Debian/Ubuntu
For the latest stable version for your release of Debian/Ubuntu
$ apt-get install git
For Ubuntu, this PPA provides the latest stable upstream Git version
$ add-apt-repository ppa:git-core/ppa
$ apt update; apt install git
Fedora
(up to Fedora 21)
$ yum install git
(Fedora 22 and later)
$ dnf install git
Gentoo
$ emerge --ask --verbose dev-vcs/git
Arch Linux
$ pacman -S git
openSUSE
$ zypper install git
Mageia
$ urpmi git
Nix/NixOS
$ nix-env -i git
FreeBSD
$ pkg install git
Solaris 9/10/11 (OpenCSW)
$ pkgutil -i git
Solaris 11 Express
$ pkg install developer/versioning/git
OpenBSD
$ pkg_add git
Alpine
$ apk add git
Slitaz
$ tazpkg get-install git