Distribution-specific Package Installation
From SambaWiki
HOWTO install binary packages of Samba
This HOWTO lists the steps necessary to install binary packages on selected distributions and mentions known pitfalls.
CentOS 6.7
# yum install samba4
Note: Packages are of Samba version 4.0.0
Debian
Wheezy (stable)
Packages in Wheezy are very outdated, don't use them!
Jessie (testing)
apt-get install samba
FreeBSD
# pkg install net/samba41
Ubuntu
12.04 Precise Pangolin
Packages in 12.04 are very outdated, don't use them!
13.10 Saucy Salamander
# apt-get install samba4
Note: Packages are of Samba version 4.0.3