To limit the bandwith on Debian (as root):
wondershaper <interface> <DL (kbit/s)> <UL (kbit/s)>
To end the limitation:
wondershaper clear <interface>
Interface: eno1, eth0, wlan0, …
Conversion:
1 Mo = 8192 kbit
500 ko = 4096 kbit
200 ko = 1600 kbit
Source : https://www.it-connect.fr/comment-limiter-la-bande-passante-sous-linux/