-<pre><tt># echo "deb http://debian.sur5r.net/i3/ $(lsb_release -c -s) universe" >> /etc/apt/sources.list\r
-# apt-get update\r
-# apt-get --allow-unauthenticated install sur5r-keyring\r
-# apt-get update\r
-# apt-get install i3</tt></pre>\r
+<pre><tt>$ /usr/lib/apt/apt-helper download-file http://debian.sur5r.net/i3/pool/main/s/sur5r-keyring/sur5r-keyring_2018.01.30_all.deb keyring.deb SHA256:baa43dbbd7232ea2b5444cae238d53bebb9d34601cc000e82f11111b1889078a\r
+# dpkg -i ./keyring.deb\r
+# echo "deb http://debian.sur5r.net/i3/ $(grep '^DISTRIB_CODENAME=' /etc/lsb-release | cut -f2 -d=) universe" >> /etc/apt/sources.list.d/sur5r-i3.list\r
+# apt update\r
+# apt install i3</tt></pre>\r