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Full Discussion: Help with using different types of GREP
Homework and Emergencies Homework & Coursework Questions Help with using different types of GREP Post 302576622 by SilvarHawke on Friday 25th of November 2011 10:44:27 AM
Old 11-25-2011
Well if its alright then I may as well as them. I'm curently working through the same worksheet only I have moved onto advanced grep, and there are two questions in it that have me puzzled. Here they are.

Quote:
j) Find out which models of car do NOT contain a digit within their name. Where (line position) within the file are the cars which do have digits within their model name?

m) Find any car model names which include “ee”, without explicitly including “ee”
within your search pattern. Hint: Use curly { } brackets

n) Find out all car models beginning with “B”, and redirect these to a file called
“alpha-carslist.txt”. Append to this file, all car models beginning with “C”. How
many records are in the above file? (Hint: use the “wc -l” command)
And just to show you the layout of how the car list looks like, here are the first few lines, not all of them just in case it seems like too much.

Quote:
Ford:Mondeo:1997:Blue:5
Vauxhall:Vectra:1999:White:2
Seat:Ibiza:1996:Red:4
Peugeot:406:1999:Silver:1
McLaren:F1:1997:Black:2
Skoda:Octavia:2003:Silver:2
Peugeot:206:2000:Red:1
Even with the hints for m & n I'm still having trouble with what comands I should be using, all I know is that I have been using a format such as this for the most recent questions and answers.

Quote:
cat carslist.txt | grep '.*:.*:.*:.*:.*$'
or something similar anyway. Some more help on these would be greatfully appreciated. =-)
 

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LEARN ABOUT DEBIAN

car

car(1)								   GNU Telephony							    car(1)

NAME

       car - crytographic archiver.

SYNOPSIS

       car [options] [paths...]
       car --decode [.carfile]

DESCRIPTION

       Creates	and  decodes portable cross-platform crytographic archives.  An archive can be a collection of files, or an in-stream message that
       is piped.  Output can be to a binary .car file, or ascified text.  A symetric cipher is used, and the passhrase is hashed to form a key.

OPTIONS

       --cipher=name
	      Specify symetric cipher.	By default 256 bit aes is used.

       --decrypt
	      Specify decryption operation on an existing car stream or file.  If no file is specified, stdin is used.

       --digest=name
	      Specify name of digest algorithm.  By default sha will be used.

       --follow
	      Dereference and follow symlinks.	Otherwise they are ignored.

       --output=filename
	      Specify output file for a new archive.  By default stdout is used.

       --overwrite
	      Always overwrite existing files without prompting.

       --quiet
	      Non-interactive and no status output.

       --recursive
	      If argument is a directory, recursively scan directory and any subdirectory contents as arguments.

       --help Outputs help screen for the user.

AUTHOR

       car was written by David Sugar <dyfet@gnutelephony.org>.

REPORTING BUGS

       Report bugs to bug-commoncpp@gnu.org.

COPYRIGHT

       Copyright (C) 2010 David Sugar, Tycho Softworks.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

GNU uCommon							   January 2010 							    car(1)
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