Attempt to debug clickhouse installation errors on TravisCI

Author: Enmk

.travis.yml

@@ -40,11 +40,13 @@ matrix:
 
 before_install: |
   if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
+    set -x
     sudo apt-get install apt-transport-https ca-certificates dirmngr
     sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv E0C56BD4
     echo "deb https://repo.clickhouse.tech/deb/stable/ main/" | sudo tee \
         /etc/apt/sources.list.d/clickhouse.list
-    sudo apt-get update -q && sudo apt-get install -q -y --allow-unauthenticated clickhouse-server
+    sudo apt-get update -q
+    sudo apt-get install -q -y --allow-unauthenticated clickhouse-server
     sudo service clickhouse-server start
   fi