之前将jdk解压后,然后卸载了安装的jdk,最后修改了/etc/profile,执行source /etc/profile,查看jdk是否安装成功时,发现失败,没有Java这个命令。。。。囧。。。囧
翻了以前的文档,执行以下操作:
sudo update-alternatives --install /usr/bin/java java /home/hadoop/BigDate/jdk1.8.0_11/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /home/hadoop/BigDate/jdk1.8.0_11/bin/javac 300
sudo update-alternatives --install /usr/bin/jar jar /home/hadoop/BigDate/jdk1.8.0_11/bin/jar 300
sudo update-alternatives --install /usr/bin/javah javah /home/hadoop/BigDate/jdk1.8.0_11/bin/javah 300
sudo update-alternatives --install /usr/bin/javap javap /home/hadoop/BigDate/jdk1.8.0_11/bin/javap 300
sudo update-alternatives --config java
安装成功
至于原因,后续再研究。