how to set java_home in ubuntu
#Update repo
sudo apt update
# Install java 8 from ubuntu repo
sudo apt install openjdk-8-jdk -y
#Set JAVA_HOME Path
ls /usr/lib/jvm/java-8-openjdk-amd64/
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
echo $JAVA_HOME
#Add JAVA bin directory to the PATH variable
export PATH=$PATH:$JAVA_HOME/bin
echo $PATH
java -versionset java_home permanently ubuntu
sudo gedit /etc/profile
#add following lines
JAVA_HOME=/usr/lib/jvm/{your jdk path}
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export JRE_HOME
export PATH
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