wqf@wqf-System-Product-Name:/work/rk3188/rk3188_jb422$ ​find  -name MTK_MT6622_E2_Patch.nb0

./out/target/product/rk30sdk/recovery/root/system/etc/firmware/MTK_MT6622_E2_Patch.nb0

./out/target/product/rk30sdk/system/etc/firmware/MTK_MT6622_E2_Patch.nb0

./external/wlan_loader/firmware/MTK_MT6622_E2_Patch.nb0

wqf@wqf-System-Product-Name:/work/rk3188/rk3188_jb422$ ​whereis find

find: /usr/bin/find /usr/bin/X11/find /usr/share/man/man1/find.1.gz

wqf@wqf-System-Product-Name:/work/rk3188/rk3188_jb422$