Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Shell script help not sure of next command
Homework and Emergencies Homework & Coursework Questions Shell script help not sure of next command Post 303008559 by Don Cragun on Sunday 3rd of December 2017 01:53:24 AM
Old 12-03-2017
Assuming that the last field in your data is a number of units of that recipe item, are you looking for the highest unit price (e.g. $2.98 for pumpkin pie filling), or are you looking at the highest price based on the unit price and quantity (e.g., $4.45 for 5 potatoes)?

If the latter, it is unfortunate that grep doesn't do arithmetic and that bash doesn't perform floating point calculations. Are you supposed to be learning how to use awk?

Most versions of the sort utility since about 1990 have two ways of specifying which ranges of characters on an input line are to be used as a sort key. Many people (apparently including you) found the old way (+key_start_spec -key_end_spec) confusing. Please look at your system's man page for sort (i.e. issue the command man sort) and look for the -k keydef option description and see if you can more easily specify the unit price field to be used as the sort key. You might also want to look for an option (or keydef flag to reverse the sort order if you want the highest values first instead of last. Note that if you want to sort on two fields, you need to sort keys. For example, if you want to sort with unit prices as the primary key and quantity as the secondary key, you need to use the 3rd field as your primary key and the 4th field as your secondary key. Using the 3rd and 4th fields together as a single sort key won't give you the results you want when sorting numeric fields.

While you're looking at man pages, you might also want to investigate what the head and tail utilities do.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Need to Write Shell Script based off of this shell command

I'm trying to read a bunch of log files and output the lines that contain particular strings. To accomplish this, I've been running the following from the command line: find . -name "*" | xargs grep " " | grep " " > output.txt Two grep statements are needed in case I'm looking for a... (3 Replies)
Discussion started by: Rally_Point
3 Replies

2. Shell Programming and Scripting

can anyone help with shell script command about searching word with grep command?

i want to search in the current directory all the files that contain one word for example "hello" i want to achieve it with the grep command but not with the grep * (2 Replies)
Discussion started by: aintour
2 Replies

3. Shell Programming and Scripting

help with shell script: cp command not working, but mv command works...

Hello. I would like to ask your help regarding the cp command. We are using a cp command to create a back-up copy of our file but to no avail. It's just not working. We already checked the file and directory permissions and all seems correct. We have a script (ftp.script) which calls on... (1 Reply)
Discussion started by: udelalv
1 Replies

4. Shell Programming and Scripting

Shell script running command in different shell

Hi All, Is there any way where we can run few commands with different shell in a shell script ? Let's have an example below, My first line in script reads below, #!/bin/sh However due to some limitation of "/bin/sh" shell I wanted to use "/bin/bash" while executing few... (9 Replies)
Discussion started by: gr8_usk
9 Replies

5. Shell Programming and Scripting

When i am trying to execute export command within a shell script it is saying command not found.

I am running the export command within a view to use that value inside my build script. But while executing it it is saying "export command not found" My code is as follows: -------------------------- #!/bin/sh user="test" DIR="/bldtmp/"$user VIEW="test.view1" echo "TMPDIR before export... (4 Replies)
Discussion started by: dchoudhury
4 Replies

6. Shell Programming and Scripting

In Shell Script Does Second Command Wait For First Command To Complete

Hi All, I have a question related to Shell scripting. In my shell script, I have following two commands in sequence: sed 's/^/grep "^120" /g' $ORIGCHARGEDAMTLIST|sed "s;$;| cut -f$FIELD_NO1 -d '|' | awk '{ sum+=\$1} END {printf (\"%0.2f\\\n\", sum/100)}' >$TEMPFILE mv $TEMPFILE $ORIGFILE... (3 Replies)
Discussion started by: angshuman
3 Replies

7. Post Here to Contact Site Administrators and Moderators

Unable to pass shell script parameter value to awk command in side the same script

Variable I have in my shell script diff=$1$2.diff id=$2 new=new_$diff echo "My id is $1" echo "I want to sync for user account $id" ##awk command I am using is as below cat $diff | awk -F'~' ''$2 == "$id"' {print $0}' > $new I could see value of $id is not passing to the awk... (0 Replies)
Discussion started by: Ashunayak
0 Replies

8. Shell Programming and Scripting

Unable to pass shell script variable to awk command in same shell script

I have a shell script (.sh) and I want to pass a parameter value to the awk command but I am getting exception, please assist. diff=$1$2.diff id=$2 new=new_$diff echo "My id is $1" echo "I want to sync for user account $id" ##awk command I am using is as below cat $diff | awk... (2 Replies)
Discussion started by: Ashunayak
2 Replies

9. UNIX for Dummies Questions & Answers

Passing shell script parameter value to awk command in side the script

I have a shell script (.sh) and I want to pass a parameter value to the awk command but I am getting exception, please assist. diff=$1$2.diff id=$2 new=new_$diff echo "My id is $1" echo "I want to sync for user account $id" ##awk command I am using is as below cat $diff |... (1 Reply)
Discussion started by: Sarita Behera
1 Replies

10. UNIX for Dummies Questions & Answers

Shell script not working but command works in command prompt

Hi everyone I have a problem with my script If I try directly this command /usr/bin/nice -n 19 mysqldump -u root --password="******" wiki_schneider -c | nice -n 19 gzip -9 > /point_de_montage/$(date '+%Y%m%d')-wiki-db.sql.gz It works But if I simply add this command in a script and... (8 Replies)
Discussion started by: picemma
8 Replies

LEARN ABOUT SUSE

finance::quote::trustnet

Finance::Quote::Trustnet(3)				User Contributed Perl Documentation			       Finance::Quote::Trustnet(3)

NAME

       Finance::Quote::Trustnet - Obtain unit trust prices from trustnet.co.uk

SYNOPSIS

	   use Finance::Quote;

	   $q = Finance::Quote->new;

	   %stockinfo = $q->fetch("uk_unit_trusts","trust-name"); # Can failover to other methods
	   %stockinfo = $q->fetch("trustnet","trust-name"); # Use this module only.

DESCRIPTION

       This module obtains information about UK unit trust prices from www.trustnet.co.uk.  The information source "uk_unit_trusts" can be used if
       the source of prices is irrelevant, and "trustnet" if you specifically want to use trustnet.co.uk.

UNIT TRUST NAMES

       Unfortunately there is no unique identifier for unit trust names.  Therefore enough of the name should be given including spaces to yield a
       unique match.  Trustnet sometimes uses abbreviated names, and the string given should match the abbreviation.

       Consult http://www.trustnet.co.uk/ut/funds/perf.asp?sort=0 to find a match for your unit trusts.

       Example "jupiter income"

LABELS RETURNED

       Information available from Trustnet may include the following labels: exchange method source name currency bid ask yield price.	In case of
       a unit trust, "price" returns the offer (ask) price.  In case of an OIEC, the unique price is returned in "bid", "ask" and "price".

SEE ALSO

       Trustnet website - http://www.trustnet.co.uk/

       Finance::Quote::Yahoo::USA

perl v5.12.1							    2009-10-05					       Finance::Quote::Trustnet(3)
All times are GMT -4. The time now is 02:50 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy