林子雨编著《大数据基础编程、实验和案例教程(第3版)》(教材官网)教材中的命令行和代码,在纸质教材中的印刷效果不是很好,可能会影响读者对命令行和代码的理解,为了方便读者正确理解命令行和代码或者直接拷贝命令行和代码用于上机实验,这里提供全书配套的所有命令行和代码。
查看教材所有章节的代码
第3章 Hadoop的安装和使用
教材第29页
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sudo apt-get update
sudo apt-get install openssh-server
ssh localhost
教材第30页
cd ~/.ssh/ # 若没有该目录,请先执行一次ssh localhost
ssh-keygen -t rsa # 会有提示,都按回车即可
cat ./id_rsa.pub >> ./authorized_keys # 加入授权
教材第31页
cd /usr/lib
sudo mkdir jvm #创建/usr/lib/jvm目录用来存放JDK文件
cd ~ #进入hadoop用户的主目录
cd Downloads
sudo tar -zxvf ./jdk-8u171-linux-x64.tar.gz -C /usr/lib/jvm
vim ~/.bashrc
export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_171
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
source ~/.bashrc
java -version
教材第32页
sudo tar -zxf ~/下载/hadoop-3.3.5.tar.gz -C /usr/local # 解压到/usr/local中
cd /usr/local/
sudo mv ./hadoop-3.3.5/ ./hadoop # 将文件夹名改为hadoop
sudo chown -R hadoop ./hadoop # 修改文件权限
cd /usr/local/hadoop
./bin/hadoop version
cd /usr/local/hadoop
./bin/hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce-examples-3.3.5.jar
教材第33页
cd /usr/local/hadoop
mkdir input
cp ./etc/hadoop/*.xml ./input # 将配置文件复制到input目录下
./bin/hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce-examples-*.jar grep ./input ./output 'dfs[a-z.]+'
cat ./output/* # 查看运行结果
rm -r ./output
<configuration>
<property>
<name>hadoop.tmp.dir</name>
<value>file:/usr/local/hadoop/tmp</value>
<description>Abase for other temporary directories.</description>
</property>
<property>
<name>fs.defaultFS</name>
<value>hdfs://localhost:9000</value>
</property>
</configuration>
教材第34页
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>file:/usr/local/hadoop/tmp/dfs/name</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>file:/usr/local/hadoop/tmp/dfs/data</value>
</property>
</configuration>
cd /usr/local/hadoop
./bin/hdfs namenode -format
教材第35页
cd /usr/local/hadoop
./sbin/start-dfs.sh #start-dfs.sh是个完整的可执行文件,中间没有空格
教材第36页
export HADOOP_HOME=/usr/local/hadoop
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
jps
教材第37页
./sbin/stop-dfs.sh # 关闭
rm -r ./tmp # 删除 tmp 文件,注意这会删除 HDFS中原有的所有数据
./bin/hdfs namenode -format # 重新格式化名称节点
./sbin/start-dfs.sh # 重启
cd /usr/local/hadoop
./bin/hdfs dfs -mkdir -p /user/hadoop
cd /usr/local/hadoop
./bin/hdfs dfs -mkdir input #在HDFS中创建hadoop用户对应的input目录
./bin/hdfs dfs -put ./etc/hadoop/*.xml input #把本地文件复制到HDFS中
教材第38页
./bin/hdfs dfs -ls input
./bin/hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.3.jar grep input output 'dfs[a-z.]+'
./bin/hdfs dfs -cat output/*
./bin/hdfs dfs -rm -r output # 删除 output 文件夹
cd /usr/local/hadoop
./sbin/stop-dfs.sh
教材第39页
export PATH=$PATH:/usr/local/hadoop/sbin
export PATH=$PATH:/usr/local/hadoop/sbin:/usr/local/hadoop/bin
教材第40页
sudo vim /etc/hostname
sudo ifconfig
教材第41页
netstat -nr
教材第42页
sudo vim /etc/hosts
192.168.91.128 hadoop01
192.168.91.129 hadoop02
192.168.91.130 hadoop03
教材第43页
192.168.91.128 hadoop01
192.168.91.129 hadoop02
192.168.91.130 hadoop03
ping hadoop01 -c 3 # 只ping 3次就会停止,否则要按Ctrl+c中断ping命令
ping hadoop02 -c 3
ping hadoop03 -c 3
sudo apt-get install openssh-server
教材第44页
cd ~/.ssh # 如果没有该目录,先执行一次ssh localhost
rm ./id_rsa* # 删除之前生成的公匙(如果已经存在)
ssh-keygen -t rsa # 执行该命令后,遇到提示信息,一直按回车就可以
cat ./id_rsa.pub >> ./authorized_keys
scp ~/.ssh/id_rsa.pub hadoop@hadoop02:/home/hadoop/
scp ~/.ssh/id_rsa.pub hadoop@hadoop03:/home/hadoop/
mkdir ~/.ssh # 如果不存在该文件夹需先创建,若已存在,则忽略本命令
cat ~/id_rsa.pub >> ~/.ssh/authorized_keys
rm ~/id_rsa.pub # 用完以后就可以删掉
ssh hadoop02
ssh hadoop03
教材第45页
sudo tar -zxvf ~/Downloads/hadoop-3.3.5.tar.gz -C /usr/local # 解压到/usr/local中
cd /usr/local/
sudo mv ./hadoop-3.3.5/ ./hadoop # 将文件夹名改为hadoop
sudo chown -R hadoop:hadoop ./hadoop # 修改文件权限
export PATH=$PATH:/usr/local/hadoop/bin:/usr/local/hadoop/sbin
hadoop01
hadoop02
hadoop03
教材第46页
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://Master:9000</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>file:/usr/local/hadoop/tmp</value>
<description>Abase for other temporary directories.</description>
</property>
</configuration>
<configuration>
<property>
<name>dfs.namenode.secondary.http-address</name>
<value>Master:50090</value>
</property>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>file:/usr/local/hadoop/tmp/dfs/name</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>file:/usr/local/hadoop/tmp/dfs/data</value>
</property>
</configuration>
<configuration>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
<property>
<name>mapreduce.jobhistory.address</name>
<value>hadoop01:10020</value>
</property>
<property> <name>mapreduce.jobhistory.webapp.address</name>
<value>hadoop01:19888</value>
</property>
<property>
<name>yarn.app.mapreduce.am.env</name>
<value>HADOOP_MAPRED_HOME=/usr/local/hadoop</value>
</property>
<property>
<name>mapreduce.map.env</name>
<value>HADOOP_MAPRED_HOME=/usr/local/hadoop</value>
</property>
<property>
<name>mapreduce.reduce.env</name>
<value>HADOOP_MAPRED_HOME=/usr/local/hadoop</value>
</property>
</configuration>
教材第47页
<configuration>
<property>
<name>yarn.resourcemanager.hostname</name>
<value>hadoop01</value>
</property>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
</configuration>
cd /usr/local/hadoop
sudo rm -r ./tmp # 删除 Hadoop 临时文件
sudo rm -r ./logs/* # 删除日志文件
cd /usr/local
tar -zcf ~/hadoop.master.tar.gz ./hadoop # 先压缩再复制
cd ~
scp ./hadoop.master.tar.gz hadoop02:/home/hadoop
scp ./hadoop.master.tar.gz hadoop03:/home/hadoop
教材第48页
cd ~
sudo rm -r /usr/local/hadoop # 删掉旧的(如果存在)
sudo tar -zxf ~/hadoop.master.tar.gz -C /usr/local
sudo chown -R hadoop /usr/local/hadoop
cd /usr/local/hadoop
./bin/hdfs namenode -format
cd /usr/local/hadoop
./sbin/start-dfs.sh
./sbin/start-yarn.sh
./sbin/mr-jobhistory-daemon.sh start historyserver
cd /usr/local/hadoop
./bin/hdfs dfsadmin -report
教材第49页
hdfs dfs -mkdir -p /user/hadoop
教材第50页
hdfs dfs -mkdir input
hdfs dfs -put /usr/local/hadoop/etc/hadoop/*.xml input
hadoop jar /usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-3.1.3.jar grep input output 'dfs[a-z.]+'
stop-yarn.sh
stop-dfs.sh
mr-jobhistory-daemon.sh stop historyserver