I install kibana on Ubuntu Server 14.04.4 LTS.
But when I upgrade kibana from 4.5.0 to 4.5.1, it cannot startup any more.
Here is the /var/log/kibana/kibana.stderr:
FATAL { [Error: EACCES: permission denied, open '/opt/kibana/optimize/bundles/kibana.entry.js']
  cause: 
   { [Error: EACCES: permission denied, open '/opt/kibana/optimize/bundles/kibana.entry.js']
     errno: -13,
     code: 'EACCES',
     syscall: 'open',
     path: '/opt/kibana/optimize/bundles/kibana.entry.js' },
  isOperational: true,
  errno: -13,
  code: 'EACCES',
  syscall: 'open',
  path: '/opt/kibana/optimize/bundles/kibana.entry.js' }
FATAL { [Error: EACCES: permission denied, open '/opt/kibana/optimize/bundles/kibana.entry.js']
  cause: 
   { [Error: EACCES: permission denied, open '/opt/kibana/optimize/bundles/kibana.entry.js']
     errno: -13,
     code: 'EACCES',
     syscall: 'open',
     path: '/opt/kibana/optimize/bundles/kibana.entry.js' },
  isOperational: true,
  errno: -13,
  code: 'EACCES',
  syscall: 'open',
  path: '/opt/kibana/optimize/bundles/kibana.entry.js' }
I've tried to use apt-get purge kibana to uninstall kibana, and use apt-get install kibana to install it agent.