diff --git a/go.mod b/go.mod
index 9c473e7..dd3f454 100644
--- a/go.mod
+++ b/go.mod
@@ -13,7 +13,7 @@ require (
 	github.com/mojocn/base64Captcha v1.3.5
 	github.com/pkg/errors v0.9.1
 	github.com/rogeecn/gen v1.0.11
-	github.com/spf13/cobra v1.5.0
+	github.com/spf13/cobra v1.7.0
 	github.com/spf13/viper v1.15.0
 	go.uber.org/dig v1.15.0
 	go.uber.org/zap v1.21.0
@@ -41,7 +41,7 @@ require (
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
-	github.com/inconshreveable/mousetrap v1.0.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jackc/chunkreader/v2 v2.0.1 // indirect
 	github.com/jackc/pgconn v1.13.0 // indirect
 	github.com/jackc/pgio v1.0.0 // indirect
diff --git a/go.sum b/go.sum
index a770afc..9f2a0dd 100644
--- a/go.sum
+++ b/go.sum
@@ -206,8 +206,7 @@ github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
 github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
-github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
-github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/jackc/chunkreader v1.0.0/go.mod h1:RT6O25fNZIuasFJRyZ4R/Y2BbhasbmZXF9QQ7T3kePo=
 github.com/jackc/chunkreader/v2 v2.0.0/go.mod h1:odVSm741yZoC3dpHEUXIqA9tQRhFrgOHwnPIn9lDKlk=
 github.com/jackc/chunkreader/v2 v2.0.1 h1:i+RDz65UE+mmpjTfyz0MoVTnzeYxroil2G82ki7MGG8=
@@ -360,8 +359,7 @@ github.com/spf13/afero v1.9.3 h1:41FoI0fD7OR7mGcKE/aOiLkGreyf8ifIOQmJANWogMk=
 github.com/spf13/afero v1.9.3/go.mod h1:iUV7ddyEEZPO5gA3zD4fJt6iStLlL+Lg4m2cihcDf8Y=
 github.com/spf13/cast v1.5.0 h1:rj3WzYc11XZaIZMPKmwP96zkFEnnAmV8s6XbB2aY32w=
 github.com/spf13/cast v1.5.0/go.mod h1:SpXXQ5YoyJw6s3/6cMTQuxvgRl3PCJiyaX9p6b155UU=
-github.com/spf13/cobra v1.5.0 h1:X+jTBEBqF0bHN+9cSMgmfuvv2VHJ9ezmFNf9Y/XstYU=
-github.com/spf13/cobra v1.5.0/go.mod h1:dWXEIy2H428czQCjInthrTRUg7yKbok+2Qi/yBIJoUM=
+github.com/spf13/cobra v1.7.0 h1:hyqWnYt1ZQShIddO5kBpj3vu05/++x6tJ6dg8EC572I=
 github.com/spf13/jwalterweatherman v1.1.0 h1:ue6voC5bR5F8YxI5S67j9i582FU4Qvo2bmqnqMYADFk=
 github.com/spf13/jwalterweatherman v1.1.0/go.mod h1:aNWZUN0dPAAO/Ljvb5BEdw96iTZ0EXowPYD95IqWIGo=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
diff --git a/providers/config/config.go b/providers/config/config.go
index ca2246c..fe09343 100644
--- a/providers/config/config.go
+++ b/providers/config/config.go
@@ -5,14 +5,22 @@ import (
 	"github.com/spf13/viper"
 )
 
-func Load(file string) (*viper.Viper, error) {
+func Load(file, app string) (*viper.Viper, error) {
 	v := viper.NewWithOptions(viper.KeyDelimiter("_"))
 	v.AutomaticEnv()
-	v.SetConfigFile(file)
+
+	if file == "" {
+		v.SetConfigType("toml")
+		v.SetConfigName(app)
+		v.AddConfigPath("/etc")
+		v.AddConfigPath("/usr/local/etc")
+	} else {
+		v.SetConfigFile(file)
+	}
+
 	if err := v.ReadInConfig(); err != nil {
 		return nil, err
 	}
-
 	err := container.Container.Provide(func() (*viper.Viper, error) {
 		return v, nil
 	})
diff --git a/providers/database/redis/config.go b/providers/database/redis/config.go
index 8e85a68..a1bc662 100644
--- a/providers/database/redis/config.go
+++ b/providers/database/redis/config.go
@@ -4,10 +4,21 @@ import (
 	"fmt"
 
 	"github.com/go-redis/redis/v8"
+	"github.com/rogeecn/atom/container"
+	"github.com/rogeecn/atom/utils/opt"
 )
 
 const DefaultPrefix = "Redis"
 
+func DefaultProvider() container.ProviderContainer {
+	return container.ProviderContainer{
+		Provider: Provide,
+		Options: []opt.Option{
+			opt.Prefix(DefaultPrefix),
+		},
+	}
+}
+
 type Config struct {
 	Host     string
 	Port     uint
diff --git a/root.go b/root.go
index 7a6fae7..f951169 100644
--- a/root.go
+++ b/root.go
@@ -1,6 +1,7 @@
 package atom
 
 import (
+	"fmt"
 	"log"
 
 	"github.com/pkg/errors"
@@ -18,15 +19,21 @@ var (
 	GroupGrpcServer = dig.Group("grpc_server_services")
 )
 
-func Serve(providers container.Providers, opts ...Option) error {
-	var rootCmd = &cobra.Command{}
-	rootCmd.PersistentFlags().StringVarP(&cfgFile, "config", "c", "config.toml", "config file path")
+func init() {
 
+}
+
+func Serve(providers container.Providers, opts ...Option) error {
+	var rootCmd = &cobra.Command{Use: "app"}
 	for _, opt := range opts {
 		opt(rootCmd)
 	}
-	if err := LoadProviders(cfgFile, providers); err != nil {
-		return err
+
+	defaultCfgFile := fmt.Sprintf(".%s.toml", rootCmd.Use)
+	rootCmd.PersistentFlags().StringVarP(&cfgFile, "config", "c", "", "config file path, lookup in dir: $HOME, $PWD, /etc, /usr/local/etc, filename: "+defaultCfgFile)
+
+	rootCmd.PersistentPreRunE = func(cmd *cobra.Command, args []string) error {
+		return LoadProviders(cfgFile, cmd.Use, providers)
 	}
 
 	withMigrationCommand(rootCmd)
@@ -36,9 +43,9 @@ func Serve(providers container.Providers, opts ...Option) error {
 	return rootCmd.Execute()
 }
 
-func LoadProviders(cfgFile string, providers container.Providers) error {
+func LoadProviders(cfgFile, appName string, providers container.Providers) error {
 	// parse config files
-	configure, err := config.Load(cfgFile)
+	configure, err := config.Load(cfgFile, appName)
 	if err != nil {
 		return errors.Wrapf(err, "load config file: %s", cfgFile)
 	}