Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How To Write my Bash Script To Automate it?
Top Forums UNIX for Beginners Questions & Answers How To Write my Bash Script To Automate it? Post 303030816 by Don Cragun on Saturday 16th of February 2019 10:36:51 AM
Old 02-16-2019
Hi RudiC,
The standard split utility creates output filenames with sequence "numbers" added to the end of a given output filename prefix where the "numbers" aren't numeric; they are names like fasta.aa, fasta.ab, fasta.ac, ...

Like you said, awk would work well for this.

Hi laura,
To get the requested output, one could use something like:
Code:
#!/bin/bash
awk 'NR % 2 {	f = ++cnt".fasta" }
{		print > f }
!(NR % 2){	close(f)}
' out1 && rm out1

but that would produce names with varying output lengths that would be inconvenient to process if you wanted to handle them in the same order that they originally appeared in the file named out1. If you do later want to process them in that order, you would probably be happier with something more like:
Code:
#!/bin/bash
awk 'NR % 2 {	f = sprintf("%05d.fasta", ++cnt) }
{		print > f }
!(NR % 2){	close(f)}
' out1 && rm out1

which would produce all 34900 output files with names that start with 5 decimal digits (with leading zeros on the first 9999 files so normal listings of the produced files are in the order you probably want.

If you intend to try this on a Solaris/SunOS operating system, change awk in both of the above suggestions to /usr/xpg4/bin/awk or nawk.

As RudiC said, next time you need help, plan to tell us what operating system as well as what shell you're using and show us what you have tried to solve the problem on your own. We want to help you learn how to do stuff like this on your own; not to act as your unpaid programming staff.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Can anybody write this bash script ?

hi, first congratulations on the nice forum! Can anybody write script, which can make copy of some or all files of the current directory in new directory (called "backups", which must be made in the current directory, if it's not already exist). And bring out a massage (report) with the count... (7 Replies)
Discussion started by: Cecko
7 Replies

2. Shell Programming and Scripting

Bash Script to Read & Write on different directories

Hi, root@server] df -h 121G 14G 101G 12% /home 147G 126G 14G 91% /backup We having our site files and images are storing in /backup/home/user/files/ through symbolic link created in /home directory pointing in /backup directory as following. root@server] cd /home... (1 Reply)
Discussion started by: mirfan
1 Replies

3. Homework & Coursework Questions

How to write script in bash.

I am very new to Linux/Unix. Kindly assist the following: I wish to write a bash shell script called how_many_to_go that calculates and prints the number of days, hours, minutes and/or seconds until the end of the current month (based on the output of the date command). Do ... (2 Replies)
Discussion started by: alobi
2 Replies

4. Shell Programming and Scripting

Help to write bash script code

I am newbie to UNIX. I came across this exercise in one the books.Can anyone help me with this question?????? Write a short Bash script that, given the name of a file as an argument, reads the file name and creates a new file containing only lines which consist of one word. Here is an example... (4 Replies)
Discussion started by: krthknaidu
4 Replies

5. Shell Programming and Scripting

Bash script to Automate the Virtual Host creation process!!

Hi all, This is my sample code in /etc/httpd/conf.d/applications.conf file currently we are creating subdomain mannually for every new subdomain. I want to automate this process througs bash script , how its possible. <VirtualHost *:80> ServerName google.com ServerAlias google.com... (5 Replies)
Discussion started by: anishkumarv
5 Replies

6. Shell Programming and Scripting

How to write bash shell script for mentioned requirement?

Hi All, I am unable to write the script for the below requirement. Requirement: Main table dir_ancillary table contain three column "dir_ancillary.table_name"," dir_ancillary.text_file_name ", "dir_ancillary.Include" . This dir_ancillary contain undefined tables in the column... (2 Replies)
Discussion started by: Vineeta Nigam
2 Replies

7. Shell Programming and Scripting

How to write bash script for lvm snapshot?

Hi Team I am trying to put together a nice small script to mount my lvm snapshot Here are my objectives 1 Check whether snapshot is currently mounted. If so echo umount snapshot and exit from the script. 2 If it's not mounting, check whether the mount point exist, If so, create lvm... (0 Replies)
Discussion started by: fugeulu
0 Replies

8. Shell Programming and Scripting

Automate OTPW login to ssh via bash script

Hello everyone. I'm a Linux novice trying out a lot of bash scripting lately, as it is so very addictive. Lately I have been setting up one of my boxes remotely and have been hardening it as much as possible. Please allow me to explain the scenario, as it does tend to become a little... (1 Reply)
Discussion started by: instro
1 Replies

9. UNIX for Beginners Questions & Answers

Automate "touch" bash script not working.

#!/bin/bash -i SAVEIFS=$IFS IFS=$"\n\b" picc=$* if ; then echo $TDATE if ; then touch dummy touch -t "tdate" dummy touch -r "dummy" "$picc" else echo -e "No mod date value to apply. If there is one in your shell,\ninvoke \eStarted asking advice on this (on Linuxquestions.org).... (9 Replies)
Discussion started by: iamwrong
9 Replies

10. UNIX for Beginners Questions & Answers

How to write a value to a physical memory address in bash script?

How would I write a value to a physical memory address? I was able to read a physical memory address (for example, 0x400) using this line: dd if=/dev/mem count=4 bs=1 skip=$(( 0x400 )) But I get an error: dd: 'standard input': cannot skip to specified offset when I try to write using... (1 Reply)
Discussion started by: rabrandt
1 Replies

LEARN ABOUT CENTOS

bashbug

BASHBUG(1)						      General Commands Manual							BASHBUG(1)

NAME

       bashbug - report a bug in bash

SYNOPSIS

       bashbug [--version] [--help] [email-address]

DESCRIPTION

       bashbug	is  a shell script to help the user compose and mail bug reports concerning bash in a standard format.	bashbug invokes the editor
       specified by the environment variable EDITOR on a temporary copy of the bug report format outline. The user must fill  in  the  appropriate
       fields  and  exit  the  editor.	 bashbug  then	mails the completed report to bug-bash@gnu.org, or email-address.  If the report cannot be
       mailed, it is saved in the file dead.bashbug in the invoking user's home directory.

       The bug report format outline consists of several sections.  The first section provides information about the  machine,	operating  system,
       the  bash  version, and the compilation environment.  The second section should be filled in with a description of the bug.  The third sec-
       tion should be a description of how to reproduce the bug.  The optional fourth section is for a proposed fix.  Fixes are encouraged.

ENVIRONMENT

       bashbug will utilize the following environment variables if they exist:

       EDITOR Specifies the preferred editor. If EDITOR is not set, bashbug defaults to emacs.

       HOME   Directory in which the failed bug report is saved if the mail fails.

       TMPDIR Directory in which to create temporary files and directories.

SEE ALSO

       bash(1)

AUTHORS

       Brian Fox, Free Software Foundation
       bfox@gnu.org

       Chet Ramey, Case Western Reserve University
       chet@po.cwru.edu

GNU Bash-4.0							   1998 July 30 							BASHBUG(1)
All times are GMT -4. The time now is 09:40 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy