Hadoop [Lesson 4]: Hadoop initialization

1. Configure Hadoop environment variables

(1) Modify the configuration file

# vi /etc/profile

Modify the following content:

export HADOOP_HOME=/usr/local/src/hadoop/hadoop-2.7.7
PATH=$PATH:$JAVA_HOME/bin:$HADOOP_HOME/bin

(2) Restart the configuration file

# source /etc/profile

(3) View the hadoop version

# hadoop version

2. Start Hadoop

(1) Format

# hdfs namenode -format

(2) Startup file

# cd sbin

# ./start-dfs.sh

# ./start-yarn.sh

(3) Check what are the current Jps processes (6)

# jps

(4) Turn off the firewall

# firewall-cmd --state

# systemctl stop firewalld.service

(5) Browser verification①
http://192.168.184.114:50070

② http://192.168.184.114:8088