adb 调试时出现权限不足
Administrator@aaron MINGW64 ~ $ adb shell * daemon not running. starting it now on port 5037 * * daemon started successfully * shell@firefly:/ $ cd sys/dvfs cd sys/dvfs shell@firefly:/sys/dvfs $ ls ls cpu_temp_enable cpu_temp_target dvfs_tree shell@firefly:/sys/dvfs $ cat dvfs_tree cat dvfs_tree /system/bin/sh: cat: dvfs_tree: Permission denied
权限不足是因为没有获取 root 权限，需要先使用 adb root 获取 root 权限，再进 adb shell 。
Administrator@aaron MINGW64 ~ $ adb root * daemon not running. starting it now on port 5037 * * daemon started successfully * restarting adbd as root Administrator@aaron MINGW64 ~ $ adb shell root@firefly:/ # cd sys/dvfs cd sys/dvfs root@firefly:/sys/dvfs # ls ls cpu_temp_enable cpu_temp_target dvfs_tree root@firefly:/sys/dvfs # cat dvfs_tree cat dvfs_tree