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?
5 Answers
Open ~/.bashrc and add
export JAVA_HOME=<path to your java>
export PATH=<path to your java>:$PATH
with the path where your java is and then reopen terminal or execute source ~/.bashrc
4 Comments
Madhuri
what do java_home and path variables exactly resemble and how should we set them?
Filipp Voronov
you set them like i said, these are environment variables that resemble paths where programs will try to find your java.
Madhuri
permissions denied.. is there any other option?
Filipp Voronov
yes, execute it in your terminal, but you will need to execute it every time you reopen terminal (changing
.bashrc does it instead of you)Correct solution is:
- Open ~/.bashrc file
- Add to this file 2 lines as below:
export JAVA_HOME=Path_to_Java_installation_folder export PATH=$JAVA_HOME/bin:$PATH
in the bottom.
Logoff and login again, then check the result.
Comments
To setup environment variable just follow some steps from root user:
# vi /etc/profile.d/java.sh
Add the following lines to the java.sh file-
export JAVA_HOME=/usr/java/default
export PATH=$JAVA_HOME/bin:$PATH
After adding those lines to java.sh, save and exit. Then-
# source /etc/profile.d/java.sh
For cassandra environment variable setup: https://stackoverflow.com/a/39940053/4610541
Comments
sudo vim /etc/profile
add at the last sucu as: export JAVA_HOME=/home/software/jdk1.8.0_71
export PATH=$JAVA_HOME/bin:$PATH
Comments
You can add this code to /etc/profile file
JAVA_HOME=<Path to JDK folder>
JRE_HOME=$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
