docker安装 kali 下面再安装jdk1.8
1.下载jdk下载地址：http://java.sun.com/javase/downloads/index.jsp卸载kali自带jdksudo apt-get remove openjdk-7-jdk2.解压缩tar -xzvfjdk-8u261-linux-x64.tar.gz3.配置环境变量执行 vi ~/.bashrc ， 并添加下列内容
# install JAVA JDK
export JAVA_HOME=/opt/jdk1.8.0_91
export CLASSPATH=.:${JAVA_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
保存退出执行 source ~/.bashrc4.安装并注册update-alternatives --install /usr/bin/java java /opt/jdk1.8.0_261/bin/java 1
update-alternatives --install /usr/bin/javac javac /opt/jdk1.8.0_261/bin/javac 1
update-alternatives --set java /opt/jdk1.8.0_261/bin/java
update-alternatives --set javac /opt/jdk1.8.0_261/bin/javac
5.java -version验证
java -version
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