Simple find and replace with sed

Question

I\'m trying to replace a number that is in a couple different strings in a text file. Basically it would take the form of

tableNameNUMBER
carNUMBER
         


        

Answer 1

This should work just fine:

sed "s/NUMBER/$1/g" myScript.txt > test.txt

The g on the end allows set to replace NUMBER if it appears multiple times on one line.

In fact, a quick test:

foo.txt

carNUMBER
tableNameNUMBER
NUMBER
NUMBERfoo

$ NUMBER=3.14
$ sed "s/NUMBER/$NUMBER/g" foo.txt
car3.14
tableNumber3.14
3.14
3.14foo

Isn't that what your sed command is doing?

If you want to make sure you don't change NUMBER unless it's by itself, use \b around NUMBER:

$ sed "s/\bNUMBER\b/$NUMBER/g" foo.txt
carNumber
tabelNumberNUMBER
3.14
NUMBERfoo

If you don't care about the case of the string NUMBER, put an i on the end of the sed command:

$ sed "s/NUMBER/$NUMBER/gi" foo.txt