# Le command not working, leaf and WP77 SDK successfully installed

**URL:** <https://forum.legato.io/t/le-command-not-working-leaf-and-wp77-sdk-successfully-installed/6967>\
**Category:** Uncategorized\
**Created:** [December 8, 2025, 2:37pm UTC](https://forum.legato.io/t/le-command-not-working-leaf-and-wp77-sdk-successfully-installed/6967 "2025-12-08T14:37:43Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![fsdabharati](https://avatars.discourse-cdn.com/v4/letter/f/e0b2c6/32.png) [@fsdabharati](https://forum.legato.io/u/fsdabharati)\
**Post date:** [December 8, 2025, 2:37pm UTC](https://forum.legato.io/t/le-command-not-working-leaf-and-wp77-sdk-successfully-installed/6967/1 "2025-12-08T14:37:43Z")

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Data -

WSL  
Ubuntu 20.04  
Leaf 2.4.0  
WP77\_5.0.3

 ![image](https://us1.discourse-cdn.com/flex019/uploads/legato1/original/2X/7/7a9cb1b5834cc5132a4fb5a957d993474099430a.png)

I am not able to use le commands to create a new app. What is the problem. I am facing below issue

abharati@fsdclient0598:~/myWorkspace$ le create-app helloWorld

Command ‘le’ not found, but can be installed with:

sudo apt install le

@jyijyi

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [December 8, 2025, 2:41pm UTC](https://forum.legato.io/t/le-command-not-working-leaf-and-wp77-sdk-successfully-installed/6967/2 "2025-12-08T14:41:07Z")

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What is le command actually?

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<div class="post-metadata">

**Author:** ![fsdabharati](https://avatars.discourse-cdn.com/v4/letter/f/e0b2c6/32.png) [@fsdabharati](https://forum.legato.io/u/fsdabharati)\
**Post date:** [December 8, 2025, 2:43pm UTC](https://forum.legato.io/t/le-command-not-working-leaf-and-wp77-sdk-successfully-installed/6967/3 "2025-12-08T14:43:11Z")

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![image](https://us1.discourse-cdn.com/flex019/uploads/legato1/original/2X/f/fb1b7ced7cbb33ecf6a398d0789cb0f26994b74c.png)

It is used to create apps, But if it is not the correct method to create apps for legato then please guide me how to proceed to make a simple hellow world app using legato framework.

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [December 8, 2025, 2:48pm UTC](https://forum.legato.io/t/le-command-not-working-leaf-and-wp77-sdk-successfully-installed/6967/4 "2025-12-08T14:48:11Z")

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You can see here

> **[Legato Plugin for VSCode - Legato Docs](https://docs.legato.io/latest/tools_vsCode.html)**
>
> legato™ is an open source Linux-based embedded platform designed to simplify connected IoT application development