mv: cannot stat './hadoop-3.1.3/': No such file or directory

This error message indicates that the file or directory specified in the command "mv ./hadoop-3.1.3/" does not exist in the current directory.

There could be several reasons for this error, such as:

- The file or directory was deleted or moved to a different location.
- There was a typo in the command or the file/directory name.
- The user does not have the necessary permissions to access the file/directory.

To resolve this error, you can try the following steps:

1. Check the spelling and path of the file/directory in the command. Make sure it exists in the current directory or specify the correct path to the file/directory.
2. Verify that you have the necessary permissions to access the file/directory. Use the command "ls -l" to check the file permissions and ownership.
3. If the file/directory was moved or deleted, try to locate it or restore it from a backup.

Once you have resolved the issue, you can retry the "mv" command.