Linux & tree
https://www.computerhope.com/unix/tree.htm
https://www.computerhope.com/unix/tree.htm#examples
https://linux.die.net/man/1/tree
https://www.cyberciti.biz/faq/linux-show-directory-structure-command-line/
https://www.ostechnix.com/view-directory-tree-structure-linux/
http://mama.indstate.edu/users/ice/tree/
# all
$ tree
# folder only
$ tree -d
# src folder
$ tree src
# ignore folder
$ tree -I "node_modules*"
D: 00-testinglight-ios-apph5_app>bash
xgqfrms@NB:/mnt/d/000-testing/light-ios-app/h5_app$ tree
#
├── app.js
├── app.less
├── css
│ ├── reset.css
│ └── style.less
├── images
│ ├── about-active.png
│ ├── about.png
│ ├── contact-active.png
│ ├── contact.png
│ ├── home-active.png
│ ├── home.png
│ ├── more.png
│ └── scan.png
├── index.html
├── lib
│ ├── package.json
│ └── px2rem.js
├── project.json
├── ui
│ └── ui.vue
└── view
├── index
│ ├── about.vue
│ ├── contact.vue
│ └── home.vue
└── index.vue
# 6 directories, 21 files
xgqfrms@NB:/mnt/d/000-testing/light-ios-app/h5_app$
tree level
$ tree -L 3 -I "node_modules|bower_components"
https://www.cnblogs.com/xgqfrms/p/10729411.html