添加用户及无密码访问    添加用户 adduser hadoop    设置密码 passwd hadoop    添加到sudo用户组    chmod +w /etc/sudoers    echo '%hadoop ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers    chmod -w /etc/sudoers    su hadoop    ssh-keygen -t rsa机器互通安装maven    sudo mkdir -p /opt/maven    sudo chown -R hadoop:hadoop /opt/maven    tar zxvf apache-maven-3.1.1-bin.tar.gz -C /opt/maven/安装JDK    sudo mkdir -p /opt/java    sudo chown -R hadoop:hadoop /opt/java    tar zxvf jdk-7u45-linux-x64.tar.gz -C /opt/java/配置环境变量    sudo vim /etc/profile    export JAVA_HOME=/opt/java/jdk1.7.0_45    export MAVEN_HOME=/opt/maven/apache-maven-3.1.1    export PATH=$JAVA_HOME/bin:$MAVEN_HOME/bin:$PATH    安装protobuf    wget https://protobuf.googlecode.com/files/protobuf-2.5.0.tar.bz2    sudo mkdir -p /opt/protobuf    sudo chown -R hadoop:hadoop /opt/protobuf    tar jxvf protobuf-2.5.0.tar.bz2 -C /opt/protobuf    sudo yum install gcc    cd /opt/protobuf/protobuf-2.5.0    ./configure    make    sudo make check    sudo make install    protoc --version安装hadoop 2.2.0    tar zxvf hadoop-2.2.0-src.tar.gz打补丁    cd hadoop-2.2.0-src    wget https://issues.apache.org/jira/secure/attachment/12614482/HADOOP-10110.patch    patch -p0编译    mvn clean install -DskipTests编译本地包    sudo yum install cmake ncurses-devel openssl-devel -y    mvn package -Pdist,native -DskipTests -Dtar校验安装成功    cd /home/hadoop/hadoop-2.2.0-src/hadoop-dist/target/hadoop-2.2.0    bin/hadoop version加快其它机器编译速度    scp -r ~/.m2/ kn02:~/
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