Git and Ubuntu - not branching out

 Whilst trying to make some changes to a GitHub project, using an Ubuntu box, I hit an interesting issue with git switch - namely that it doesn't work 

So I'm running Ubuntu 18.04.6 LTS: -

lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.6 LTS
Release: 18.04
Codename: bionic

and had created a new branch: -

git branch

  test_doc_update
* develop

and then tried to switch to it: -

git switch test_doc_update

but instead got: -

git: 'switch' is not a git command. See 'git --help'.

I checked the version of Git: -

git --version

git version 2.17.1

and even tried upgrading it: -

apt-get update && apt-get upgrade -y git

...

The following packages will be upgraded:
  git git-man
2 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.

...

but to no avail: -

git --version

git version 2.17.1

Instead, as per this Git: ‘switch’ is not a git command. See ‘git –help’  I used this instead: -

git checkout test_doc_update

Switched to branch 'test_doc_update'

git branch

* test_doc_update
  develop

Sorted !

For the record, I have a more up-to-date version of git on the Mac, via Homebrew

ls -al `which git`

lrwxr-xr-x  1 hayd  admin  28 19 Apr 08:59 /usr/local/bin/git -> ../Cellar/git/2.36.0/bin/git

git --version

git version 2.36.0

with which git switch DOES work