Configuring default boot kernel on Ubuntu Linux

Check kernels lists.

grep menuentry /boot/grub/grub.cfg

 

Edit the file

sudo gvim /etc/default/grub

My case

from GRUB_DEFAULT=0 to

GRUB_DEFAULT=”1>Ubuntu, with Linux 4.4.0-141-lowlatency”

GRUB_DEFAULT="Advanced options for Ubuntu>Ubuntu, with Linux 4.4.0-141-lowlatency"

also fine.

sudo update-grub

This worked!!

My /boot/grub/grub.cfg file.

# 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="1>Ubuntu, with Linux 4.4.0-141-lowlatency"
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
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"

GRUB_BACKGROUND="/home/masa/Downloads/Pictures/Mount_Everest_as_seen_from_Drukair2_PLW_edit.jpg"

 

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