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commandlinefu.com is the place to record those command-line gems that you return to again and again.

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May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
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Psst. Open beta.

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Test network performance, copying from the mem of one box, over the net to the mem of another

Terminal - Test network performance, copying from the mem of one box, over the net to the mem of another
dd if=/dev/zero bs=256M count=1 | nc [remoteIP] [remotePort] and on the other host nc -l port >/dev/null
2009-07-14 20:30:52
User: tkunz
Functions: dd host
0
Test network performance, copying from the mem of one box, over the net to the mem of another

Note, the [remotePort] should be opened in the firewall first. First, start the destination box listening, then fire off the sending box. Data from the /dev/zero device in memory of the source machine is read out using dd, sent over the network with nc, and read back in from the other side of the network with nc, going to the /dev/null device. Essentially, it is a memory-network-memory copy operation, the output of dd will tell you how fast your network really is performing.

Alternatives

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Terminal - Alternatives

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What others think

Check negotiated ethernet segment speed:

sudo ethtool eth1
Comment by bwoodacre 386 weeks and 1 day ago

Your point of view

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