[System] How do I convert Kubuntu to the 2nd operating system?

[comonda2]

hello i am new in this forum and i need ur helps.i I installed kubuntu after win10.my first choice is win10 but kubuntu starts as first os.in bios, the selected ssd contains win10.and the selected boot setting is win 10 efi.but despite all of these, kubuntu opens automatically.how can i change this situation? also i noticed that kubuntu seems on samsung ssd which contain only win10 on bios.kubuntu is on sandisk ssd.i dont understood why? thank you for ur helps.

[jpenguin]

Not quite following... do you see grub at all? Is each os on it's own disk? Is windows in grub & you just want to make it default, if so- the second answer at https://askubuntu.com/questions/1002...rub-boot-order

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[comonda2]

Not quite following... do you see grub at all? Is each os on it's own disk? Is windows in grub & you just want to make it default, if so- the second answer at https://askubuntu.com/questions/1002...rub-boot-order

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yes each os its own disk but i cant see win10 on grub customizer.only kubuntu os and its details list on app.so the link cant help me.also what is this grub in linux? is grub a program or terminal command?

[jpenguin]

Grub is the bootloader. Could I have a list of you partitions

fdisk -l

&

cat /etc/default/grub

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[comonda2]

ahmet@ahmet:~$ sudo fdisk -l [sudo] password for ahmet:  Disk /dev/sda: 232,9 GiB, 250059350016 bytes, 488397168 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: gpt Disk identifier: 78C78D23-C201-42DE-861C-C141169ED2B2  Device         Start       End   Sectors   Size Type /dev/sda1       2048   1026046   1023999   500M EFI System /dev/sda2    1026048 247835556 246809509 117,7G Microsoft basic data /dev/sda3  247836672 248776703    940032   459M Windows recovery environment /dev/sda4  248778752 249040895    262144   128M Microsoft reserved /dev/sda5  249040896 488396799 239355904 114,1G Microsoft basic data   Disk /dev/sdb: 223,6 GiB, 240057409536 bytes, 468862128 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: 0x695e953d  Device     Boot     Start       End   Sectors   Size Id Type /dev/sdb1  *         2048 117299199 117297152    56G 83 Linux /dev/sdb2       117301246 468860927 351559682 167,7G  5 Extended /dev/sdb5       117301248 132923391  15622144   7,5G 82 Linux swap / Solaris /dev/sdb6       132925440 468860927 335935488 160,2G  7 HPFS/NTFS/exFAT                                                                                                                          

ahmet@ahmet:~$ cat /etc/default/grub                                                                                                                                                             # If you change this file, run 'update-grub' afterwards to update                                                                                                                                # /boot/grub/grub.cfg. # For full documentation of the options in this file, see:                                                                                                                                       #   info -f grub -n 'Simple configuration'                                                                                                                                                                                                                                                                                                                                                        GRUB_DEFAULT="0"                                                                                                                                                                                 GRUB_TIMEOUT_STYLE="hidden"                                                                                                                                                                      GRUB_TIMEOUT="10"                                                                                                                                                                                GRUB_DISTRIBUTOR="`lsb_release -i -s 2> /dev/null || echo Debian`"                                                                                                                               GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"                                                                                                                                                        GRUB_CMDLINE_LINUX=""                                                                                                                                                                                                                                                                                                                                                                             # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"  # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL="console"  # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE="640x480"  # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID="true"  # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true"  # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" ahmet@ahmet:~$

[jpenguin]

I'm not sure, I have Win/Lin different disks on my older BIOS system & they're autodetected.
Try
CORRECTION

sudo nano etc/grub.d/40_custom

NOT

sudo nano /etc/default/grub

And add

menuentry "Windows 10 UEFI/GPT" {
insmod part_gpt
insmod search_fs_uuid
insmod chain
search --fs-uuid --no-floppy --set=root 28cf-35de
chainloader ($root)/EFI/MICROSOFT/BOOT/bootmgfw.efi
}

DOnt forget to run update-grub

If that doesn't work, read https://wiki.archlinux.org/index.php...ode_menu_entry

The files are different in arch, so don't worry about grub-mkconfig

[comonda2]

I'm not sure, I have Win/Lin different disks on my older BIOS system & they're autodetected.
Try

sudo nano /etc/default/grub

And add

menuentry "Windows 10 UEFI/GPT" {
insmod part_gpt
insmod search_fs_uuid
insmod chain
search --fs-uuid --no-floppy --set=root 28cf-35de
chainloader ($root)/EFI/MICROSOFT/BOOT/bootmgfw.efi
}

Dent forget to run update-grub

If that doesn't work, read https://wiki.archlinux.org/index.php...ode_menu_entry

The files are different in arch, so don't worry about /boot/grub/custom.cfg. or grub-mkconfig

I have not tried it yet.I actually liked KDE too.I am thinking of using Kubuntu as my first operating system.so I am curious about it, how can I remake linux a single operating system if these codes work?

[jpenguin]

Those will only add windows to the menu at boot

[comonda2]

I'm not sure, I have Win/Lin different disks on my older BIOS system & they're autodetected.
Try

sudo nano /etc/default/grub

And add

menuentry "Windows 10 UEFI/GPT" {
insmod part_gpt
insmod search_fs_uuid
insmod chain
search --fs-uuid --no-floppy --set=root 28cf-35de
chainloader ($root)/EFI/MICROSOFT/BOOT/bootmgfw.efi
}

Dent forget to run update-grub

If that doesn't work, read https://wiki.archlinux.org/index.php...ode_menu_entry

The files are different in arch, so don't worry about /boot/grub/custom.cfg. or grub-mkconfig

ahmet@ahmet:~$ sudo update-grub
/usr/sbin/grub-mkconfig: 35: /etc/default/grub: menuentry: not found
ahmet@ahmet:~$


not accepted

[oshunluvr]

Uh, yeah that's not the way this is done, menuentries don't go into default/grub

Add the desired custom menuentry to /etc/grub.d/40_custom and save, then make 40_custom an executable file, then run update-grub.

[jlittle]

I'm not sure, I have Win/Lin different disks on my older BIOS system & they're autodetected.
Try

sudo nano /etc/default/grub

And add
[CODE]

That's the wrong file. (/etc/default/grub is a bash script, that usually just sets variables.) The one for such entries is /etc/grub.d/40_custom.

[jpenguin]

Thx, I don't know what I was thinking there