diff --git a/plugins/os-monitor/collector/net/flow.go b/plugins/os-monitor/collector/net/flow.go
index fd6a2a11cb5978f1839804ecd192b45b53f71075..d47b394d4ecb9660c596cba3d7a70a0f2ce05b50 100644
--- a/plugins/os-monitor/collector/net/flow.go
+++ b/plugins/os-monitor/collector/net/flow.go
@@ -174,7 +174,6 @@ func (f *FlowTask) readDevStatDmi(device string, dmi string) (uint64, error) {
 	}
 	ok, content, err := utils.ReadFileWithDefaultRet(path, "")
 	if !ok {
-		fmt.Println(err)
 		return 0, err
 	}
 	return strconv.ParseUint(strings.TrimSpace(content), 10, 64)
diff --git a/plugins/os-monitor/main.go b/plugins/os-monitor/main.go
index 0dbbcd4bae2eab93fe04246756ebae1c8aee3ce1..4b60cc29034e86be7e8d630386651a124586c9fb 100644
--- a/plugins/os-monitor/main.go
+++ b/plugins/os-monitor/main.go
@@ -17,19 +17,16 @@ import (
 func setWorkingDir() {
 	ex, err := os.Executable()
 	if err != nil {
-		fmt.Println("Failed to get program path")
+		fmt.Fprintln(os.Stderr, "Failed to get program path")
 		os.Exit(1)
 	}
 	exPath := filepath.Dir(ex)
 
 	err = os.Chdir(exPath)
 	if err != nil {
-		fmt.Println("Failed to change working dir")
+		fmt.Fprintln(os.Stderr, "Failed to change working dir")
 		os.Exit(1)
 	}
-
-	currentPath, _ := os.Getwd()
-	fmt.Println(currentPath)
 }
 
 // main 是 os-monitor 插件的入口：
diff --git a/plugins/os-monitor/worker.go b/plugins/os-monitor/worker.go
index eb75f71db9dd3ba1ee0cb7c30823f65a176143a0..4a35b4941302b54ff70cc578646f5ae790095855 100644
--- a/plugins/os-monitor/worker.go
+++ b/plugins/os-monitor/worker.go
@@ -1,7 +1,6 @@
 package main
 
 import (
-	"fmt"
 	"time"
 
 	"github.com/robfig/cron/v3"
@@ -106,13 +105,6 @@ func (w *Worker) pushMetrics(metrics []*agent.Metric) error {
 	if len(metrics) == 0 {
 		return nil
 	}
-	names := map[string]bool{}
-	for _, metric := range metrics {
-		names[metric.Name] = true
-	}
-	for name, _ := range names {
-		fmt.Println(name)
-	}
 
 	metricData := &agent.MetricsData{
 		TsNs: uint64(time.Now().UnixNano()),
diff --git a/plugins/sample/main.go b/plugins/sample/main.go
index 05420e4cab2cc862c5c8b99f00551d5a1af180a0..fc8893f67ee43655f922ecca26a1159e090b1366 100644
--- a/plugins/sample/main.go
+++ b/plugins/sample/main.go
@@ -37,5 +37,4 @@ func main() {
 		fmt.Printf("failed to push metrics data, error: %v\n", err)
 		return
 	}
-	fmt.Println("pushed metrics data successfully")
 }
diff --git a/plugins/sysinfo-collector/rpm/rpms.go b/plugins/sysinfo-collector/rpm/rpms.go
index 5ab9349547673eb78dc804eb9303946660f56a22..92e5083ee8b4289e58ec25645673cd4c9368b152 100644
--- a/plugins/sysinfo-collector/rpm/rpms.go
+++ b/plugins/sysinfo-collector/rpm/rpms.go
@@ -35,11 +35,7 @@ func getRpmPackages() ([]*pb.Metric, error) {
 	var res []*pb.Metric
 	select {
 	case <-ctx.Done(): // 超时,可能是机器rpm文件损坏
-		if err := cmd.Process.Kill(); err != nil {
-			fmt.Println("failed to kill 'rpm -qa'")
-		} else {
-			fmt.Println("Process killed")
-		}
+		_ = cmd.Process.Kill()
 		return nil, fmt.Errorf("failed to run rpm cmd, timeout")
 	case err := <-done:
 		if err != nil {
@@ -49,7 +45,7 @@ func getRpmPackages() ([]*pb.Metric, error) {
 		output := outBuffer.String()
 		pattern, err := regexp.Compile(`\[(.*?)\]--\[(.*?)\]--\[(.*?)\]--\[(.*?)\]\n`)
 		if err != nil {
-			fmt.Println("failed to compile regexp")
+			return nil, fmt.Errorf("failed to compile regexp: %w", err)
 		}
 		pkgs := pattern.FindAllStringSubmatch(output, -1)
 		for _, pkg := range pkgs {