update

system/sysctl.go

@@ -0,0 +1,25 @@
+package system
+
+import (
+	"os/exec"
+	"strings"
+)
+
+func checkSysctlVersion() bool {
+	out, err := exec.Command("sysctl", "--version").Output()
+	if err != nil {
+		return false
+	}
+	if strings.Contains(string(out), "error") {
+		return false
+	}
+	return true
+}
+
+func getSysctlValue(key string) (string, error) {
+	out, err := exec.Command("sysctl", "-n", key).Output()
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimSpace(string(out)), nil
+}