diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4c49bd7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.env
diff --git a/app-old.sh b/app-old.sh
new file mode 100755
index 0000000..d595e8d
--- /dev/null
+++ b/app-old.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# 环境变量
+APP_DIR=$(cd "$(dirname "$0")" && pwd)
+
+# 执行命令
+if [ -f "$APP_DIR/cmds/app-$1.sh" ]; then
+    . "$APP_DIR/cmds/app-$1.sh"
+else
+    echo "Error: usage: ./app.sh <command>"
+    echo "commands:"
+    if [ -d "$APP_DIR/cmds" ]; then
+        for file in "$APP_DIR"/cmds/app-*.sh; do
+            if [ -f "$file" ]; then
+                filename=$(basename "$file")
+                cmd_name=${filename#app-}
+                cmd_name=${cmd_name%.sh}
+                echo "  $cmd_name"
+            fi
+        done
+    fi
+fi
diff --git a/app.sh b/app.sh
index d595e8d..7f14358 100755
--- a/app.sh
+++ b/app.sh
@@ -1,16 +1,23 @@
 #!/bin/bash
 
-# 环境变量
-APP_DIR=$(cd "$(dirname "$0")" && pwd)
+# ********** 环境变量定义 **********
+#
+# 应用所在目录
+APP_HOME=$(cd "$(dirname "$0")" && pwd)
+# 应用名称
+APP_NAME=$(basename "$APP_HOME")
+APP_NAME="${APP_NAME#app-}"
+# 扩展环境变量定义
+if [ -f "$APP_HOME/.env" ]; then
+    . "$APP_HOME/.env"
+fi
 
-# 执行命令
-if [ -f "$APP_DIR/cmds/app-$1.sh" ]; then
-    . "$APP_DIR/cmds/app-$1.sh"
-else
-    echo "Error: usage: ./app.sh <command>"
+app_usage() {
+    echo "usage: $0 <command> [args]"
+    echo;
     echo "commands:"
-    if [ -d "$APP_DIR/cmds" ]; then
-        for file in "$APP_DIR"/cmds/app-*.sh; do
+    if [ -d "$APP_HOME/mods" ]; then
+        for file in "$APP_HOME"/mods/*.sh; do
             if [ -f "$file" ]; then
                 filename=$(basename "$file")
                 cmd_name=${filename#app-}
@@ -19,4 +26,30 @@ else
             fi
         done
     fi
-fi
+    echo;
+    echo "args:"
+    echo "  -h, --help         show the help documentation"
+    echo "  -v, --version      show the version"
+}
+
+app_handle() {
+    if [ ! -f "$APP_HOME/mods/$1.sh" ]; then
+        echo "Error: unknown command [$1]"
+        exit 1
+    fi
+
+    . "$APP_HOME/mods/$1.sh"
+}
+
+case "$1" in
+    -h|--help|"")
+        app_usage
+        ;;
+    -v|--version)
+        echo "v0.0.1"
+        ;;
+    *)
+        app_handle $@
+        ;;
+esac
+
diff --git a/mods/tmux.sh b/mods/tmux.sh
new file mode 100755
index 0000000..c32dbcf
--- /dev/null
+++ b/mods/tmux.sh
@@ -0,0 +1,46 @@
+#!/bin/bash
+
+export TMUX_SESSION="app-$APP_NAME"
+
+case "$2" in
+    -h|--help|"")
+        echo "commands:"
+        echo "  exec              execute tmux with commands"
+        echo "  stat              show the status"
+        echo;
+        echo "args:"
+        echo "  -h, --help        show the help documentation"
+        echo "  -v, --version     show the version"
+        ;;
+    -v|--version)
+        echo "v0.0.1"
+        ;;
+    stat)
+        CURR_TMUX_SESSION=$(tmux list-session 2>&1 | grep "$TMUX_SESSION")
+        if [ -z "$CURR_TMUX_SESSION" ]; then
+            echo "tmux session [$TMUX_SESSION] not exists."
+        else
+            echo "tmux session [$TMUX_SESSION] => $CURR_TMUX_SESSION"
+            tmux attach -t $TMUX_SESSION
+        fi
+        ;;
+    exec)
+        CURR_TMUX_SESSION=$(tmux list-session 2>&1 | grep "$TMUX_SESSION")
+        if [ -n "$CURR_TMUX_SESSION" ]; then
+            echo "tmux session [$TMUX_SESSION] => $CURR_TMUX_SESSION"
+            tmux attach -t $TMUX_SESSION
+        else
+            echo "starting..."
+            tmux new-session -d -s "$TMUX_SESSION"
+            sleep 3
+            if [ -n "$TMUX_COMMAND" ]; then
+                tmux send-keys   -t "$TMUX_SESSION" "$TMUX_COMMAND" Enter
+            fi
+            tmux attach      -t "$TMUX_SESSION"
+        fi
+        ;;
+    *)
+        echo "Invalid command: ${@:2}"
+    ;;
+esac
+