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# To enter UEFI setup, press ESC when turn on# But grub shell appears at first time.
grub> reboot
# After reboot, Can select boot options (in TeraTerm/minicom)# 'Press ESCAPE for boot options ...' will appear and press ESC
SSH
At the first time, it is preferred to update APT packages.
# In my case, 97 packages upgraded
sudo apt-get update -y && sudo apt-get upgrade -y
timezone setting
Current default time zone: 'Asia/Seoul'
Local time is now: Wed Jul 5 23:10:51 KST 2023.
Universal Time is now: Wed Jul 5 14:10:51 UTC 2023.
Run 'dpkg-reconfigure tzdata'if you wish to change it.
If device is located outside of Korea(South)
### type below to set up timezone## timezone for Ubuntu# Solution 1) interactive mode
sudo dpkg-reconfigure tzdata
# Solution 2)
sudo timedatectl set-timezone America/Chicago
## timezone for snap (optional)
sudo snap set system system.timezone="America/Chicago"## check ubuntu timezone
timedatectl