Elgg 1.11.2 fresh install error on linux

I am getting this error

[25-May-2015 13:46:03 America/Chicago] Exception #1432579563: exception 'DatabaseException' with message 'Elgg couldn't connect to the database using the given credentials. Check the settings file.' in /home/myusername/public_html/elgg/engine/classes/Elgg/Database.php:147

Stack trace:

#0 /home/myusername/public_html/elgg/engine/classes/Elgg/Database.php(123): Elgg\Database->establishLink('readwrite')

#1 /home/myusername/public_html/elgg/engine/lib/elgglib.php(1838): Elgg\Database->setupConnections()

#2 [internal function]: _elgg_engine_boot('boot', 'system', NULL)

#3 /home/myusername/public_html/elgg/engine/classes/Elgg/EventsService.php(56): call_user_func_array('_elgg_engine_bo...', Array)

#4 /home/myusername/public_html/elgg/engine/lib/elgglib.php(571): Elgg\EventsService->trigger('boot', 'system', NULL)

#5 /home/myusername/public_html/elgg/engine/start.php(68): elgg_trigger_event('boot', 'system')

#6 /home/myusername/public_html/elgg/index.php(55): require_once('/home/myusername/...')

#7 {main}

[25-May-2015 13:46:03 America/Chicago] PHP WARNING: 2015-05-25 13:46:03 (CDT): "mysql_real_escape_string(): Access denied for user 'myusername'@'localhost' (using password: NO)" in file /home/myusername/public_html/elgg/engine/classes/Elgg/Database.php (line 651)

[25-May-2015 13:46:03 America/Chicago] PHP WARNING: 2015-05-25 13:46:03 (CDT): "mysql_real_escape_string(): A link to the server could not be established" in file /home/myusername/public_html/elgg/engine/classes/Elgg/Database.php (line 651)

[25-May-2015 13:46:03 America/Chicago] Exception #1432579563 : fatal error in exception handler : Connection to database was lost.