# Flashing YunoHost ISO on a USB key or CD/DVD
Now that you have the ISO image of YunoHost, you have to put it on a physical medium: **USB key** or **CD/DVD**
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## USB key
### With Etcher
Download Etcher for your operating system and install it.
Put your USB key on, select your YunoHost ISO and click "Flash"
### With UNetbootin
Download UNetbootin for your operating system and install it.
Put your USB key on, select your YunoHost ISO and click "OK"
### With `dd`
If you know your way around command line, you may also flash your USB key with
`dd`. Assuming your USB key is `/dev/sdb` (be careful !!), you may run :
```bash
dd if=/path/to/yunohost.iso of=/dev/sdb
```
---
## CD/DVD
The software to use differs regarding your operating system.
* On Windows, use [ImgBurn](http://www.imgburn.com/) to write the image file on the disc
* On Mac OS, use [Disk Utility](http://support.apple.com/kb/ph7025)
* On GNU/Linux, you have plenty of choices, like [Brasero](https://wiki.gnome.org/Apps/Brasero) or [K3b](http://www.k3b.org/)