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 NAME     
 |  |  |  | look – find lines in a sorted list 
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 SYNOPSIS     
 |  |  |  | look [ −dfnixtc ] [ string ] [ file ] 
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 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.
 −t[c]   Character c terminates the sort key in the file. By default,
    tab terminates the key. If c is missing the entire line comprises
    the key. 
    
    
    If no file is specified, /lib/words is assumed, with collating
    sequence df.
 
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 FILES     
 SOURCE     
 SEE ALSO     
 DIAGNOSTICS     
 |  |  |  | The exit status is “not found” if no match is found, and “no dictionary”
    if file or the default dictionary cannot be opened. 
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