Install

See release versions on the Git Wikipedia page.

Linux

Basic

$ sudo apt install git

Latest

Using Ubuntu and the default source of software might mean the latest version of Git you can install is a few years old.

In this case, only 2.25 was available and not 2.38.

$ sudo apt list git -a
Listing... Done
git/focal-updates,focal-security 1:2.25.1-1ubuntu3.6 amd64
git/focal 1:2.25.1-1ubuntu3 amd64

1. Uninstall

Uninstall your current Git, if necessary:

$ sudo apt remove git

2. Add source

Get the latest available, add to sources with this:

$ sudo apt install software-properties-common
$ sudo add-apt-repository ppa:git-core/ppa

The first step is to make add-apt-repository available on Debian but it should be included on Ubuntu already, from my experience using both.

PS. You do not need to add run sudo apt update.

Now list all versions you can now install with this command, including 2.38 now at the top in this exmaple:

$ sudo apt list git -a
Listing... Done
git/focal,now 1:2.38.1-0ppa1~ubuntu20.04.1 amd64 [installed]
git/focal-updates,focal-security 1:2.25.1-1ubuntu3.6 amd64
git/focal 1:2.25.1-1ubuntu3 amd64

3. Install

The one at the top of the list will be installed with a simple install.

$ sudo apt install git

Or if you want to pick a specific version, to this with the appropriate version:

$ sudo apt install git=1:2.38.1-0ppa1~ubuntu20.04.1