ow do I delete folder recursively under Linux operating systems using a bash command line options?
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?
How do I recursively grep through all sub-directories and find files containing given text / string or words?
How do I use chmod and chown command under Linux / Unix operating systems?