Configuring linux environment variables

Configuring the system environment variables

vi /etc/environtment

//加入
export JAVA_HOME=/usr/local/java/jdk1.8.0_231
export JRE_HOME=/usr/local/java/jdk1.8.0_231/jre
export CLASSPATH=$CLASSPATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin

User environment variables

vi /etc/profile

//在中间加入
export JAVA_HOME=/usr/local/java/jdk1.8.0_231
export JRE_HOME=/usr/local/java/jdk1.8.0_231/jre
export CLASSPATH=$CLASSPATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOME/bin

The environment configuration to take effect

source /etc/profile
java -version