Update cheatsheets

fastboot

@@ -0,0 +1,37 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# fastboot
+
+> Communicate with connected Android devices when in bootloader mode (the one place `adb` doesn't work).
+> More information: <https://cs.android.com/android/platform/superproject/+/main:system/core/fastboot>.
+
+- Unlock the bootloader:
+
+`fastboot oem unlock`
+
+- Relock the bootloader:
+
+`fastboot oem lock`
+
+- Reboot the device from fastboot mode into fastboot mode again:
+
+`fastboot reboot bootloader`
+
+- Flash a given image:
+
+`fastboot flash {{path/to/file.img}}`
+
+- Flash a custom recovery image:
+
+`fastboot flash recovery {{path/to/file.img}}`
+
+- Display connected devices:
+
+`fastboot devices`
+
+- Display all information of a device:
+
+`fastboot getvar all`