04-09-2010
Quote:
Originally Posted by
thegeek
Yes, z commands have power. You can do zgrep directly, instead of cat & grep.
Refer: The Power of Z Commands – Zcat, Zless, Zgrep, Zdiff Examples (link removed)
Thank you for the advice. I guess I don't have bzgrep installed. I tried using zgrep, but that is actually slower than bzcat piped to grep.
The latter is definitely much faster than my original loop, but still too slow.
I am quite new to all this, so sorry if I am sounding rather amateurish (I am indeed that).
In each of my files, the relevant lines are always the same ones - as a means of an example, say I want to extract lines 5, 17, 38, ... from each of the files. So supposing I can identify which the real line numbers are, would there be a better way to extract them than to use grep. It seems not very efficient to have grep search every file if in effect it is known exactly which lines are needed.
Thank you again and sorry if there is an obvious answer.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
PROJECT: Extracting data from an employee timesheet. The timesheets are done in excel (for user ease) and then converted to .csv files that look like this (see color code key below):
,,,,,,,,,,,,,,,,,,,
9/14/2003,<-- Week Ending,,,,,,,,,,,,,,,,,,
Craig Brennan,,,,,,,,,,,,,,,,,,,... (3 Replies)
Discussion started by: kregh99
3 Replies
2. Shell Programming and Scripting
frnds,
I m having prob woth doing some 2-3 task simultaneously...
what I want is...
I have lots ( lacs ) of files in a dir...
I want.. these info from arround 2-3 months files
filename convention is - abc20080403sdas.xyz ( for todays files )
I want
1. total no of files for 1 dec... (1 Reply)
Discussion started by: clx
1 Replies
3. Shell Programming and Scripting
Hi,
I have a file that has got compressed data. I would want to uncompress the packed decimal data(not the file). is there a way to do that in ksh? (6 Replies)
Discussion started by: ahmedwaseem2000
6 Replies
4. UNIX for Dummies Questions & Answers
Hi,
I have several files that look like this:
File1.txt
Data1
Data2
Data20
File2.txt
Data1
Data5
Data10
File3.txt
Data1
Data2
Data17
File4.txt (6 Replies)
Discussion started by: Fahmida
6 Replies
5. Shell Programming and Scripting
Hi,
I am trying to extract data from multiple output files.
I am able to extract the data from a single output file by
using the following awk commands:
awk '/ test-file*/{print;m=0}' out1.log > out1a.txt
awk '/ test-string/{m=1;c=0}m&&++c==3{print $2 " " $3 " " $4 ;m=0}' out1.log >... (12 Replies)
Discussion started by: p_sun
12 Replies
6. UNIX for Dummies Questions & Answers
Hi,
I have several hundreds of PDFfiles number 01.pdf, 02.pdf, 03.pdf, etc in one folder. These are vey long documentd with a lot of information (text, tables, figures, etc). I need to extract the information asociated with one disease in particular (Varicella). The information I need to... (5 Replies)
Discussion started by: Xterra
5 Replies
7. Shell Programming and Scripting
Hi
I am trying to extract data from within a log file and output format to a new file for further manipulation can someone provide script to do this?
For example I have a file as below and just want to extract all delimited variances of tag 32=* up to the delimiter "|" and output to a new file... (2 Replies)
Discussion started by: Buddyluv
2 Replies
8. Programming
Hello,
I have two files.
File 1 is a list of interested IDs
Ex1
Ex2
Ex3File 2 is the original file with over 8000 columns and 20 millions rows and is a compressed file .gz
Ex1 xx xx xx xx ....
Ex2 xx xx xx xx ....
Ex2 xx xx xx xx ....Now I need to extract the information for all the IDs of... (4 Replies)
Discussion started by: nans
4 Replies
9. Shell Programming and Scripting
I have a series of csv files in the following format
eg file1
Experiment Name,XYZ_07/28/15,
Specimen Name,Specimen_001,
Tube Name, Control,
Record Date,7/28/2015 14:50,
$OP,XYZYZ,
GUID,abc,
Population,#Events,%Parent
All Events,10500,
P1,10071,95.9
Early Apoptosis,1113,11.1
Late... (6 Replies)
Discussion started by: pawannoel
6 Replies
10. Shell Programming and Scripting
Hi All,
I have log files as below.
log1.txt
<table name="content_analyzer" primary-key="id">
<type="global" />
</table>
<table name="content_analyzer2" primary-key="id">
<type="global" />
</table>
Time taken: 1.008 seconds
ID = gd54321bbvbvbcvb
<table name="content_analyzer"... (7 Replies)
Discussion started by: ROCK_PLSQL
7 Replies
LEARN ABOUT DEBIAN
dh_compress
DH_COMPRESS(1) Debhelper DH_COMPRESS(1)
NAME
dh_compress - compress files and fix symlinks in package build directories
SYNOPSIS
dh_compress [debhelperoptions] [-Xitem] [-A] [file...]
DESCRIPTION
dh_compress is a debhelper program that is responsible for compressing the files in package build directories, and makes sure that any
symlinks that pointed to the files before they were compressed are updated to point to the new files.
By default, dh_compress compresses files that Debian policy mandates should be compressed, namely all files in usr/share/info,
usr/share/man, files in usr/share/doc that are larger than 4k in size, (except the copyright file, .html and other web files, image files,
and files that appear to be already compressed based on their extensions), and all changelog files. Plus PCF fonts underneath
usr/share/fonts/X11/
FILES
debian/package.compress
These files are deprecated.
If this file exists, the default files are not compressed. Instead, the file is ran as a shell script, and all filenames that the shell
script outputs will be compressed. The shell script will be run from inside the package build directory. Note though that using -X is a
much better idea in general; you should only use a debian/package.compress file if you really need to.
OPTIONS
-Xitem, --exclude=item
Exclude files that contain item anywhere in their filename from being compressed. For example, -X.tiff will exclude TIFF files from
compression. You may use this option multiple times to build up a list of things to exclude.
-A, --all
Compress all files specified by command line parameters in ALL packages acted on.
file ...
Add these files to the list of files to compress.
CONFORMS TO
Debian policy, version 3.0
SEE ALSO
debhelper(7)
This program is a part of debhelper.
AUTHOR
Joey Hess <joeyh@debian.org>
9.20120909 2012-05-19 DH_COMPRESS(1)