Removing part of the file names

Question

I have a bunch of files like this:

file123.txt.452
file456.txt.098
file789.txt.078

How can I remove the second dot and the numbers at the end from the file names?

I tried using rename but I don’t think my regex is correct:

rename 's/txt.*/txt/' *

Answer 1

Something like:

for f in *.txt.*; do
    g=${f%.txt.*}.txt
    mv $f $g
done