# Change editor to vi:
sudo update-alternatives --config editor

# Change sudo to avoid asking for password each time:
sudo visudo
%sudo	ALL=(ALL:ALL) NOPASSWD: ALL

# System failed to show grub boot menu with option to boot Windows and only booted Ubuntu
# Note: installed using manual file system creation /boot and / only and system seemed to not install grub to MBR initially
#
# To Try:
Possible grub fix after Ubuntu install
(Note: Need to try this instead of boot repair)
# Run as root
grub-install /dev/sda
update-grub
# May need to also do this:
Unhide GRUB boot menu in sda4/boot/grub/grub.cfg
#
# Previously, used boot-repair to repair grub:
sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt update
sudo apt install -y boot-repair && boot-repair
Boot successfully repaired.
A new file (/var/log/boot-repair/20231231_192923/Boot-Info_20231231_1929.txt) will open in your text viewer.
The default repair of the Boot-Repair utility will reinstall the grub2 of sda4 into the MBR of sda.
Grub-efi will not be selected by default because no ESP detected.
Additional repair will be performed: unhide-bootmenu-10s
Unhide GRUB boot menu in sda4/etc/default/grub
grub-install /dev/sda
Installing for i386-pc platform.



#Set Windows to be default boot
See also: https://askubuntu.com/questions/52963/how-do-i-set-windows-to-boot-as-the-default-in-the-boot-loader
#
Get correct Windows menuentry from this command.
sudo grep menuentry /boot/grub/grub.cfg
Example:
Windows 10 (on /dev/sda1)
#
/etc/grub.d
/etc/default/grub
#
See information on option in the /etc/default/grub file:
info -f grub -n 'Simple configuration'
#
sudo vi /etc/default/grub
#
Option 1: enable SAVEDEFAULT so that whichever option you choose is the default on next boot:
Change or add these settings:
GRUB_DEFAULT=saved
GRUB_SAVEDEFAULT=true
GRUB_TIMEOUT=3
#
Option 2: specify the default boot menuitem:
Change this line:
GRUB_DEFAULT=0
To this:
GRUB_DEFAULT="Windows 10 (on /dev/sda1)"
#
Save the file and exit
#
Run this to update /boot/grub/grub.cfg
sudo update-grub



Set rtc to use local time if using dual boot Ubuntu and Windows (so Windows boots correct time after booting from Ubuntu):
(See also: https://www.howtogeek.com/323390/how-to-fix-windows-and-linux-showing-different-times-when-dual-booting/ )
timedatectl set-local-rtc 1

# upgrade system:
sudo apt-get update
sudo apt-get upgrade

# show installed packages
sudo dpkg -l

# Compare RHEL vs Ubuntu differences:
https://cmdref.net/os/linux/note/rhel-vs-ubuntu


# Package install - to set scaling of login page to 200%:
Login Manager Settings
Then run and "Apply current display settings"
And click Apply by "Login Manager Settings" and wait for it to finish


# Mount local drives:
ls -l /dev/disk/by-uuid
sudo mkdir /l
sudo mkdir /m
sudo vi /etc/fstab
/dev/disk/by-uuid/L_UUID_NUMBER_GOES_HERE /l ntfs-3g rw,nosuid,nodev,relatime,uid=1000,gid=1000,dmask=027,fmask=137,iocharset=utf8 0 0
/dev/disk/by-uuid/M_UUID_NUMBER_GOES_HERE /m ntfs-3g rw,nosuid,nodev,relatime,uid=1000,gid=1000,dmask=027,fmask=137,iocharset=utf8 0 0
sudo mount /l
sudo mount /m
sudo systemctl daemon-reload

# How to open specific file system path in "Files" in Ubuntu:
Note: in "Files" use "CTRL+L" to open specific path in file system

# CIFS mount examples:
sudo apt-get install cifs-utils
sudo mkdir /r
sudo mkdir /s
sudo vi /root/.smbcredentials
username=NAS_SHARE_USERNAME
password=NAS_SHARE_PASSWORD
sudo chmod 600 /root/.smbcredentials
sudo vi /etc/fstab
//NAS-SERVER-IP/data /r cifs credentials=/root/.smbcredentials,vers=2.0,ro,nosuid,nodev,relatime,uid=1000,gid=1000,file_mode=0440,dir_mode=0550,iocharset=utf8 0 0
//NAS-SERVER-IP/share /s cifs credentials=/root/.smbcredentials,vers=2.0,rw,nosuid,nodev,relatime,uid=1000,gid=1000,file_mode=0660,dir_mode=0770,iocharset=utf8 0 0
sudo mount /r
sudo mount /s
sudo systemctl daemon-reload

install syncthing: see "ubuntu-syncthing-install-notes.txt"

Turn off shutdown extra prompt (run commands as logged in user, NOT root):
Show current setting:
gsettings get org.gnome.SessionManager logout-prompt
true
Change setting to false:
gsettings set org.gnome.SessionManager logout-prompt false
Show current setting:
gsettings get org.gnome.SessionManager logout-prompt
false






OLD OPTIONS:
------------
# Mute ACPI BIOS Errors on boot:
sudo vi /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT='quiet splash loglevel=3'
sudo update-grub
reboot