Linux logon-general Linux technology-Linux programming and kernel information. For more information, see the following section. Yesterday, jdk was installed in linux and environment variables were configured. A problem occurred between them: My configuration method is:
Use the command vi/etc/profile to open the vi editor and edit the following content:
Press ESC to exit the VI editor, and enter wq to save. however, neither java-version nor javac can be entered in the pipeline, at last, enter the command source/etc/profile in sources and enter java-version and javac again. Then I can see what I want to see. the environment variable is successfully configured. but now the problem is that all the files in/etc are missing. there is no problem without shutting down the system.
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