regex - Unix: Rename file with dynamic extension -

i using rhel 5.10 , trying remove dynamic date extension bunch of files.

the file format filename01.gz.20160704, last part date dynamic. want renamed filename01.gz

when try rename below, works

rename   gz.20160704   gz   filename01.gz.20160704 

output: filename01.gz

but when try rename doesn't work

rename  gz.*  gz  filename01.gz.20160704 

i tried searching other answer , in of them, used rename below, sadly not working me.

rename 's/gz*/gz/' filename01.gz.20160704    rename 's/gz.*/gz/' filename01.gz.20160704   

the man page linux says

for example, given files foo1, ..., foo9, foo10, ..., foo278, commands           rename foo foo0 foo?           rename foo foo0 foo?? 

could please me or there alternative approach can use?

---

update: added solution given @pskocik not working either.

$> ls -ltr filename01* -rw-rw----+ 1 foo foo 0 jul  4 08:34 filename01.gz.20160704 $> rename -n 's/\.gz\.[^.]*/.gz/' filename01.gz.* $> echo $? 0 $> ls -ltr filename01* -rw-rw----+ 1 foo foo 0 jul  4 08:34 filename01.gz.20160704 

1. with prename (perl-rename):

   rename -n 's/\.gz\.[^.]*/.gz/' filename01.gz.*    

2. with mv , posix shell:

   for f in *.gz.*; mv "$f" "${f%.*}"; done