+# deb http://security.debian.org/ buster/updates main
+# deb-src http://security.debian.org/ buster/updates main
+
+# deb http://http.us.debian.org/debian buster-updates main
+# deb-src http://http.us.debian.org/debian buster-updates main
+# EOF
+# if ! diff -q $t $f; then
+# s cp $t $f
+# s chmod 644 $f
+# p update
+# fi
+
+ # newer version needed for false positive in checkrestart.
+ # I did buster at first, but other problem above with having
+ # buster repos. not sure if the false positive exists in etiona.