diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b01e11a..f7e45153 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how
 * Add `clean` option for clean compile environment (#166)
 * Split up `config` and `global` space into two different environments (#167)
 * Add use of `--show-hidden` option (#168)
+* Add command to generate `ignore` file (#169)
 
 ## 0.8.x
 > Released Mar 08, 2023
diff --git a/cmds/generate/ignore.js b/cmds/generate/ignore.js
new file mode 100644
index 00000000..e0bcac43
--- /dev/null
+++ b/cmds/generate/ignore.js
@@ -0,0 +1,43 @@
+/**
+ * Copyright (C) 2023 Jen-Chieh Shen
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Emacs; see the file COPYING.  If not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+"use strict";
+
+exports.command = ['ignore <name>'];
+exports.desc = 'Generate ignore file using .gitignore templates';
+exports.builder = yargs => yargs
+  .positional(
+    '<name>', {
+      description: 'name of the ignore template',
+      type: 'string',
+    })
+  .options({
+    'output': {
+      description: 'output result to a file; the default is `.gitignore`',
+      alias: 'o',
+      type: 'string',
+      group: TITLE_CMD_OPTION,
+    },
+  });
+
+exports.handler = async (argv) => {
+  await UTIL.e_call(argv, 'generate/ignore'
+                    , argv.name
+                    , UTIL.def_flag(argv.output, '--output', argv.output));
+};
diff --git a/docs/content/en/Development API/_index.md b/docs/content/en/Development API/_index.md
index 8d32dbe8..c37dc1a0 100644
--- a/docs/content/en/Development API/_index.md	
+++ b/docs/content/en/Development API/_index.md	
@@ -39,10 +39,26 @@ Command entry point. Each command file should contain this macro somewhere in th
 
 Points to `lisp` directory from the project root.
 
+```elisp
+(message "%s" eask-lisp-root)  ; path/to/eask/cli/lisp/
+```
+
 ## 🔍 Function: eask-command ()
 
 Return the current command in string.
 
+Suppose the command is:
+
+```sh
+$ eask init
+```
+
+then,
+
+```elisp
+(message "%s" (eask-command))  ; init
+```
+
 ## 🔍 Function: eask-special-p ()
 
 Return `t` if the command that can be run without Eask-file existence.
diff --git a/docs/content/en/Getting Started/Commands and options.md b/docs/content/en/Getting Started/Commands and options.md
index 0be365b4..76b57881 100644
--- a/docs/content/en/Getting Started/Commands and options.md	
+++ b/docs/content/en/Getting Started/Commands and options.md	
@@ -323,12 +323,20 @@ Generate files that are used for the development.
 
 Generate autoload file.
 
+Write a package autoloads to `project-autoloads.el` in the project root.
+
 ```sh
 $ eask [GLOBAL-OPTIONS] generate autoloads
 ```
 
+`project` is the project name, as declared in `Eask`-file. See
+[Multi-file Packages (elisp)](https://www.gnu.org/software/emacs/manual/html_node/elisp/Multi_002dfile-Packages.html#Multi_002dfile-Packages)
+for details.
+
 ## 🔍 eask generate pkg-file
 
+Generate pkg file.
+
 Write a package descriptor file to `project-pkg.el` in the project root.
 
 ```sh
@@ -350,34 +358,54 @@ $ eask [GLOBAL-OPTIONS] generate license <name>
 `name` is the type of the license, see https://api.github.com/licenses for all
 the choices.
 
+{{< hint info >}}
+💡 This command uses the package [license-templates](https://github.com/jcs-elpa/license-templates)
+to generate ignore file.
+{{< /hint >}}
+
+## 🔍 eask generate ignore
+
+Generate ignore file.
+
+```sh
+$ eask [GLOBAL-OPTIONS] generate ignore <name>
+```
+
+{{< hint info >}}
+💡 This command uses the package [gitignore-templates](https://github.com/xuchunyang/gitignore-templates.el)
+to generate ignore file.
+{{< /hint >}}
+
 ## 🔍 eask generate workflow circle-ci
 
 Generate CircleCI workflow yaml file.
 
+The default filename is `config.yml`.
+
 ```sh
 $ eask [GLOBAL-OPTIONS] generate workflow circle-ci [--file]
 ```
 
-{{< hint info >}}
-💡 This will generate the yaml file under `.circleci/`!
-{{< /hint >}}
+This will generate the yaml file under `.circleci/`!
 
 ## 🔍 eask generate workflow github
 
 Generate GitHub Actions workflow yaml file.
 
+The default filename is `test.yml`.
+
 ```sh
 $ eask [GLOBAL-OPTIONS] generate workflow github [--file]
 ```
 
-{{< hint info >}}
-💡 This will generate the yaml file under `.github/workflow/`!
-{{< /hint >}}
+This will generate the yaml file under `.github/workflow/`!
 
 ## 🔍 eask generate workflow gitlab
 
 Generate GitLab Runner workflow yaml file.
 
+The default filename is `.gitlab-ci.yml`.
+
 ```sh
 $ eask [GLOBAL-OPTIONS] generate workflow gitlab [--file]
 ```
@@ -386,6 +414,8 @@ $ eask [GLOBAL-OPTIONS] generate workflow gitlab [--file]
 
 Generate Travis CI workflow yaml file.
 
+The default filename is `.travis.yml`.
+
 ```sh
 $ eask [GLOBAL-OPTIONS] generate workflow travis-ci [--file]
 ```
@@ -725,16 +755,6 @@ Force to uninstall the package `dash` even it's a dependency from another packag
 $ eask -f [COMMAND]
 ```
 
-## 🔍 --development, --dev
-
-Notify command with development scope enabled.
-
-If we attempt to install development dependencies:
-
-```sh
-$ eask --dev [COMMAND]
-```
-
 ## 🔍 --debug
 
 Enable debug information.
diff --git a/lisp/_prepare.el b/lisp/_prepare.el
index 9b39df62..5c18ab5b 100644
--- a/lisp/_prepare.el
+++ b/lisp/_prepare.el
@@ -88,7 +88,8 @@ will return `lint/checkdoc' with a dash between two subcommands."
 
 (defun eask-special-p ()
   "Return t if the command that can be run without Eask-file existence."
-  (member (eask-command) '("init/cask" "cat" "keywords" "generate/license")))
+  (member (eask-command) '("init/cask" "cat" "keywords"
+                           "generate/ignore" "generate/license")))
 
 (defun eask-checker-p ()
   "Return t if running Eask as the checker."
@@ -779,6 +780,7 @@ This uses function `locate-dominating-file' to look up directory tree."
                    (eask-msg "✓ Loading global Eask file in %s... done!" eask-file)
                  (eask-msg "✗ Loading global Eask file... missing!"))
                (message "")
+               (package-activate-all)
                (ignore-errors (make-directory package-user-dir t))
                (eask--with-hooks ,@body))))
           ((eask-config-p)
diff --git a/lisp/core/cat.el b/lisp/core/cat.el
index ae4d16e3..07b60797 100644
--- a/lisp/core/cat.el
+++ b/lisp/core/cat.el
@@ -27,7 +27,6 @@
   ;; Preparation
   (eask-with-archives "melpa"
     (eask-package-install 'e2ansi))
-  (package-activate-all)
   (eask-msg "")
 
   ;; Start the task
diff --git a/lisp/generate/ignore.el b/lisp/generate/ignore.el
new file mode 100644
index 00000000..c38dfd8a
--- /dev/null
+++ b/lisp/generate/ignore.el
@@ -0,0 +1,61 @@
+;;; generate/ignore.el --- Generate ignore file  -*- lexical-binding: t; -*-
+
+;;; Commentary:
+;;
+;; Command use generate ignore file,
+;;
+;;   $ eask generate ignore <name>
+;;
+;;
+;;  Positionals:
+;;
+;;    <name>       Name of the ignore template
+;;
+;;  Optional arguments:
+;;
+;;    --output     Output result to a file; the default is `.gitignore`
+;;
+
+;;; Code:
+
+(let ((dir (file-name-directory (nth 1 (member "-scriptload" command-line-args)))))
+  (load (expand-file-name "_prepare.el"
+                          (locate-dominating-file dir "_prepare.el"))
+        nil t))
+
+(defun eask--print-ignore-menu ()
+  "Print all available ignore."
+  (eask-msg "available via `eask generate ignore`")
+  (eask-msg "")
+  (let ((names (gitignore-templates-names)))
+    (dolist (data names)
+      (eask-msg "  %s" data))
+    (eask-msg "")
+    (eask-info "(Total of %s available ignore file%s)" (length names)
+               (eask--sinr names "" "s"))))
+
+(eask-start
+  ;; Preparation
+  (eask-with-archives "melpa"
+    (eask-package-install 'gitignore-templates))
+
+  ;; Start the task
+  (require 'gitignore-templates)
+  (let* ((name (car (eask-args)))  ; type of the ignore
+         (basename (or (eask-output) ".gitignore"))
+         (filename (expand-file-name basename)))
+    (eask-msg "")
+    (cond ((file-exists-p filename)
+           (eask-info "(The ignore file already exists `%s`)" filename))
+          ((not (member name (gitignore-templates-names)))
+           (eask-info "(Invalid ignore type: `%s`)" name)
+           (eask--print-ignore-menu))
+          (t
+           (eask-with-progress
+             (format "Generating ignore file in %s... " filename)
+             (with-current-buffer (find-file filename)
+               (gitignore-templates-insert name)
+               (save-buffer))
+             "done ✓")))))
+
+;;; generate/ignore.el ends here
diff --git a/lisp/generate/license.el b/lisp/generate/license.el
index e9f60c1e..ae28a078 100644
--- a/lisp/generate/license.el
+++ b/lisp/generate/license.el
@@ -49,9 +49,9 @@
     (license-templates-keys)  ; trigger request
     (eask-msg "")
     (cond ((file-exists-p filename)
-           (eask-info "The license file already exists `%s`" filename))
+           (eask-info "(The license file already exists `%s`)" filename))
           ((not (member name (license-templates-keys)))
-           (eask-info "Invalid license type: `%s`" name)
+           (eask-info "(Invalid license type: `%s`)" name)
            (eask--print-license-menu))
           (t
            (eask-with-progress
diff --git a/test/commands/local/run.sh b/test/commands/local/run.sh
index 3030979c..097b1f33 100644
--- a/test/commands/local/run.sh
+++ b/test/commands/local/run.sh
@@ -62,6 +62,12 @@ eask run -all
 # Exection
 eask eval "(progn (require 'mini.emacs.pkg.1))"
 
+# Generation
+eask generate autoloads
+eask generate pkg-file
+eask generate license gpl-3.0
+eask generate ignore elisp
+
 # Linter
 eask lint checkdoc
 eask lint declare