Unix Shell Scripting Tutorial
Short summary:
short tutorial, you should read the man page for your shell to get a more Shell Programming tutorial. Unix Shell Scripting Tutorial. 8 ...
Long summary:
By default a normal command accepts input from standard input, which we abbreviate to stdin, standard input is the command line
in the form of arguments passed to the command. By default a normal command directs its output to standard output, which we
abbreviate to stdout, standard output is usually the console display. For some commands this may be the desired action but other
times we may wish to get our input for a command from somewhere other than stdin and direct our output to somewhere other
than stdout.
Surrounding anything within single quotes causes it to be treated as literal text that is it will be passed on exactly as intended, this
can be useful for sending command sequences to other files in order to create new scripts because the text between the single
quotes will remain untouched.
Source: supportweb.cs.bham.ac.uk
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