Shell Programming and Scripting

Code:

 Title : Price : Author : No of books sold
                                        France :  40    : John : 30
                                        Persia :  50    : John  : 40

Hey guys i am trying to write a code which can help me to find the correct line and then edit the information inside. For the input, the user can only input in the Title, Author and also NewTitle. For example, i will input in France for $title and then John for $author. it will then prompt me to enter new Price which i will enter $60. Basically, it has to search for the correct line using the title and author and then edit the information of price inside that line. I tried using sed.

Code:

sed '/keyword1/{/keyword2/s/old/new/}' filename > newfilename

but this only allows me to search for one keyword. So , i am not able to do the search using both $title and $author. Could you help me on how can i improve this sed command to search for the right row and then edit the right field variable? if i use awk , i am able to use the -F command which will allow me to skip ":" and then the edit the information in the correct variable in $4. but can this be done on sed also?

Hi.

My suggestion to you, really, is to try to learn some stuff by yourself before asking your question here.

This is not something I would usually suggest, but from this question and from your previous posts, you are failing to heed the simplest of advice by not implementing anything you have learnt from previous posts, into your new thinking.