If you only have access to a Linux Console, it will be difficult to you check the Internet Speed with the usual tools for this measure.
An alternative would be the command line tool that speedtest-cli offers:
wget -O speedtest-cli https://raw.github.com/sivel/speedtest-cli/master/speedtest_cli.py chmod +x speedtest-cli ./speedtest-cli
You should get an output like this:
Retrieving speedtest.net configuration... Retrieving speedtest.net server list... Testing from Comcast Cable (x.x.x.x)... Selecting best server based on ping... Hosted by FiberCloud, Inc (Seattle, WA) [12.03 km]: 44.028 ms Testing download speed........................................ Download: 32.29 Mbit/s Testing upload speed.................................................. Upload: 5.18 Mbit/s
See ya!