06. Shell Scripting Tutorial for Beginners - File test operators
Shell Script has many operators that you can use to test different aspects of a file. For example, you can use the -e operator to ensure that a file exists before deleting it. Or, you can check that a file can be written to before appending to it. By checking the feasibility of the impending file operation, you can reduce the number of errors that your program will encounter.
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