How to upgrade Debian to SID

Optional: Add sudo into your user

$ su
# aptitude install sudo
# usermod -a -G sudo [USERNAME]
# exit

Note: If sudo don't work, try logout and login again.

Replace the belowing text into /etc/apt/sources.list with your favorite editor. In my case I use

$ sudo vi /etc/apt/sources.list

```bash
deb http://ftp.th.debian.org/debian/ sid main contrib non-free
deb-src http://ftp.th.debian.org/debian/ sid main contrib non-free

deb http://ftp.th.debian.org/debian/ stable main contrib non-free
deb http://ftp.th.debian.org/debian/ testing main contrib non-free
deb http://ftp.th.debian.org/debian/ experimental main contrib non-free
```
&gt; Read more about Archive areas:
&gt; [main](https://www.debian.org/doc/debian-policy/ch-archive.html#s-main),
&gt; [contrib](https://www.debian.org/doc/debian-policy/ch-archive.html#s-contrib),
&gt; [non-free](https://www.debian.org/doc/debian-policy/ch-archive.html#s-non-free)

&gt; Note: Replace `http://ftp.th.debian.org/debian/` to your nearest repository

Update a list of repositories
```
$ sudo aptitude update
```
Upgrade your debian version into sid version
```
$ sudo aptitude dist-upgrade
```
After it finished, reboot system
```
$ sudo reboot
```

Optional:

For installing firmware for various drivers in consist of non-free packages or drivers using:
```
$ sudo aptitude install firmware-linux
```
For installing some thai font:
```
$ sudo aptitude install xfonts-thai
```