diff --git a/install.sh b/install.sh
index 8a5da51..6f6f45a 100644
--- a/install.sh
+++ b/install.sh
@@ -110,6 +110,7 @@ echo -----------------------------------------------
 gettar
 echo -----------------------------------------------
 echo ShellClash 已经安装成功!
+[ "$USER" != "root" ] && echo "请执行【source ~/.bashrc &> /dev/null】命令以加载环境变量！"
 echo -----------------------------------------------
 $echo "\033[33m输入\033[30;47m clash \033[0;33m命令即可管理！！！\033[0m"
 echo -----------------------------------------------
diff --git a/scripts/clash.sh b/scripts/clash.sh
index 1b1d576..5f4aec0 100644
--- a/scripts/clash.sh
+++ b/scripts/clash.sh
@@ -386,10 +386,10 @@ macfilter(){
 		fi
 	}
 	echo -----------------------------------------------
-	[ -z "$dhcpdir" ] && dhcpdir='/var/lib/dhcp/dhcpd.leases'
-	[ -z "$dhcpdir" ] && dhcpdir='/var/lib/dhcpd/dhcpd.leases'
-	[ -z "$dhcpdir" ] && dhcpdir='/tmp/dhcp.leases'
-	[ -z "$dhcpdir" ] && dhcpdir='/tmp/dnsmasq.leases'
+	[ -z "$dhcpdir" ] && [ -f /var/lib/dhcp/dhcpd.leases ] && dhcpdir='/var/lib/dhcp/dhcpd.leases'
+	[ -z "$dhcpdir" ] && [ -f /var/lib/dhcpd/dhcpd.leases ] && dhcpdir='/var/lib/dhcpd/dhcpd.leases'
+	[ -z "$dhcpdir" ] && [ -f /tmp/dhcp.leases ] && dhcpdir='/tmp/dhcp.leases'
+	[ -z "$dhcpdir" ] && [ -f /tmp/dnsmasq.leases ] && dhcpdir='/tmp/dnsmasq.leases'
 	[ -z "$dhcpdir" ] && dhcpdir='/dev/null'
 	[ -z "$macfilter_type" ] && macfilter_type='黑名单' 
 	[ "$macfilter_type" = "黑名单" ] && macfilter_over='白名单' || macfilter_over='黑名单'