LOOK(1) LOOK(1) NAME look - find lines in a sorted list SYNOPSIS look [ -dfnixtc ] [ string ] [ file ] DESCRIPTION Look consults a sorted file and prints all lines that begin with string. It uses binary search. The following options are recognized. Options dfntc affect comparisons as in sort(1). i Interactive. There is no string argument; instead look takes lines from the standard input as strings to be looked up. x Exact. Print only lines of the file whose key matches string exactly. d `Dictionary' order: only letters, digits, tabs and blanks participate in comparisons. f Fold. Upper case letters compare equal to lower case. n Numeric comparison with initial string of digits, optional minus sign, and optional decimal point. tc `Tab character' c terminates the sort key in the file. If no file is specified, /usr/dict/words is assumed, with collating sequence df. FILES /usr/dict/words SEE ALSO sort(1), grep(1), dict(7) DIAGNOSTICS Look returns exit status 0 if string is found, 1 if not found, 2 for error.