diff --git a/bin/as.sh b/bin/as.sh
index 827cc3d36..805e4b2d3 100755
--- a/bin/as.sh
+++ b/bin/as.sh
@@ -652,13 +652,13 @@ parse_arguments()
         # check the process already using telnet port if equals to target pid
         if [[ ($telnetPortPid) && ($TARGET_PID != $telnetPortPid) ]]; then
             echo "[ERROR] Target process $TARGET_PID is not the process using port $TELNET_PORT, you will connect to an unexpected process."
-            echo "[ERROR] 1. Try to restart as.sh, select process $telnetPortPid, shutdown it first."
+            echo "[ERROR] 1. Try to restart as.sh, select process $telnetPortPid, shutdown it first with running the 'shutdown' command."
             echo "[ERROR] 2. Try to use different telnet port, for example: as.sh --telnet-port 9998 --http-port -1"
             exit 1
         fi
         if [[ ($httpPortPid) && ($TARGET_PID != $httpPortPid) ]]; then
             echo "Target process $TARGET_PID is not the process using port $HTTP_PORT, you will connect to an unexpected process."
-            echo "1. Try to restart as.sh, select process $httpPortPid, shutdown it first."
+            echo "1. Try to restart as.sh, select process $httpPortPid, shutdown it first with running the 'shutdown' command."
             echo "2. Try to use different http port, for example: as.sh --telnet-port 9998 --http-port 9999"
             exit 1
         fi
diff --git a/boot/src/main/java/com/taobao/arthas/boot/Bootstrap.java b/boot/src/main/java/com/taobao/arthas/boot/Bootstrap.java
index 005fe1e75..5f10d0340 100644
--- a/boot/src/main/java/com/taobao/arthas/boot/Bootstrap.java
+++ b/boot/src/main/java/com/taobao/arthas/boot/Bootstrap.java
@@ -321,7 +321,7 @@ public class Bootstrap {
         if (telnetPortPid > 0 && pid != telnetPortPid) {
             AnsiLog.error("Target process {} is not the process using port {}, you will connect to an unexpected process.",
                             pid, bootstrap.getTelnetPort());
-            AnsiLog.error("1. Try to restart arthas-boot, select process {}, shutdown it first.",
+            AnsiLog.error("1. Try to restart arthas-boot, select process {}, shutdown it first with running the 'shutdown' command.",
                             telnetPortPid);
             AnsiLog.error("2. Or try to use different telnet port, for example: java -jar arthas-boot.jar --telnet-port 9998 --http-port -1");
             System.exit(1);
@@ -330,7 +330,7 @@ public class Bootstrap {
         if (httpPortPid > 0 && pid != httpPortPid) {
             AnsiLog.error("Target process {} is not the process using port {}, you will connect to an unexpected process.",
                             pid, bootstrap.getHttpPort());
-            AnsiLog.error("1. Try to restart arthas-boot, select process {}, shutdown it first.",
+            AnsiLog.error("1. Try to restart arthas-boot, select process {}, shutdown it first with running the 'shutdown' command.",
                             httpPortPid);
             AnsiLog.error("2. Or try to use different http port, for example: java -jar arthas-boot.jar --telnet-port 9998 --http-port 9999", httpPortPid);
             System.exit(1);