Hadoop pseudo-distribution installation steps, hadoop Installation Steps

Hadoop pseudo-distribution installation steps, hadoop Installation Steps
2. steps for installing hadoop pseudo-distribution: 1.1 set the static IP address icon in the upper-right corner of the centos desktop, right-click to modify and restart the NIC, and run the Command service network restart for verification: ifconfig 1.2 modify the host name <1> modify the host name in the current session, execute the command hostname hadoop <2> modify the host name in the configuration file, and execute the command vi/etc/sysconfig/network for verification: restart machine 1.3 and bind the hostname and ip address. Run the command vi/etc/hosts and add a line 192.168.80.100 hodoop for verification: ping hadoop 1.4 to disable the firewall and run the Command service iptables stop for verification: service iptables status 1.5 shut down the firewall automatically run command chkconfig iptables off verification: chkconfig -- list | Grep iptables 1.6 SSH (secure shell) <1> execute the command ssh-keygen-t rsa to generate the key located in ~ /. Ssh <2> Run Command cp ~ /. Ssh/id_rsa.pub ~ /. Ssh/authorized_keys Verification: install jdk in ssh localhost 1.7 <1> run the rm-rf * command to delete all files <1> Use winscp to copy the jdk file to the/usr/local directory <2> RUN chomd u + x jdk -..... grant permissions <3> execute commands. /jdk .... decompress <4> run the command mv jdk -.... Jdk rename <5> Execute Command vi/etc/profile to set the environment variable, add two lines of content: export JAVA_HOME =/usr/local/jdk export PATH =.: $ JAVA_HOME/bin: $ PATH save exit Execute Command source/etc/profile to make the settings take effect verification: java-version1.8 install hadoop 1. execute the command tar-zxvf hadoop-1 ..... 2. execute the command mv rename 3. run the command vi/etc/profile to set the environment variable and add one line of content: export JAVA_HOME =/usr/local/jdk export PATH =.: $ JAVA_HOME/bin: $ PATH save and exit. Run the command source/etc/profile to make the settings take effect. 4. modify the hadoop configuration file at $ HADOOP_HOME /Conf hdfs-site.xml hadoop-env.sh mapred-site.xml core-site.xml 4 files 5. format hadoop execution command hadoop namenode-format 6. start hadoop Execute Command start-all.sh verification :( 1) Execute Command jps to find 5 java Process distribution is namenode .... (2) Access http: // hadoop: 50070/dfshealth through a browser. jsp http: // hadoop: 50030/jobtracker. modify C in windows Using jsp: \ WINDOWS \ system32 \ drivers \ etc host 1.9 NameNode process not started no formatting configuration file only copy not modifying hostname not binding to Ip ssh password-free configuration not configured successfully 2.0 multiple formatting hadoop is also incorrect? Method to delete the/usr/local/hadoop/tmp file and format it again