Linux view java jdk installation path and set environment variables

1. Check the JDK installation path and version

1.windows

echo %JAVA_HOME%: View the JDK installation path

java -version: View JDK version

2.linux

echo $JAVA_HOME

echo $PATH

java -version: View JDK version

 

2. Configure linux environment variables: (remember source .bash_profile)

1. Modify the /etc/profile file (all users globally)

        vi this file /etc/profile, add at the end of the profile file:

export JAVA_HOME=/usr/share/jdk1.6.0_20
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

2. Modify the .bash_profile file (a user authority uses these environment variables)

        Add at the end of the bash_profile file:

export JAVA_HOME=/usr/share/jdk1.6.0_20
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

3. The shell terminal executes the following commands: (temporary)

export JAVA_HOME=/usr/share/jdk1.6.0_14
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

 

3. Uninstall jdk

1. Find the _uninst subdirectory of the jdk installation directory

2. Execute the command ./uninstall.sh in the shell terminal to uninstall jdk.

 

Article source: http://blog.csdn.net/zwhfyy/article/details/8349788