Add info about availability in Ubuntu 18.10+

Installation-on-Debian-and-Ubuntu.md

@@ -9,7 +9,7 @@ The generic [instructions for Linux](Installation-linux) work fine on Debian and
 However, if you had an old `dnscrypt-proxy` 1.x version installed, remove it first with:
 
 ```sh
-apt-get purge dnscrypt-proxy
+sudo apt purge dnscrypt-proxy
 ```
 
 ### Debian Testing _(`buster`)_, Debian Unstable _(`sid`)_
@@ -75,7 +75,14 @@ And complete the setup with a reboot.
 
 ---
 
-### Ubuntu PPA installation
+### Ubuntu 18.10+
+
+DNSCrypt-Proxy 2.x is included in Ubuntu 18.10+ repositories, install it with `sudo apt install dnscrypt-proxy`
+
+
+#### Ubuntu PPA
+
+For older Ubuntu versions, or if you need newer DNSCrypt-Proxy version than included in Ubuntu repositories, you can use PPA:
 
 ```sh
 sudo add-apt-repository ppa:shevchuk/dnscrypt-proxy && \
@@ -114,7 +121,7 @@ If you want to continue to use dnsmasq (default on Ubuntu), some configuration i
 - configure dnsmasq to use dnscrypt-proxy if file not already configured:
 
 ```sh
-$ sudo tee /etc/dnsmasq.d/dnscrypt-proxy << EOF
+sudo tee /etc/dnsmasq.d/dnscrypt-proxy << EOF
 # Redirect everything to dnscrypt-proxy
 server=127.0.2.1
 no-resolv