diff --git a/weed/shell/command_collection_delete.go b/weed/shell/command_collection_delete.go
index 55c8ddf19..b89fe7fc0 100644
--- a/weed/shell/command_collection_delete.go
+++ b/weed/shell/command_collection_delete.go
@@ -35,6 +35,7 @@ func (c *commandCollectionDelete) Do(args []string, commandEnv *CommandEnv, writ
 	if err = colDeleteCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyBalancing, "-force")
 
 	if err = commandEnv.confirmIsLocked(args); err != nil {
 		return
diff --git a/weed/shell/command_ec_balance.go b/weed/shell/command_ec_balance.go
index 393d44b80..5641c6954 100644
--- a/weed/shell/command_ec_balance.go
+++ b/weed/shell/command_ec_balance.go
@@ -106,6 +106,7 @@ func (c *commandEcBalance) Do(args []string, commandEnv *CommandEnv, writer io.W
 	if err = balanceCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyBalancing, "-force")
 
 	if err = commandEnv.confirmIsLocked(args); err != nil {
 		return
diff --git a/weed/shell/command_ec_decode.go b/weed/shell/command_ec_decode.go
index de22990fa..59c5bf83a 100644
--- a/weed/shell/command_ec_decode.go
+++ b/weed/shell/command_ec_decode.go
@@ -46,6 +46,7 @@ func (c *commandEcDecode) Do(args []string, commandEnv *CommandEnv, writer io.Wr
 	if err = encodeCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *forceChanges, "-force")
 
 	if err = commandEnv.confirmIsLocked(args); err != nil {
 		return
diff --git a/weed/shell/command_ec_rebuild.go b/weed/shell/command_ec_rebuild.go
index f5d1166d2..a2e1f4d44 100644
--- a/weed/shell/command_ec_rebuild.go
+++ b/weed/shell/command_ec_rebuild.go
@@ -63,6 +63,7 @@ func (c *commandEcRebuild) Do(args []string, commandEnv *CommandEnv, writer io.W
 	if err = fixCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyChanges, "-force")
 
 	if err = commandEnv.confirmIsLocked(args); err != nil {
 		return
diff --git a/weed/shell/command_fs_configure.go b/weed/shell/command_fs_configure.go
index 73bb8e5c6..2c4ef2211 100644
--- a/weed/shell/command_fs_configure.go
+++ b/weed/shell/command_fs_configure.go
@@ -71,6 +71,7 @@ func (c *commandFsConfigure) Do(args []string, commandEnv *CommandEnv, writer io
 	}
 
 	if *locationPrefix != "" {
+		infoAboutSimulationMode(writer, *apply, "-apply")
 		locConf := &filer_pb.FilerConf_PathConf{
 			LocationPrefix:    *locationPrefix,
 			Collection:        *collection,
@@ -128,3 +129,10 @@ func (c *commandFsConfigure) Do(args []string, commandEnv *CommandEnv, writer io
 	return nil
 
 }
+
+func infoAboutSimulationMode(writer io.Writer, forceMode bool, forceModeOption string) {
+	if forceMode {
+		return
+	}
+	fmt.Fprintf(writer, "Running in simulation mode. Use \"%s\" option to apply the changes.\n", forceModeOption)
+}
diff --git a/weed/shell/command_remote_mount_buckets.go b/weed/shell/command_remote_mount_buckets.go
index c4411e639..3ed22936f 100644
--- a/weed/shell/command_remote_mount_buckets.go
+++ b/weed/shell/command_remote_mount_buckets.go
@@ -46,10 +46,10 @@ func (c *commandRemoteMountBuckets) Do(args []string, commandEnv *CommandEnv, wr
 	bucketPattern := remoteMountBucketsCommand.String("bucketPattern", "", "match existing bucket name with wildcard characters '*' and '?'")
 	trimBucketSuffix := remoteMountBucketsCommand.Bool("trimBucketSuffix", true, "remote suffix auto generated by 'weed filer.remote.sync'")
 	apply := remoteMountBucketsCommand.Bool("apply", false, "apply the mount for listed buckets")
-
 	if err = remoteMountBucketsCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *apply, "-apply")
 
 	if *remote == "" {
 		_, err = listExistingRemoteStorageMounts(commandEnv, writer)
diff --git a/weed/shell/command_s3_bucket_quota_check.go b/weed/shell/command_s3_bucket_quota_check.go
index 0e0665cc6..f2a0d14f9 100644
--- a/weed/shell/command_s3_bucket_quota_check.go
+++ b/weed/shell/command_s3_bucket_quota_check.go
@@ -36,6 +36,7 @@ func (c *commandS3BucketQuotaEnforce) Do(args []string, commandEnv *CommandEnv,
 	if err = bucketCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyQuotaLimit, "-apply")
 
 	// collect collection information
 	topologyInfo, _, err := collectTopologyInfo(commandEnv, 0)
diff --git a/weed/shell/command_s3_configure.go b/weed/shell/command_s3_configure.go
index cefb1deeb..ddcafd847 100644
--- a/weed/shell/command_s3_configure.go
+++ b/weed/shell/command_s3_configure.go
@@ -42,7 +42,6 @@ func (c *commandS3Configure) Do(args []string, commandEnv *CommandEnv, writer io
 	secretKey := s3ConfigureCommand.String("secret_key", "", "specify the secret key")
 	isDelete := s3ConfigureCommand.Bool("delete", false, "delete users, actions or access keys")
 	apply := s3ConfigureCommand.Bool("apply", false, "update and apply s3 configuration")
-
 	if err = s3ConfigureCommand.Parse(args); err != nil {
 		return nil
 	}
@@ -83,6 +82,7 @@ func (c *commandS3Configure) Do(args []string, commandEnv *CommandEnv, writer io
 		}
 	}
 	if changed {
+		infoAboutSimulationMode(writer, *apply, "-apply")
 		if *isDelete {
 			var exists []int
 			for _, cmdAction := range cmdActions {
@@ -151,6 +151,7 @@ func (c *commandS3Configure) Do(args []string, commandEnv *CommandEnv, writer io
 			}
 		}
 	} else if *user != "" && *actions != "" {
+		infoAboutSimulationMode(writer, *apply, "-apply")
 		identity := iam_pb.Identity{
 			Name:        *user,
 			Actions:     cmdActions,
diff --git a/weed/shell/command_volume_balance.go b/weed/shell/command_volume_balance.go
index b01d348c5..462143e25 100644
--- a/weed/shell/command_volume_balance.go
+++ b/weed/shell/command_volume_balance.go
@@ -70,6 +70,7 @@ func (c *commandVolumeBalance) Do(args []string, commandEnv *CommandEnv, writer
 	if err = balanceCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyBalancing, "-force")
 
 	if err = commandEnv.confirmIsLocked(args); err != nil {
 		return
diff --git a/weed/shell/command_volume_check_disk.go b/weed/shell/command_volume_check_disk.go
index daa64c1bd..6a22a0273 100644
--- a/weed/shell/command_volume_check_disk.go
+++ b/weed/shell/command_volume_check_disk.go
@@ -51,6 +51,7 @@ func (c *commandVolumeCheckDisk) Do(args []string, commandEnv *CommandEnv, write
 	if err = fsckCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyChanges, "-force")
 
 	if err = commandEnv.confirmIsLocked(args); err != nil {
 		return
diff --git a/weed/shell/command_volume_delete_empty.go b/weed/shell/command_volume_delete_empty.go
index 2d842e80a..79e61d38d 100644
--- a/weed/shell/command_volume_delete_empty.go
+++ b/weed/shell/command_volume_delete_empty.go
@@ -39,6 +39,7 @@ func (c *commandVolumeDeleteEmpty) Do(args []string, commandEnv *CommandEnv, wri
 	if err = volDeleteCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyBalancing, "-force")
 
 	if err = commandEnv.confirmIsLocked(args); err != nil {
 		return
diff --git a/weed/shell/command_volume_server_evacuate.go b/weed/shell/command_volume_server_evacuate.go
index f07ea4b79..4adce095d 100644
--- a/weed/shell/command_volume_server_evacuate.go
+++ b/weed/shell/command_volume_server_evacuate.go
@@ -52,6 +52,7 @@ func (c *commandVolumeServerEvacuate) Do(args []string, commandEnv *CommandEnv,
 	if err = vsEvacuateCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyChange, "-force")
 
 	if err = commandEnv.confirmIsLocked(args); err != nil {
 		return
diff --git a/weed/shell/command_volume_tier_move.go b/weed/shell/command_volume_tier_move.go
index 42cd3cf44..4528ca98d 100644
--- a/weed/shell/command_volume_tier_move.go
+++ b/weed/shell/command_volume_tier_move.go
@@ -61,6 +61,7 @@ func (c *commandVolumeTierMove) Do(args []string, commandEnv *CommandEnv, writer
 	if err = tierCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyChange, "-force")
 
 	if err = commandEnv.confirmIsLocked(args); err != nil {
 		return