[Solved] How to rename a file on Mac OS

Hello,
brew install rename does not work in terminal due to Mac version incompatibility issue.
I have hundreds of filenames starting with output_*.html and I need to trim output_ section
I have found some tutorials but do not exactly match to my case.
ls * | mv output_\\ does not work.
Could you please let me know if there is an easy way to accomplish this process?

Extra effort:
When I go in deeper, some says " homebrew should also be installed".
Below code does not install homebrew

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

It asks me to run:

/usr/local/bin/brew update --force --quiet

Which returns to:
Failed during: /usr/local/bin/brew update --force --quiet
And asks me to run below commands:

  git -C /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core fetch --unshallow
  git -C /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask fetch --unshallow

I suppose it will take a bit longer to be completed. I will let you know when it is done.

Result:
At the end, I run again brew install rename
It updated homebrew and installation of the command rename has been completed..
Thank you
Boris

Seems to work fine on my mac:

$ sw_vers
ProductName: Mac OS X
ProductVersion: 10.15.7
BuildVersion: 19H1217

$ brew install rename

OK

$ rename
Usage:
    rename [switches|transforms] [files]

    Switches:

    --man (read the full manual)
    -0/--null (when reading from STDIN)
    -f/--force or -i/--interactive (proceed or prompt when overwriting)
    -g/--glob (expand "*" etc. in filenames, useful in Windows™ CMD.EXE)
    -k/--backwards/--reverse-order
    -l/--symlink or -L/--hardlink
    -M/--use=*Module*
    -n/--just-print/--dry-run
    -N/--counter-format
    -p/--mkpath/--make-dirs
    --stdin/--no-stdin
    -t/--sort-time
    -T/--transcode=*encoding*
    -v/--verbose

    Transforms, applied sequentially:

    -a/--append=*str*
    -A/--prepend=*str*
    -c/--lower-case
    -C/--upper-case
    -d/--delete=*str*
    -D/--delete-all=*str*
    -e/--expr=*code*
    -P/--pipe=*cmd*
    -s/--subst *from* *to*
    -S/--subst-all *from* *to*
    -x/--remove-extension
    -X/--keep-extension
    -z/--sanitize
    --camelcase --urlesc --nows --rews --noctrl --nometa --trim (see manual)

Thank you Neo,
homebrew installation was incomplete.

Kind regards
Boris

FYI, that kind of renaming is easy to do with a loop:

for i in output_*.html
do
    mv "$i" "${i%output_}"
done

For more complicated stuff, a program like rename is a good choice.

The % trims from the end.
I think you mean # i.e. from the beginning.

for i in output_*.html
do
    mv "$i" "${i#output_}"
done

Thank you @MadeInGermany,
Works as expected with mv command.

root@WDMyCloud # ls
output_1.html  out_2.html  s.sh
root@WDMyCloud # ./s.sh
root@WDMyCloud # ls
1.html  2.html  s.sh

Kind regards
Boris