* hadoop-mapreduce\*
  

• Apache BigTop 專案主要是針對最新版本的 Apache Hadoop Ecosystem 進行整體的測試，所以版本都會是比較新的。底下是 BigTop 0.5.0 正式釋出所產生的套件庫版本​(來源)：

      Apache Hadoop 2.0.2-alpha
      Apache Zookeeper 3.4.5
      Apache Flume 1.3.0
      Apache HBase 0.94.2
      Apache Pig 0.10.0
      Apache Hive 0.9.0
      Apache Sqoop 1.4.2
      Apache Oozie 3.3.0
      Apache Whirr 0.8.1
      Apache Mahout 0.7
      Apache Solr (SolrCloud) 4.0.0
      Apache Crunch (incubating) 0.4.0
      DataFu 0.0.4
      Hue 2.1.0