diff --git a/cmd/sing-box/cmd_check.go b/cmd/sing-box/cmd_check.go
index 55a2911a..559d413c 100644
--- a/cmd/sing-box/cmd_check.go
+++ b/cmd/sing-box/cmd_check.go
@@ -13,7 +13,7 @@ import (
 
 var commandCheck = &cobra.Command{
 	Use:   "check",
-	Short: "check configuration",
+	Short: "Check configuration",
 	Run:   checkConfiguration,
 }
 
diff --git a/cmd/sing-box/cmd_format.go b/cmd/sing-box/cmd_format.go
index 5dc78806..fd2c6e63 100644
--- a/cmd/sing-box/cmd_format.go
+++ b/cmd/sing-box/cmd_format.go
@@ -15,7 +15,7 @@ var commandFormatFlagWrite bool
 
 var commandFormat = &cobra.Command{
 	Use:   "format",
-	Short: "format configuration",
+	Short: "Format configuration",
 	Run:   formatConfiguration,
 }
 
@@ -41,7 +41,7 @@ func formatConfiguration(cmd *cobra.Command, args []string) {
 		logrus.Fatal("encode config: ", err)
 	}
 	if !commandFormatFlagWrite {
-		os.Stdout.Write(buffer.Bytes())
+		os.Stdout.WriteString(buffer.String() + "\n")
 		return
 	}
 	if bytes.Compare(configContent, buffer.Bytes()) == 0 {
@@ -57,5 +57,5 @@ func formatConfiguration(cmd *cobra.Command, args []string) {
 		logrus.Fatal("write output: ", err)
 	}
 	outputPath, _ := filepath.Abs(configPath)
-	os.Stderr.WriteString(outputPath)
+	os.Stderr.WriteString(outputPath + "\n")
 }
diff --git a/cmd/sing-box/cmd_run.go b/cmd/sing-box/cmd_run.go
index 63ab9689..d7df3762 100644
--- a/cmd/sing-box/cmd_run.go
+++ b/cmd/sing-box/cmd_run.go
@@ -15,7 +15,7 @@ import (
 
 var commandRun = &cobra.Command{
 	Use:   "run",
-	Short: "run service",
+	Short: "Run service",
 	Run:   run,
 }
 
diff --git a/cmd/sing-box/cmd_version.go b/cmd/sing-box/cmd_version.go
new file mode 100644
index 00000000..ee399d33
--- /dev/null
+++ b/cmd/sing-box/cmd_version.go
@@ -0,0 +1,20 @@
+package main
+
+import (
+	"os"
+	"runtime"
+
+	C "github.com/sagernet/sing-box/constant"
+	F "github.com/sagernet/sing/common/format"
+	"github.com/spf13/cobra"
+)
+
+var commandVersion = &cobra.Command{
+	Use:   "version",
+	Short: "Print current version of sing-box",
+	Run:   printVersion,
+}
+
+func printVersion(cmd *cobra.Command, args []string) {
+	os.Stderr.WriteString(F.ToString("sing-box version ", C.Version, " (", runtime.Version(), " ", runtime.GOOS, "/", runtime.GOARCH, ")\n"))
+}
diff --git a/cmd/sing-box/main.go b/cmd/sing-box/main.go
index 55770199..bda56fd2 100644
--- a/cmd/sing-box/main.go
+++ b/cmd/sing-box/main.go
@@ -19,18 +19,24 @@ var (
 	disableColor bool
 )
 
+var mainCommand = &cobra.Command{
+	Use:              "sing-box",
+	PersistentPreRun: preRun,
+}
+
+func init() {
+	mainCommand.PersistentFlags().StringVarP(&configPath, "config", "c", "config.json", "set configuration file path")
+	mainCommand.PersistentFlags().StringVarP(&workingDir, "directory", "D", "", "set working directory")
+	mainCommand.PersistentFlags().BoolVarP(&disableColor, "disable-color", "", false, "disable color output")
+
+	mainCommand.AddCommand(commandRun)
+	mainCommand.AddCommand(commandCheck)
+	mainCommand.AddCommand(commandFormat)
+	mainCommand.AddCommand(commandVersion)
+}
+
 func main() {
-	command := &cobra.Command{
-		Use:              "sing-box",
-		PersistentPreRun: preRun,
-	}
-	command.PersistentFlags().StringVarP(&configPath, "config", "c", "config.json", "set configuration file path")
-	command.PersistentFlags().StringVarP(&workingDir, "directory", "D", "", "set working directory")
-	command.PersistentFlags().BoolVarP(&disableColor, "disable-color", "", false, "disable color output")
-	command.AddCommand(commandRun)
-	command.AddCommand(commandCheck)
-	command.AddCommand(commandFormat)
-	if err := command.Execute(); err != nil {
+	if err := mainCommand.Execute(); err != nil {
 		logrus.Fatal(err)
 	}
 }