recursively

How do I delete folder recursively under Linux operating systems using a bash command line options?

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Both Linux / UNIX allows the data of a file to have more than one name in separate places in the same file system. Such a file with more than one name for the same data is called a hard-linked file. How do I create a hard link under Linux / UNIX / Apple Mac OS X / BSD operating systems?

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How do I recursively grep through all sub-directories and find files containing given text / string or words?

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How do I use chmod and chown command under Linux / Unix operating systems?

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