diff --git a/y_socket_t/src/y_socket_t/y_list_var_tool.c b/y_socket_t/src/y_socket_t/y_list_var_tool.c
index 7fcc82c..4db71f2 100644
--- a/y_socket_t/src/y_socket_t/y_list_var_tool.c
+++ b/y_socket_t/src/y_socket_t/y_list_var_tool.c
@@ -175,10 +175,15 @@ void usage_cmdl(){
   "\tupdate cleanup: to free m_headers lists.\n"
   "\tupdate standby: to suspend all workers, but can receive all task but in queu tasks.\n"
   "\tupdate wakeup: to wakeup all workers, and then execute all tasks in queu.\n"
+  "\tpipe: to pipe string after header to destination:\n"
+  "\t\teg: sendto 192.168.1.142 { \"cmd\" : \"pipe\" }sendto 192.168.1.250 { \"cmd\" : \"get file SOME_FILE_LOCAL\" }\n"
+  "\t\tIt is equivalent to type: sendto 192.168.1.250 { \"cmd\" : \"get file SOME_FILE_LOCAL\" }\n\t\tin node 192.168.1.142.\n"
   "\tupdate remove node [addr]: to remove [addr] in the list.\n"
   "\tupdate add node [addr]: to add [addr] in the list.\n"
   "\tget file [filename]: to ask server to send file named [filename].\n"
   "\t\tfilename can be absolute path or relative working directory path\n"
+  "\t\teg: sendto 192.168.1.142 { \"cmd\" : \"get file FILENAME\" }\n"
+  "\t\twe can specify destination directory eg: sendto 192.168.1.142 { \"cmd\" : \"get file FILENAME\" , \"dst_dir\" : \"DIRECTORY_NEW_OR_ALREADY_EXISTS\" }\n"
   "\tpost file [filename] : to send file [filename] after header.\n"
   "\t\tNeed to add \"seq\" and \"tm\" keys to have good handling, the payload is after the header {}\n"
   "\t\tSee y_socket_send_file_for_node function.\n"