Linux speed test and benchmarking commands are tools I use are these

For cpu:

sysbench --test=cpu --cpu-max-prime=20000 run

For network:

wget -O /dev/null http://speedtest.dal01.softlayer.com/downloads/test100.zip
wget -O /dev/null http://speedtest.sea01.softlayer.com/downloads/test100.zip
wget -O /dev/null http://speedtest.ams01.softlayer.com/downloads/test500.zip

For Disk write speed:

wget http://speedtest.ams01.softlayer.com/downloads/test500.zip
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