Проверить ширину канала(скорость интернета) на Linux сервере можно одной командой

wget -O - https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py | python

Пример вывода:

Retrieving speedtest.net configuration...
Testing from WorldStream B.V. (62.112.8.86)...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by Pocos bv (Amsterdam) [1.39 km]: 3.93 ms
Testing download speed................................................................................
Download: 521.00 Mbit/s
Testing upload speed................................................................................................
Upload: 835.27 Mbit/s