Need help on getting the first few characters of a file.
Friends ,
I need some help in writing a shell script to get the first few characters from a file for all the lines in that file.
Here is sample data inthe file.
I want the ouput as
It doesn't have any fixed length,the only thing I can say is the first I need all the caracters until it first hits 2 spaces from each line in the file.
Last edited by Scott; 06-17-2010 at 01:57 PM..
Reason: Code tags, please...
Hi
I was wondering if it's possible to use a command to get the first 3 characters of a line in a text file, I tried grep but it returns the whole line but I am only interested in the first 3 characters. Is this possible with grep or I need any other command?
Also is it possible deleting from... (2 Replies)
I'm looking to determine if I can use a grep command to read file and rename the file based on the first 3 characters of the data in the file.
An example is:
Read FileA
If the first 3 positions of the data in the file are "ITP", then rename the file as FileA_ITP, else if the first 3... (3 Replies)
hi
I copied a file to unix box from windows.
When i run this file it throws error on every command written in that file.
The reason is that the file contains some \r charecters that came into picture while copying the file.
This could be viewed by using od -c command.
My question is that... (2 Replies)
Hi guys,
Hope you are all well.
This is a line of data from a csv file. I have used vi and set the 'set list' option to display the trailing $ character.
"01","Grocery","01006","eat Fish & Spreads"$
I have tried the following commands, but neither of them appear to be working?
1) tr... (13 Replies)
Hi Experts,
I am working on HP-UX. I am new to shell scripting. I would like to have a shell script which will prefix:
1. "H|" before first row of my file and,
2. "T" for all other rows of the file.
For Example - File before running the script 20100430|4123451810|218.50|TC
20100430 ... (4 Replies)
Hello,
I tried with this command,it's working fine,file contains huge data it's not removing the control+M character
dos2unix test1.txt test2.txt
Please help me,is there any other option.
:wall:
Thanks,
Murali
---------- Post updated at 06:41 AM ---------- Previous update... (6 Replies)
sed -e "s// /g" old.txt > new.txt
While I do know some control characters need to be escaped, can normal characters also be escaped and still work the same way? Basically I do not know all control characters that have a special meaning, for example, ?, ., % have a meaning and have to be escaped... (11 Replies)
I need a scripting AWK to compare 2 files.
file 1 and 2 are list of keywords
1 is
a
b
c
d
2 is
aa
aaa
b
bb
ccc
d
I want the AWK script to give us the number of times every keyword in file 1 occurs in file 2.
output should be
a 2 (7 Replies)
I have a .CSV file when I check for the special characters in the file using the command cat -vet filename.csv, i get very lengthy lines with "^@", "^I^@" and "^@^M" characters in between each alphabet in all of the records. Using the code below file filename.csv I get the output as
I have a... (2 Replies)
I have this fastq file:
@M04961:22:000000000-B5VGJ:1:1101:9280:7106 1:N:0:86
GGGGGGGGGGGGCATGAAAACATACAAACCGTCTTTCCAGAAATTGTTCCAAGTATCGGCAACAGCTTTATCAATACCATGAAAAATATCAACCACACCA
+test-1
GGGGGGGGGGGGGGGGGCCGGGGGFF,EDFFGEDFG,@DGGCGGEGGG7DCGGGF68CGFFFGGGG@CGDGFFDFEFEFF:30CGAFFDFEFF8CAF;;8... (10 Replies)
Discussion started by: Xterra
10 Replies
LEARN ABOUT MOJAVE
io::digest
IO::Digest(3) User Contributed Perl Documentation IO::Digest(3)NAME
IO::Digest - Calculate digests while reading or writing
SYNOPSIS
use IO::Digest;
# Get a Digest::MD5 object that takes input while $fh being written or read
my $fh;
my $iod = IO::Digest->new ($fh, 'MD5');
print $fh "fooo";
print $iod->hexdigest
DESCRIPTION
This module allows you to calculate digests while reading or writing file handles. This avoids the case you need to reread the same
content to compute the digests after written a file.
TEST COVERAGE ----------------------------------- ------ ------ ------ ------ ------ ------
File stmt branch cond sub time total
----------------------------------- ------ ------ ------ ------ ------ ------
blib/lib/IO/Digest.pm 100.0 n/a n/a 100.0 100.0 100.0
Total 100.0 n/a n/a 100.0 100.0 100.0
----------------------------------- ------ ------ ------ ------ ------ ------
AUTHORS
Chia-liang Kao <clkao@clkao.org>
COPYRIGHT
Copyright 2004 by Chia-liang Kao <clkao@clkao.org>.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
See <http://www.perl.com/perl/misc/Artistic.html>
perl v5.18.2 2013-02-16 IO::Digest(3)