CentOS Hadoop Build Preparation

Permanently modify host Name: Hostnamectl set-hostname

IP Address:

Bootproto=static

ipaddr=192.168.31.128
netmask=255.255.255.0
gateway=192.168.31.2
dns1=192.168.31.2

Java environment:
Export Java_home=/usr/java
Export JRE_HOME=/USR/JAVA/JRE
Export path= $PATH: $JAVA _home/bin: $JRE _home/bin
Export classpath=.: $JAVA _home/lib/dt.jar: $JAVA _home/lib/tools.jar: $JRE _home/lib

OPEN-JDK Uninstall:
See Rpm-qa First | grep java
The following information is displayed:
java-1.4.2-gcj-compat-1.4.2.0-40jpp.115
Java-1.6.0-openjdk-1.6.0.0-1.7.b09.el5

Unloading:
RPM-E--nodeps java-1.4.2-gcj-compat-1.4.2.0-40jpp.115
RPM-E--nodeps Java-1.6.0-openjdk-1.6.0.0-1.7.b09.el5

SSH Login without password:
SSH-KEYGEN-T RSA
Ssh-copy-id-i ~/.ssh/id_rsa.pub [email protected]

Remote replication:
Scp-r/usr/a [Email protected]:/usr/
scp/usr/a/index.html [Email protected]:/usr/a/

CentOS Hadoop Build Preparation