sudo efibootmgr
BootCurrent: 0005
Timeout: 0 seconds
BootOrder: 0004,3004,0005,2001,2002,2003
Boot0000* Network Adapter (IPv4 Legacy)
Boot0001* Notebook Hard Drive - HGST HTS545050A7E680
Boot0004* Windows Boot Manager
Boot0005* ubuntu
Boot2001* USB Drive (UEFI)
Boot2002* Internal CD/DVD ROM Drive (UEFI)
Boot3001* Internal Hard Disk or Solid State Disk
Boot3004* Internal Hard Disk or Solid State Disk
BootCurrent: 0005
Timeout: 0 seconds
BootOrder: 0004,3004,0005,2001,2002,2003
Boot0000* Network Adapter (IPv4 Legacy)
Boot0001* Notebook Hard Drive - HGST HTS545050A7E680
Boot0004* Windows Boot Manager
Boot0005* ubuntu
Boot2001* USB Drive (UEFI)
Boot2002* Internal CD/DVD ROM Drive (UEFI)
Boot3001* Internal Hard Disk or Solid State Disk
Boot3004* Internal Hard Disk or Solid State Disk