1. Hackintosh
2. MacOS initial Setup
3. MacOS shortcuts
4. Xcode

• Ubuntu Live CD or Ubutu with UEFI mode: /dev/sda
• the bios-boot usb-drive: /dev/sdc

1. Boot UEFI Ubuntu.
2. verify your mode by
   $ [ -d /sys/firmware/efi ] && echo UEFI || echo BIOS
   The result should be "UEFI".
3. $ sudo mount /dev/sdc1 /mnt
4. $ sudo mkdir -p /mnt/boot/efi
5. $ sudo mount /dev/sda2 /mnt/boot/efi/ # /dev/sda2 FAT32 with flag of esp(EFI)
6. $ sudo mount --bind /dev/ /mnt/dev/
7. $ sudo mount --bind /proc/ /mnt/proc/
8. $ sudo mount --bind /sys/ /mnt/sys/
9. $ sudo mount --bind /run/ /mnt/run/
10. $ modprobe efivars
11. $ sudo chroot /mnt

    ---

12. # apt-get install grub-efi-amd64
13. # grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=Ubuntu --recheck --no-floppy --debug

0. You are supposed to have a google account.
1. Make, say, a google spread sheet file.
2. Share the file with your another email account.
3. You will get an invitation mail with the other account
4. open the shared file and try to edit it
5. You will ask to create a google account; you can create one either with the invited mail address or a new google account. Choose the latter.
6. You will be asked to enter a phone number but you can proceed without giving one.
7. Enjoy!

1. $ cd public_html
2. $ svn export ./ ../pub-export/
3. $ cd ..
4. $ tar -cvzf pub20221202.tgz pub-export

• SD card: 40MB
• USB2.0 -> USB 3.0: 20MB.

1. delete all metadata: $ exiftool -All= image.jpg
2. add Creator tag: $ exiftool -Creator="RICHO MP 1301 JPN" image.jpg
3. add Producer tag: $ exiftool -Producer="RICHO MP 1301 JPN" image.jpg

1. when you install it, right click --> property --> compatibility tab --> Choose WindowsXP Service Pack2.

    $ openvpn3 config-import --config vpngate_219.100.37.144_tcp_443.ovpn
    $ openvpn3 session-start --config-path /net/openvpn/v3/configuration/4451d3eaxb9d1x4ccdxa5a4xc3c162ec7d55
  

1. https://help.ubuntu.com/community/mkusb/gui

   $sudo add-apt-repository universe  # only for standard Ubuntu
   $sudo add-apt-repository ppa:mkusb/ppa  # and press Enter
   $sudo apt update
   
   $sudo apt install mkusb
   $sudo apt install usb-pack-efi    # for UEFI
   $sudo apt install mkusb-plug
   
   $sudo mkusb
   

2. Press d (dus) and follow the instructions.
1. p(persistent)
2. check EFI
3. when you install Ubuntu 20.04LTS on a disk.
1. It will complain that /cdrom can not be unmounted.
2. $ sudo umount -l -r -f /cdrom

1. Download and rufus and Windows10.iso.
2. burn Windows.iso with Rufus.
3. It will be UEFI bootable.

1. Run "command prompt" with admin previledge.
2. Type "powercfg /requests
3. You will see what programs hinders your PC's hypernation.