How can I remove a substring of a string in a shell script?

Question

I have a file with a list of words like:

FIRST_WORD abc
FIRST_WORD(1) bcd
FIRST_WORD(2) def
SECOND_WORD gh
THIRD_WORD jiu
THIRD_WORD(1) lom
...

and I want to remove the (i), when it is present, to obtain:

FIRST_WORD abc
FIRST_WORD bcd
FIRST_WORD def
SECOND_WORD gh
THIRD_WORD jiu
THIRD_WORD lom
...

Answer 1

You can get it:

test="123456"
echo ${test:3}

Output:

456