diff --git a/usr/bin/dist-installer-cli b/usr/bin/dist-installer-cli
index bd7ec76..ecf3f07 100755
--- a/usr/bin/dist-installer-cli
+++ b/usr/bin/dist-installer-cli
@@ -900,9 +900,14 @@ update_sources(){
   log notice "Updating package list."
 
   ## Debugging.
+  tty || true
   ls -la /dev/tty
   test -w /dev/tty
 
+  #root_cmd ${pkg_mngr_update} 2>&1 || true
+  #update_sources_error
+  ## result: OK: command_without_extrarenous_spaces="sudo -- apt-get update --yes --error-on=any"
+
   # shellcheck disable=SC2086
   if update_output=$(root_cmd ${pkg_mngr_update} 2>&1 | tee /dev/tty) ; then
     true "INFO: Exit code is zero but that does not guarantee in case of dnf that there is no error."