grep查找字符串所在文件和行号，find查找文件所在目录即路径

1、grep -rin "app.te" device/

注意：i-忽略大小写、n-显示行号。

root@ubuntu:/media/t825_/working/t825_g430_20160416# grep -rin "app.te" device/
device/mediatek/common/BoardConfig.mk:56: app.te \
device/mediatek/common/BoardConfig.mk:67: untrusted_app.te \
device/mediatek/common/BoardConfig.mk:68: platform_app.te \
device/mediatek/common/BoardConfig.mk:69: system_app.te \
device/mediatek/common/BoardConfig.mk:191: isolated_app.te \
device/mediatek/common/BoardConfig.mk:207: system_app.te \
device/mediatek/build/build/libs/codegen.mk:83:MTK_CGEN_AP_Temp_CL := $(MTK_CGEN_OUT_DIR)/apeditor/app_temp_db

2、find device/ -name "*app.te"

root@ubuntu:/media/t825_/working/t825_g430_20160416# find device/ -name "*app.te"
device/mediatek/common/sepolicy/platform_app.te
device/mediatek/common/sepolicy/app.te
device/mediatek/common/sepolicy/isolated_app.te
device/mediatek/common/sepolicy/system_app.te
device/mediatek/common/sepolicy/untrusted_app.te