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 dfnt 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 `Directory' 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, /lib/words is assumed, with collat- ing sequence df. FILES /lib/words SEE ALSO sort(1), grep(1) DIAGNOSTICS The exit status is "not found" if no match is found, and "no dictionary" if file or the default dictionary cannot be opened.