06-07-2011
grep first occurrence but continue to next entry in patternfile
I have 1300 files (SearchFiles0001.txt, SearchFiles0002.txt, etc.) , each with 650,000 lines, tab-delimited data.
I have a pattern file, with about 1000 lines with a single word. Each single word is found in the 1300 files once.
If I grep -f PatternFile.txt SearchFiles*.txt >OutputFile.txt
the search takes forever, because it searches 650,000 lines x 1300 files for each of the 1000 words.
If I grep -f PatternFile.txt -m 1 SearchFiles*.txt >OutputFile.txt
the search stops after the first line of PatternFile.txt, and I get an OutputFile.txt with 1300 lines: the first entry of PatternFile.txt, but none of the other 999.
How do I make the search faster (by finding the first occurrence of my search parameter, and then moving on to the next search parameter in PatternFile.txt)?
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LEARN ABOUT DEBIAN
bntext
bntext(5) File Formats Manual bntext(5)
NAME
bnmotd.txt, bnnews.txt bnissue.txt - messages for the Unix Battle.net daemon
DESCRIPTION
The file bnmotd.txt contains text displayed by bnetd(1), when users first log into the server.
The file bnnews.txt contains text displayed when the user uses the /news chat command.
The files consist of raw text with printf-style formatting escapes. Each line of a file can contain a type formatter from the following
list:
%B Use the broadcast attribute (???).
%C Execute the line as if the user entered it as a command.
%E Use the error attribute (red).
%I Use the info attribute (yellow). This is the same was %W.
%M Normal chat message (white). This will appear as if the user said it.
%T Emote chat message (???). This will appear as if the user said it.
%W Use the warning attribute (yellow). This is the same was %I.
Within a line, any of the following format formatters may be used:
%% Expand to a literal percent sign (%).
%a Expand to the number of accounts on the server.
%c Expand to the number of channels on the server. This includes all permanent and current temporary channels.
%g Expand to the number of games on the server. This includes both public and private (passworded) games.
%h Expand to the hostname of the server (as returned by gethostname(2)).
%i Expand to this user's account ID number, formatted with a leading pound (#) sign and leading zeros.
%l Expand to this user's current chat name which is usually the same
%r Expand to the IP of the remote machine (the client).
%t Expand to four character client tag.
%u Expand to the number of users logged into the server.
%v Expand to the version number of the server.
SEE ALSO
bnetd(1)
AUTHOR
Ross Combs (ross@bnetd.org)
2 August, 2001 bntext(5)