Introduction to the Unix Cluster. Node: UNIXCom

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UNIX Command Format

UNIX system commands are words that may be followed by any combination of options (a `-' followed by a letter), an expression, and/or filenames. Options modify the action of the command in some way, or tell the command exactly how to operate. The filename is the name of the file which the command is to modify in some way. Expressions describe a character string which is used as input to the command. In the example,

        [lyman|5] rm -fr johnny.b

`rm' is the command to be executed on the two files `johnny.b', and `' with the two options `f' and `r'. Generally the order of the arguments following the commands is command options expression filename(s), but be sure to see man command for more information about each specific command and available command options.

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