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 `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, is assumed, with collating sequence
df.
FILES
SEE ALSO
sort(1), gre(1), dict(7)
DIAGNOSTICS
Look returns exit status 0 if string is found, 1 if not
found, 2 for error.