setting java_home and path environmental variables in linux

Question

I downloaded java-8 and amd combined package for working with Cassandra in linux. When I run cassandra, it is showing as- Unable to find java executable. Check JAVA_HOME and PATH environment variables.

How to correctly set those variables?

Filipp Voronov · Answer 1 · 2016-10-19T07:34:30.947

2

Open ~/.bashrc and add

export JAVA_HOME=<path to your java>
export PATH=<path to your java>:$PATH

with the path where your java is and then reopen terminal or execute source ~/.bashrc

edited Oct 19 '16 at 07:34

answered Oct 19 '16 at 07:27

Filipp Voronov

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what do java_home and path variables exactly resemble and how should we set them? – Madhuri Oct 19 '16 at 07:28
you set them like i said, these are environment variables that resemble paths where programs will try to find your java. – Filipp Voronov Oct 19 '16 at 07:30
permissions denied.. is there any other option? – Madhuri Oct 19 '16 at 07:30
yes, execute it in your terminal, but you will need to execute it every time you reopen terminal (changing `.bashrc` does it instead of you) – Filipp Voronov Oct 19 '16 at 07:32

score 1 · Answer 2 · answered Oct 19 '16 at 07:47

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Correct solution is:

Open ~/.bashrc file
Add to this file 2 lines as below:

export JAVA_HOME=Path_to_Java_installation_folder
export PATH=$JAVA_HOME/bin:$PATH

in the bottom.

Logoff and login again, then check the result.

answered Oct 19 '16 at 07:47

Khanh Nguyen

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score 1 · Answer 3 · edited May 23 '17 at 10:27

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To setup environment variable just follow some steps from root user:

# vi /etc/profile.d/java.sh

Add the following lines to the java.sh file-

export JAVA_HOME=/usr/java/default
export PATH=$JAVA_HOME/bin:$PATH

After adding those lines to java.sh, save and exit. Then-

# source /etc/profile.d/java.sh

For cassandra environment variable setup: https://stackoverflow.com/a/39940053/4610541

edited May 23 '17 at 10:27

Community

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answered Oct 19 '16 at 08:26

Anower Perves

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Thanks.... helped me – Anil Nivargi Mar 12 '19 at 07:05

score 0 · Answer 4 · answered Oct 19 '16 at 07:31

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sudo vim /etc/profile

add at the last sucu as: export JAVA_HOME=/home/software/jdk1.8.0_71

export PATH=$JAVA_HOME/bin:$PATH

answered Oct 19 '16 at 07:31

flgang

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score 0 · Answer 5 · answered Oct 19 '16 at 07:32

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You can add this code to /etc/profile file

JAVA_HOME=<Path to JDK folder>
JRE_HOME=$JAVA_HOME/jre
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME
export JRE_HOME
export PATH

You can refer to this article Install JDK in ubuntu

answered Oct 19 '16 at 07:32

Sachin Mesare

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setting java_home and path environmental variables in linux

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