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Full Discussion: print lines from a file containing key word
Top Forums Shell Programming and Scripting print lines from a file containing key word Post 302435526 by cjcox on Wednesday 7th of July 2010 02:11:48 PM
Old 07-07-2010
For a sequential unsorted search, it doesn't get any faster than doing a simple pattern match. There's just no shortcut.... you could try reading the entire file into memory and searching through that... (just an idea of how you can make it faster by not using the disk).

Alternatively, you can look into a preprocessor for the file that creates indexes into the data (usually means sorting... but there are free-text indexers out there)... man are search engine like indexers... so they just are used to find full files containing matches... but look around... you never know.

Your file data looks like a spreadsheet csv... so maybe importing it as a spreadsheet might give you some advantage (??).

Just some ideas...
 

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LEARN ABOUT REDHAT

wc

WC(1)									FSF								     WC(1)

NAME

       wc - print the number of bytes, words, and lines in files

SYNOPSIS

       wc [OPTION]... [FILE]...

DESCRIPTION

       Print  byte, word, and newline counts for each FILE, and a total line if more than one FILE is specified.  With no FILE, or when FILE is -,
       read standard input.

       -c, --bytes
	      print the byte counts

       -m, --chars
	      print the character counts

       -l, --lines
	      print the newline counts

       -L, --max-line-length
	      print the length of the longest line

       -w, --words
	      print the word counts

       --help display this help and exit

       --version
	      output version information and exit

AUTHOR

       Written by Paul Rubin and David MacKenzie.

REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.
       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.

SEE ALSO

       The full documentation for wc is maintained as a Texinfo manual.  If the info and wc programs are properly installed at your site, the com-
       mand

	      info wc

       should give you access to the complete manual.

wc (coreutils) 4.5.3						   February 2003							     WC(1)
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