1）進入存放jdk文件的文件夾路徑
我這里是 usr/local/jdk/
2)輸入命令 chmod 777 jdk1.8.0_221/bin/java修改權限
3）再次輸入 java -version 成功
轉載於：https://blog.csdn.net/weixin_43748192/article/details/100119578
-bash: /home/java/jdk1.8.0_221/bin/java: 權限不夠
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