Somehow, there's /home/zlatan/grub file, owned by root and read-only for basic user.

Its content is exactly this:

# 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_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`

# 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 ...)

# Uncomment to disable graphical terminal (grub-pc only)

# 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'

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux

# Uncomment to disable generation of recovery mode menu entries

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

/etc/default/grub is completely same as /home/zlatan/grub. Its filetype is ASCII text.

I want to know is it safe to remove such file.

  • You probably accidentally copied it from /etc/default. – Pilot6 Aug 13 '16 at 15:25
  • 1
    just to be sure we give you the right advice, edit with the output of cat /etc/default/grub and file /etc/default/grub – Zanna Aug 13 '16 at 15:26

Yes, it is safe to remove this file from your user directory.

There is no value to keep it there, unless as a backup copy.

  • Thank you for clarifying. It really has no use — I deleted it and grub booted normally. – Zlatan Aug 13 '16 at 16:47

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