January 2003
Intermediate to advanced
832 pages
32h 40m
English
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Name
look
Synopsis
look [options]string[file]
Looks through a sorted file and prints all lines that begin with
string. Words may be up to 256 characters long.
This program is potentially faster than fgrep
because it relies on the file being already
sorted, and can thus do a binary search through the file, instead of
reading it sequentially from beginning to end.
With no file, look searches
/usr/share/dict/words (the spelling dictionary)
with options -df.
Options
-
-d Use dictionary order. Only letters, digits, space, and tab are used in comparisons.
-
-f Fold case; ignore case distinctions in comparisons.
-
-tchar Use char as the termination character, i.e., ignore all characters to the right of char.