i install hue on ubuntu.when i go to the step of setting database.it report Unable to verify database connection     i check the cloudera-scm-aserver.log     it tell me "Command '/run/cloudera-scm-agent/process/163-HUE-test-db-connection/altscript.sh sec-2-password' returned non-zero exit status 126."   so i check the permission of altscript.sh       it's executable.   how can i fix it? thank you. ... View more