+deb http://mirrors.linode.com/debian/ stretch main
+deb-src http://mirrors.linode.com/debian/ stretch main
+
+deb http://security.debian.org/ stretch/updates main
+deb-src http://security.debian.org/ stretch/updates main
+
+# stretch-updates, previously known as 'volatile'
+deb http://mirrors.linode.com/debian/ stretch-updates main
+deb-src http://mirrors.linode.com/debian/ stretch-updates main
+
+deb http://mirrors.linode.com/debian/ stretch-backports main
+deb-src http://mirrors.linode.com/debian/ stretch-backports main
+
+deb http://mirrors.linode.com/debian stretch main
+deb-src http://mirrors.linode.com/debian stretch main
+
+deb http://security.debian.org/ stretch/updates main
+deb-src http://security.debian.org/ stretch/updates main
+
+deb http://mirrors.linode.com/debian stretch-updates main
+deb-src http://mirrors.linode.com/debian stretch-updates main
+
+deb http://mirrors.linode.com/debian unstable main
+deb-src http://mirrors.linode.com/debian unstable main