ELK (ElasticSearch, Logstash, Kibana) log environment construction (2)

1. Select the corresponding javaJDK version

    The latest ELK, each component relies on a higher version of JDK (1.8), as a test build, I choose jdk1.6+

     You can choose according to actual needs

            

1. Jdk download address

(jdk1.6 +)

http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-javase6-419409.html#jdk-6u45-oth-JPR

(jdk1.7 +)

http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html

(jdk1.8 +)

http://www.oracle.com/technetwork/java/javase/downloads/index.html

2. Select the bin file to install, or you can choose the way to decompress the compressed package

#set java environment
JAVA_HOME=/jdk/jdk1.6.0_38
PATH=$PATH:$JAVA_HOME/bin
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME CLASSPATH PATH
export JAVA_HOME
export PATH

export CLASSPATH 

save and exit

Note: It has been verified that the 1.6+ version is still low, and it needs to be adjusted to the 1.7+ version by itself.

Summary of common commands during installation

********************View jdk installation results

java -version

********************View the current jdk version
rpm -qa|grep java
echo $JAVA_HOME

**************** ****View java installation path
find / -name java
********************View java execution path
which java
*********** *********Uninstall redundant versions
For example:
uninstall the following jdk information
java-1.6.0-openjdk-1.6.0.41-1.13.13.1.el6_8.x86_64
tzdata-java-2016c-1.el6.noarch

command:
rpm -e --allmatches --nodeps java-1.6.0-openjdk-1.6.0.41-1.13.13.1.el6_8.x86_64
rpm -e --allmatches --nodeps tzdata-java-2016c-1.el6.noarch

Reference documentation:

1. Authorization explanation  http://blog.csdn.net/wlwh90/article/details/53129315