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Shell Programming and Scripting
print selected lines
Post 302139551 by rein on Monday 8th of October 2007 04:51:47 AM
10-08-2007
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1. Shell Programming and Scripting
Hi everybody:
Could anybody tell me how I can print from a file a selected rows with awk. In my case I only want print in another file all the rows from NR=8 to NR=2459 and the increment each 8 times.
I tried to this:
awk '{for (i=8; i=2459; i+=8); NR==i}' file1 > file2
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Hi can anyone assist me on my problem.
I try to grep 1 word in 1 line data. Example like below.
* Data below located in a.txt, i just wanna grep just processing-time = "12"
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Hi,
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I am trying to print 1st, 2nd, 13th and 14th fields of a file of line numbers from 29 to 10029. I dont know how to put this in one code. Currently I am removing the selected lines by
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Hi all,
This should be very easy but I can't figure it out...
I have a file that looks like this:
@SRR057408.1 FW8Y5CK02R652T length=34
AGCAGTGGTATCAACGCAGAGTAAGCAGTGGTAT
+SRR057408.1 FW8Y5CK02R652T length=34
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I need to extract selected lines from a log file, I can use grep to pull one line matching 'x' or matching 'y', how can I run through the log printing both matching lines in order top to bottom.
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this works:
cat file.txt| awk 'NR==45,NR==55'
but how do I assign variables instead of numbers:
this does not work:
cat file.txt | awk 'NR==$start,NR==$end'
there need variables instead of numbers
Sorry for my English
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HI,
I am using below command to display the words, but i am getting awk error. Please help me out on this
I am using below code
i am getting error as
If i use below code i am getting below OP
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I need help on a complicated file that I am working on. I wanted to extract important info from a very huge file. It is space delimited file. I have hundred thousands of records in this file. An example content of the inputfile as below:-
##
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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)