03-27-2014
I suggest you write a script that accepts an input, lets call it OPT1, then grep that value in your file, and displays what is found.
Once that is achieved, You explain from the result what more you want...
So far for this script you need a read and grep , perhaps should we have an if if grep returns nothing...
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LOOK(1) BSD General Commands Manual LOOK(1)
NAME
look -- display lines beginning with a given string
SYNOPSIS
look [-dfa] [-t termchar] string [file]
DESCRIPTION
The look utility displays any lines in file which contain string as a prefix. As look performs a binary search, the lines in file must be
sorted (where sort(1) got the same options -d and/or -f that look is invoked with).
If file is not specified, the file /usr/share/dict/words is used, only alphanumeric characters are compared and the case of alphabetic char-
acters is ignored.
Options:
-d Dictionary character set and order, i.e. only alphanumeric characters are compared.
-f Ignore the case of alphabetic characters.
-a Use the alternate dictionary /usr/share/dict/web2
-t Specify a string termination character, i.e. only the characters in string up to and including the first occurrence of termchar are
compared.
The look utility exits 0 if one or more lines were found and displayed, 1 if no lines were found, and >1 if an error occurred.
FILES
/usr/share/dict/words the dictionary
/usr/share/dict/web2 the alternate dictionary
SEE ALSO
grep(1), sort(1)
COMPATIBILITY
The original manual page stated that tabs and blank characters participated in comparisons when the -d option was specified. This was incor-
rect and the current man page matches the historic implementation.
HISTORY
Look appeared in Version 7 AT&T Unix.
BSD
June 14, 1993 BSD