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I'm kinda new in this and just installed ubuntu 16.04. Before this on the HDD was Windows 10. I put flash drive with Ubuntu and just erased/format whole drive and installed ubuntu.

Now when I switch on this laptop is asking me to choose to start ubuntu or make some memory test.. OS doesn't start right away until I choose something. Is it possible to hide this menu option at boot?

Secondly when I run fdisk -l I see something strange that I don't know what exactly mean..

Disk /dev/sda: 465,8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xbde941be

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sda1  *         2048 960641023 960638976 458,1G 83 Linux
/dev/sda2       960643070 976771071  16128002   7,7G  5 Extended
/dev/sda5       960643072 976771071  16128000   7,7G 82 Linux swap / Solaris

Partition 2 does not start on physical sector boundary.

Disk /dev/sdb: 14,9 GiB, 16013942784 bytes, 31277232 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk  identifier: 0x65709045

Device     Boot Start      End  Sectors  Size Id Type
/dev/sdb1        2048 31275007 31272960 14,9G  6 FAT16


Disk /dev/mapper/cryptswap1: 7,7 GiB, 8257011712 bytes, 16126976 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
  1. I don't recognize this:

    Device     Boot Start      End  Sectors  Size Id Type
    /dev/sdb1        2048 31275007 31272960 14,9G  6 FAT16
    

    I don't know why is there since I formatted whole HDD

  2. What is this error means?

      Partition 2 does not start on physical sector boundary.
    
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  • sdb is another device, probably a flash drive.
    – Pilot6
    Jun 27, 2016 at 12:01
  • No, I don't have anything like this. Just one mouse plugged in...
    – S.I.
    Jun 27, 2016 at 12:04
  • Maybe an SD card, etc. It is not a problem.
    – Pilot6
    Jun 27, 2016 at 12:06
  • When I start GParted I see only /dev/sda1, /dev/sda2 and /dev/sda5 which is like sub on /dev/sda2
    – S.I.
    Jun 27, 2016 at 12:06
  • No, it's brain new laptop and nothing plugged in. GParted doesn't show sdb at all
    – S.I.
    Jun 27, 2016 at 12:07

1 Answer 1

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"Is it possible to hide this menu option at boot?" Yes, it is. Check this: How to make grub stop appearing every time I boot?.

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