Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Piping GREP
Top Forums UNIX for Dummies Questions & Answers Piping GREP Post 302282311 by mojoman on Friday 30th of January 2009 01:58:00 PM
Old 01-30-2009
Quote:
Originally Posted by Corona688
Code:
$ echo 'BOB SMITH' > file
$ grep BOB < file | grep SMITH
BOB SMITH
$

I repeat:

There's no reason your first version shouldn't work. Could you post some data from the input file, and the version of yours that didn't work?
GNU grep 2.5.3

Copyright (C) 1988, 1992-2002, 2004, 2005 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 PARTICULAR PURPOSE.
---------
What you posted above works but I have some questions/concerns:

1) What is the "<" character for? When I tried out your code I left it out and the code executed fine so I am wondering if it is really necessary.
2) When I create a file and put BOB on one line and SMITH on the other your code fails. Why? It is this type of situation I have problems with.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

piping the output of find command to grep

Hi, I did not understand why the following did not work out as I expected: find . -name "pqp.txt" | grep -v "Permission" I thought I would be able to catch whichever paths containing my pqp.txt file without receiving the display of messages such as "find: cannot access... Permisson... (1 Reply)
Discussion started by: 435 Gavea
1 Replies

2. Shell Programming and Scripting

question about grep, cut, and piping

Howdy folks, I am fairly new to scripting but have lost of expirience in c++, pascal, and a few other. I am trying to complete a file search script that is sent a file name containing data to search that is arranged like this "id","name","rating" "1","bob","7" etc and an argument to... (1 Reply)
Discussion started by: dyrt
1 Replies

3. Shell Programming and Scripting

Grep causing long delay (batching) whilst piping

Hi all. I have a problem at work which I have managed to break down into a simple test scenario: I have written a monitoring script that outputs every second the status of various processes, but for now, lets just print the date input.sh: while true do date sleep 1 done This... (9 Replies)
Discussion started by: spudtheimpaler
9 Replies

4. Shell Programming and Scripting

Piping STDOUT as pattern to grep or sed

$>cat file.txt 123 d3 234 abc 3 zyf 23 124 def 8 ghi kz0 ... ... I have the following output on the screen through <some command>. $> <some command> abc def ghi ... ... I have to search for each of these patterns in the file.txt and print the lines in file.txt matching the... (4 Replies)
Discussion started by: VNR
4 Replies

5. Ubuntu

Piping with grep

Hi everybody, I have a big file with blast results (if you know what this means, otherwise look at it just as a text file with a specific form). I am trying to extract some ids from within this file, which have certain parameters. For example, some Of my IDs have the term 'No hit results'... (1 Reply)
Discussion started by: frymor
1 Replies

6. Ubuntu

Piping with grep

Hi everybody, I have a big file with blast results (if you know what this means, otherwise look at it just as a text file with a specific form). I am trying to extract some ids from within this file, which have certain parameters. For example, some Of my IDs have the term 'No hit results'... (6 Replies)
Discussion started by: frymor
6 Replies

7. Shell Programming and Scripting

piping from grep to awk without intermediate files

I am trying to extract the file names alone, for example "TVLI_STATS_NRT_XLSTWS03_20120215_132629.csv", from below output which was given by the grep. sam:/data/log: grep "C10_Subscribe.000|subscribe|newfile|" PDEWG511_TVLI_JOB_STATS.ksh.201202* Output: ... (6 Replies)
Discussion started by: siteregsam
6 Replies

8. UNIX for Dummies Questions & Answers

Piping grep into awk, read the next line using grep

Hi, I have a number of files containing the information below. """"" Fundallinfo 6.3950 14.9715 14.0482 """"" I would like to grep for Fundallinfo and use it to read the next line? I ideally would like to read the three numbers that follow in the next line and... (2 Replies)
Discussion started by: Paul Moghadam
2 Replies

9. Shell Programming and Scripting

Piping through grep/awk prevents file write

So, this is weird... I'm running this command: iotop -o -P -k -bt -d 5 I'd like to save the output relelvant to rsyslogd to a file, so I do this: iotop -o -P -k -bt -d 5 | grep rsyslogd >> /var/log/rsyslogd Nothing is written to the file! I can write the full output to the file: ... (2 Replies)
Discussion started by: treesloth
2 Replies

10. OS X (Apple)

Piping to grep with pbpaste

cat file 1 aaa 2 bbb 3 ccc 4 ddd In TextEdit, I then copy the characters “ccc” to the clipboard. The problem is that the following command gives no output: bash-3.2$ pbpaste | grep - file Desired output: 3 ccc What should the syntax be for that command? I am using MacOS El... (3 Replies)
Discussion started by: palex
3 Replies

LEARN ABOUT SUNOS

config.sub

CONFIG.SUB(1)							   User Commands						     CONFIG.SUB(1)

NAME

       config.sub - validate and canonicalize a configuration triplet

SYNOPSIS

       config.sub [OPTION] CPU-MFR-OPSYS or ALIAS

DESCRIPTION

       Canonicalize a configuration name.

   Operation modes:
       -h, --help
	      print this help, then exit

       -t, --time-stamp
	      print date of last modification, then exit

       -v, --version
	      print version number, then exit

REPORTING BUGS

       Report bugs and patches to <config-patches@gnu.org>.

COPYRIGHT

       Copyright 1992-2016 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

       autoconf(1), automake(1), autoreconf(1), autoupdate(1), autoheader(1), autoscan(1), config.guess(1), config.sub(1), ifnames(1), libtool(1).

GNU Autoconf 2.69						    August 2017 						     CONFIG.SUB(1)
All times are GMT -4. The time now is 08:20 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy