Shell Programming and Scripting

Hi Guys, i currently facing a problem with a script i'm writing.
I have a text file with the following data

Windows in 21 days:John Goodman:29.90:30:19

I will like to know what method i can use so in order to edit the data in any of the field with ":" being the delimiter.

example if i want to change the 4th field from 30 to 40, my data file will change to

Windows in 21 days:John Goodman:29.90:40:19

Thank you.

Try:

Code:

awk -F: '{$4=40}1' OFS=: file

Or

Code:

IFS=":"
read a b c d e f

-or-

Code:

sed 's/:../:40/3' infile

hi i tried this and its work great but one problem is that i written such a function

Code:

echo -n "New Title:"
   read title
   awk -F: '{$1='"$title"'}1' OFS=: $Filename1 > $Filename2

It can only take in numbers and not a word or sentence
example if i key "Harry Potter", it can't capture the sentence and direct it to Filename2. However if i key numbers such as "40", everything works out fine.
Can i know how can i mod the code to take in strings also? Thank

Try:

Code:

awk -F: '{$1='"\"$title\""'}1' OFS=: $Filename1 > $Filename2