Sponsored Content
Top Forums Shell Programming and Scripting reading alternate lines of a file Post 302443500 by vidyaj on Monday 9th of August 2010 04:45:30 AM
Old 08-09-2010
explanation to answer

hello
could you please explain this command?

Code:
awk '(NR%4==1 || NR%4==0) && $0'


Last edited by Scott; 08-09-2010 at 06:22 AM.. Reason: Code tags, please...
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

alternate lines from two files

A basic request two files want to combine them but on alternate lines (1 Reply)
Discussion started by: SummitElse
1 Replies

2. UNIX for Dummies Questions & Answers

skip reading certain lines in a file

How can I exclude reading lines in a file that contains the following: filesystem:/home/pach/liv_patches 128005120 88456640 37270758 71% /home/patches That is, all lines that contain and begins with filesystem: should not be processed/read from a file (5 Replies)
Discussion started by: paulsew
5 Replies

3. Shell Programming and Scripting

alternate lines

Hi, I'm new to Unix. I want to read the all the lines from a text file and write the alternate lines into another file. Please give me a shell script solution. file1 ----- one two three four five six seven newfile(it should contain the alternate lines from the file1) ------- one... (6 Replies)
Discussion started by: pstanand
6 Replies

4. Shell Programming and Scripting

Insert string in alternate lines

Hi All, In continuation of my previous thread 'Add text at the end of line conditionally', I need to further modfiy the file after adding text at the end of the line. Now, I need to add a fixed charater string at alternate lines starting from first line using awk or sed.My file is now as below:... (10 Replies)
Discussion started by: angshuman
10 Replies

5. Shell Programming and Scripting

skip lines while reading a file

Hi Experts, I am tryin to read a file and while doing so i need to skip the lines which start with a hash (#) char. I thought of using a goto command but a lot of guys on this site say its not the good way to program. Moreover I am using a ksh shell which deos not support goto command. ... (4 Replies)
Discussion started by: bankimmehta
4 Replies

6. Shell Programming and Scripting

Regarding reading lines into a new file

Hi all, I jut use a loop to read lines from the user and redirect it to a file. echo "Enter the line" while read -r LINE do echo $LINE >> FILE if ;then break fi done input app... (1 Reply)
Discussion started by: Ananthdoss
1 Replies

7. Programming

Perl : joining alternate lines

Hi, I need to join every alternate line in a file for eg:input file $ cat abc abc def ghi jkloutput abc def ghi jklcode i wrote for this $ cat add_line.pl #!/usr/bin/perl -w my $count=1; #my $line=undef; my @mem_line; my $i=0; my $x=0; (2 Replies)
Discussion started by: sam05121988
2 Replies

8. Shell Programming and Scripting

Grep values on alternate lines

Hi, I have a file like 2011|ACC|.* 2013|ACC|.* 2011|ACCC|.* 2013|ACCC|.* 2013|ACCV|.* 2011|ADB|.* 2013|ADB|.* 2011|ADBC|.* 2013|ADBC|.* 2011|AIA|.* 2013|AXJ|.* 2013|NNN|.* .* represnts any alphanumeric characters after this part of the string I need a code to return only the... (3 Replies)
Discussion started by: sam05121988
3 Replies

9. Shell Programming and Scripting

Process alternate lines in awk/sed/perl

hi.. i have a fasta file with the following format >sequence1 CCGGTTTTCGATTTGGTTTGACT >sequence2 AAAGTGCCGCCAGGTTTTGAGTGT >sequence3 AGTGCCGCAGAGTTTGTAGTGT Now, i want to read alternate line and add "GGGGGGGGGGG" to end of every sequence Desired output: >sequence1... (4 Replies)
Discussion started by: empyrean
4 Replies

10. Shell Programming and Scripting

Comparing alternate lines of code

Hi gents, Have only a passing familiarity with linux/shell at this point, so please forgive simple question. I have text files that have lines something like the following: a b c d d d e f e f e f a b (6 Replies)
Discussion started by: cabled
6 Replies
SendEmail(1)							   User Commands						      SendEmail(1)

NAME
SendEmail - Lightweight, command line SMTP email client SYNOPSIS
SendEmail -f ADDRESS [options] OPTIONS
-f ADDRESS from (sender) email address * At least one recipient required via -t, -cc, or -bcc * Message body required via -m, STDIN, or -o message-file=FILE Common: -t ADDRESS [ADDR ...] to email address(es) -u SUBJECT message subject -m MESSAGE message body -s SERVER[:PORT] smtp mail relay, default is localhost:25 Optional: -a FILE [FILE ...] file attachment(s) -cc ADDRESS [ADDR ...] cc email address(es) -bcc ADDRESS [ADDR ...] bcc email address(es) [32;1mParanormal:[m -xu USERNAME authentication user (for SMTP authentication) -xp PASSWORD authentication password (for SMTP authentication) -l LOGFILE log to the specified file -v verbosity, use multiple times for greater effect -q be quiet (no stdout output) -o NAME=VALUE see extended help topic "misc" for details Help: --help TOPIC The following extended help topics are available: addressing explain addressing and related options message explain message body input and related options misc explain -xu, -xp, and others networking explain -s, etc output explain logging and other output options REPORTING BUGS
Report bugs to <http://bugs.debian.org/sendemail> AUTHOR
sendemail was written by Brandon Zehm <caspian@dotconf.net> . This manual page was written by Brandon Zehm and improved by Alejandro Garrido Mota <garridomota@gmail.com>, for the Debian project (and may be used by others). sendEmail September 2010 SendEmail(1)
All times are GMT -4. The time now is 01:38 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy