Samba vulnerability CVE-2017-7494 Series 2.x Series 3.x

[amigo]

Sorry guys, when I said step by step I meant it. I'll be 72 this year so lend a hand to the old guy.
I ran sudo apt-get update and got this

Hit:1 http://us.archive.ubuntu.com/ubuntu xenial InRelease
Get:2 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB]   
Hit:3 http://ppa.launchpad.net/nemh/systemback/ubuntu xenial InRelease       
Get:4 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]   
Hit:5 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu xenial InRelease
Hit:6 http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu xenial InRelease       
Get:7 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB] 
Get:8 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [544 kB]
Get:9 http://us.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages [528 kB]
Get:10 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [469 kB]
Get:11 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [454 kB]
Get:12 http://us.archive.ubuntu.com/ubuntu xenial-backports/universe Sources [4,036 B]
Get:13 http://us.archive.ubuntu.com/ubuntu xenial-backports/universe amd64 Packages [5,616 B]
Get:14 http://us.archive.ubuntu.com/ubuntu xenial-backports/universe i386 Packages [5,620 B]
Get:15 http://us.archive.ubuntu.com/ubuntu xenial-backports/universe Translation-en [2,872 B]
Hit:16 http://repo.linuxliteos.com/linuxlite citrine InRelease               
Hit:17 http://archive.canonical.com xenial InRelease                         
Fetched 2,320 kB in 5s (424 kB/s)                                             
Reading package lists... Done

Amigo (Morris)