`test': Check file types and compare values =========================================== `test' returns a status of 0 (true) or 1 (false) depending on the evaluation of the conditional expression EXPR. Each part of the expression must be a separate argument. `test' has file status checks, string operators, and numeric comparison operators. Because most shells have a built-in command by the same name, using the unadorned command name in a script or interactively may get you different functionality than that described here. Besides the options below, `test' accepts a lone `--help' or `--version'. Note: Common options. A single non-option argument is also allowed: `test' returns true if the argument is not null.
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