code: func changeSysctl() error {
  	sys := sysctl.New()
  	for k, v := range sysctlAdjustments {
  		if err := sys.SetSysctl(k, v); err != nil {
  			return err
  		}
  	}
  
  	return nil
  }
docs: // changeSysctl changes the required network setting in /proc to get
  // keepalived working in the local system.