Commands
Commands
Files
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 good.news
`rm' is the command to be executed on the two files
`johnny.b', and `good.news' 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.
Commands
Commands
Files