look - display lines beginning with a given string
look [-df] [-t termchar] string [file]
The look utility displays any lines in file which contain
string as a
prefix. As look performs a binary search, the lines in file
If file is not specified, the file /usr/share/dict/words is
alphanumeric characters are compared and the case of alphabetic characters
The options are as follows:
-d Dictionary character set and order, i.e., only alphanumeric characters
-f Ignore the case of alphabetic characters.
Specify a string termination character, i.e., only
in string up to and including the first occurrence
The look utility exits 0 if one or more lines were found and
if no lines were found, or >1 if an error occurred.
/usr/share/dict/words the dictionary
The original manual page stated that tabs and blank characters participated
in comparisons when the -d option was specified. This
and the current man page matches the historic implementation.
The look command appeared in Version 7 AT&T UNIX.
OpenBSD 3.6 June 14, 1993
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