test: disk used

tools/disk/main/main.go

@@ -12,6 +12,7 @@ func GetDirectoryDiskUsed(directories []string) (uint64, error) {
 	cmd := exec.Command("du", "-s", strings.Join(directories, " "))
 	output, err := cmd.CombinedOutput()
 	if err != nil {
+		fmt.Println(err)
 		return 0, err
 	}
 	lines := strings.Split(string(output), "\n")
@@ -22,6 +23,7 @@ func GetDirectoryDiskUsed(directories []string) (uint64, error) {
 		parseUint, err := strconv.ParseUint(fields[0], 10, 64)
 		fmt.Println("parseUint", parseUint)
 		if err != nil {
+			fmt.Println(err)
 			return 0, err
 		}
 		sum += parseUint