Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Help with a bash loop script
Top Forums UNIX for Beginners Questions & Answers Help with a bash loop script Post 303037352 by bakunin on Tuesday 30th of July 2019 10:12:21 AM
Old 07-30-2019
Here we go again analysing FASTA-files. I wonder if we are going to be mentioned in the dozens of biological research papers we have helped to create over time.

Quote:
Originally Posted by dre
Create a single bash script that does the following:
Sorry, but this is not the way that works.

First: you come across like a teacher posing the homework for us. Actually we are all professionals here and have done our homework meticulously which is why we don't have to do more homework any more. In case it was homework given to you by your teacher: there is a special forum for this with special rules in place. Please re-create the thread there and provide the necessary information.

Second, in case this is not homework but actually your work: we do not insist on a lot of social conventions here (after all, we are sysadmins - being somewhat autistic is part of the requirement for this job), but still a well-placed "please" here and there, along with some of the common niceties called "good manners" oils the social machinery. If you ever wonder who writes the answers to your questions: it is not some clever machine and a fat server - it is actually living, breathing persons.

Third and foremost: we are here to help you help yourself. If you want a shell-script - WRITE IT! Attempts, however failing, will count. If you tried and it didn't work, post what you did and the error you got trying to run it. We will, regardless of how long it will take, explain to you what was wrong and how to do it better (actually quite like the way i explain to you right now why you need to change your problem statement) until you understand. We will also point out ways to better solve the problem, different tools, suggest sources to find valuable information and so on and so on. But we will NOT write your code for you. We are a help forum, not your unpaid programming staff.

I hope this helps.

bakunin
These 2 Users Gave Thanks to bakunin For This Post:
drl wisecracker
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

loop does not execute in bash script?

I have a very basic bash shell script, which has many "while... done; for .... done" loop clauses, like the following ~~ #!/bin/bash while blablalba; do .... done < /tmp/file for line in `cat blablabla`; do grep $line /tmp/raw ; done > /tmp/1; while blablalba2; do .... done <... (2 Replies)
Discussion started by: fedora
2 Replies

2. Shell Programming and Scripting

error in bash script 'if' loop

SEND_MESSAGE=test echo $SEND_MESSAGE if then echo `date` > update_dt_ccaps.lst echo "The file transfer failed" >> update_dt_ccaps.lst SEND_MESSAGE=false fi The above code is showing error in bash shell as : ./test: line 5: [: test: integer expression expected ... (2 Replies)
Discussion started by: DILEEP410
2 Replies

3. Shell Programming and Scripting

Whitespace in filenames in for loop in bash script

I'm trying to search all .odt files in a directory for a string in the text of the file. I've found a bash script that works, except that it can't handle whitespace in the filenames. #!/bin/bash if ; then echo "Usage: searchodt searchterm" exit 1 fi for file in $(ls *.odt); do ... (4 Replies)
Discussion started by: triplemaya
4 Replies

4. Shell Programming and Scripting

Getting error on for loop - bash script

Hi, I am working on bash script after a long time. I am getting error near done statement while running a for loop snippet. The error says "Syntax error near unexpcted token 'done'" please suggest what could be wrong. here is the snippet elements=${#option_arr} //an array of values... (1 Reply)
Discussion started by: arundhati_s
1 Replies

5. Shell Programming and Scripting

Expect script called in loop from Bash Script

Having issues with an expect script. I've been scripting bash, python, etc... for a couple years now, but just started to try and use Expect. Trying to create a script that takes in some arguments, and then for now, just runs a pwd command(for testing, final will be command I pass). Here is... (0 Replies)
Discussion started by: cbo0485
0 Replies

6. Shell Programming and Scripting

Bash script - loop question

Hi Folks, I have a loop that goes through an array and the output is funky. sample: array=( 19.239.211.30 ) for i in "${array}" do echo $i iperf -c $i -P 10 -x CSV -f b -t 50 | awk 'END{print '$i',$6}' >> $file done Output: 19.239.211.30 19.2390.2110.3 8746886 seems that when... (2 Replies)
Discussion started by: nitrohuffer2001
2 Replies

7. Shell Programming and Scripting

While loop with input in a bash script

I have the following while loop that I put in a script, demo.sh: while read rna; do aawork=$(echo "${rna}" | sed -n -e 's/\(...\)\1 /gp' | sed -f rna.sed) echo "$aawork" | sed 's/ //g' echo "$aawork" | tr ' ' '\012' | sort | sed '/^$/d' | uniq -c | sed 's/*\(*\) \(.*\)/\2: \... (3 Replies)
Discussion started by: faizlo
3 Replies

8. Shell Programming and Scripting

Loop through multiple files in bash script

Hi Everybody, I'm a newbie to shell scripting, and I'd appreciate some help. I have a bunch of .txt files that have some unwanted content. I want to remove lines 1-3 and 1028-1098. #!/bin/bash for '*.txt' in <path to folder> do sed '1,3 d' "$f"; sed '1028,1098 d' "$f"; done I... (2 Replies)
Discussion started by: BabyNuke
2 Replies

9. Shell Programming and Scripting

How to use grep in a loop using a bash script?

Dear all, Please help with the following. I have a file, let's call it data.txt, that has 3 columns and approx 700,000 lines, and looks like this: rs1234 A C rs1236 T G rs2345 G T Please use code tags as required by forum rules! I have a second file, called reference.txt,... (1 Reply)
Discussion started by: aberg
1 Replies

10. UNIX for Beginners Questions & Answers

Help with date in bash script for loop from YYYYMMDDHHMM

Hi everyone I need some help I want to create an script which does some processing it takes the two arguments 201901010000 and 201901020200 - so YYYMMDDHHMM I want to split processing into hours from start until end, I dont get why this works but when I add to a future variable... (1 Reply)
Discussion started by: kl1ngac1k
1 Replies

LEARN ABOUT DEBIAN

syslogout

SYSLOGOUT(8)						      System Manager's Manual						      SYSLOGOUT(8)

NAME

       syslogout - modular centralized shell logout mechanism

DESCRIPTION

       syslogout is a generic approach to enable centralized shell logout actions for all users of a given system in a modular and centralized way
       mostly aimed at avoiding work for lazy sysadmins.  It has only been tested to work with the bash shell.

       It basically consists of the small /etc/syslogout shell script which invokes other small shell scripts having a .bash suffix which are con-
       tained  in  the	/etc/syslogout.d/ directory.  The system administrator can drop in any script he wants without any naming convention other
       than that the scripts need to have a .bash suffix to enable automagic sourcing by the /etc/syslogout script.

       For shell sessions, the contents of /etc/syslogout.d/" will be sourced by every user at logout if the following lines are  present  in  his
       $HOME/.bash_logout:

	   if [ -f /etc/syslogout ]; then
	       . /etc/syslogout
	   fi

       If  used  for X sessions it is advisable to include the former statement into the Xreset script of the X display manager instead to prevent
       that closing of an terminal emulator window yields unexpected results in your running X session if your X11 terminal emulator  is  using  a
       login  shell.   Be  sure  then to run it under the user-id of the X session's user.  See the example files in /usr/share/doc/syslogout/ for
       illustration.

       Users not wanting /etc/syslogout to be sourced for their environment can easily disable it's automatic mechanism.  It can  be  disabled	by
       simply creating an empty file called $HOME/.nosyslogout in the user's home directory using e.g. the touch(1) command.

       Any single configuration file in /etc/syslogout.d/ can simply be overridden by any user by creating a private $HOME/.syslogout.d/ directory
       which may contain a user's own version of any configuration file to be sourced instead of the system default.   It's  names  have  just	to
       match  exactly  the  system's  default /etc/syslogout.d/ configuration files.  Empty versions of these files contained in the $HOME/.syslo-
       gout.d/ directory automatically disable sourcing of the system wide version.

       Naturally, users can add and include their own private scripts to be automagically executed by /etc/syslogout at logout time.

OPTIONS

       There are no options other than those dictated by shell conventions.  Anything is defined within the configuration scripts themselves.

SEE ALSO

       The  README  files  and	configuration  examples  contained  in	/usr/share/doc/syslogout/  and	the  manual  page  for	bash(1),  xdm(1x),
       xdm.options(5), and wdm(1x).  Recommended further reading is everything related with shell programming.

       If  you need a similar mechanism for executing code at login time check out the related package sysprofile(8) which is a very close compan-
       ion to syslogout.

BUGS

       syslogout in its current form is mainly restricted to bash(1) syntax.  In fact it is actually  a rather embarrassing quick and  dirty  hack
       than  anything  else  -	but  it  works.   It  serves the practical need to enable a centralized bash configuration  until something better
       becomes available.  Your constructive criticism in making  this	into something better" is very welcome.  Before i forget to mention it: we
       take patches... ;-)

AUTHOR

       syslogout  was developed by Paul Seelig <pseelig@debian.org> specifically for the Debian GNU/Linux system.  Feel free to port it to and use
       it anywhere else under the conditions of either the GNU public license or the BSD license or both.  Better yet, please help to make it into
       something more worthwhile than it currently is.

																      SYSLOGOUT(8)
All times are GMT -4. The time now is 01:14 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy