Android Tools (ADB, Fastboot, etc)

Android Tools (ADB, Fastboot, etc) on Ubuntu Linux

How to install Android Tools:
- $ sudo apt install android-tools-adb
- $ sudo apt install android-tools-fastboot
ADB
- $ adb devices
  don't forget tap "give access permission" on your android device.
- $ adb usb # enable a usb connection.
- $ adb shell # run a shell on your android device.
- $ adb reboot bootloader
- $ adb reboot recovery
Fastboot (is not supported by Samsung, use heimdall instead.)
- $ fastboot flash boot boot.img # install a new kernel.
- $ fastboot flash recovery recovery.img # install a new recovery system
- $ fastboot oem unlock
heimdall on Ubuntu20.04LTS. (use this binary)
It is buggy. Use Ubuntu 20.04LTS which seems most stable.
Windows Version gives you an error.
Ubuntu18.04LTS gives you a nightmere as well.
- $ heimdall detect
  device detected
- $ heimdall download-pit --output s8.pit
- $ heimdall print-pit --file s8.pit
- $ heimdall flash --BOOT boot.img

TWRP

Get Logs of patch, eg. Magisk, no-verity-opt-encryption and so on.
1. Insert sdcard.
2. Tap advanced -> Copy Log
3. The recovery log will be saved to /external_sd/recovery.log.
4. download it to your pc by $ adb pull /external_sd/recovery.log.

How to extract boot.img

Get a recovery log.

Install TWRP and boot to TWRP. You need to find where is /boot.

open the log and find /boot.

	      Partition Logs:
/boot | /dev/block/sda17 | Size: 64MB
   Flags: Can_Be_Backed_Up IsPresent Can_Flash_Img 
   Primary_Block_Device: /dev/block/sda17
   Display_Name: Boot
   Storage_Name: boot
   Backup_Path: /boot
   Backup_Name: boot
   Backup_Display_Name: Boot
   Storage_Path: /boot
   Current_File_System: emmc
   Fstab_File_System: emmc
   Backup_Method: dd

# dd if=/dev/block/sda17 of=/external_sd/boot_extracted.img
(PC) adb pull /external_sd/boot_extracted.img

Reference:

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