I use
iperf. It's a client server arrangement in that you run it in server mode at one end and connect to its from another computer on the other side of the network.
One both machines run:
sudo apt-get install iperf
We'll start an
iperf server on one of the machines:iperf -s
And then on the other computer, tell
iperf to connect as a client:iperf -c <address of other computer>
oli@bert:~$ iperf -c tim
------------------------------------------------------------
Client connecting to tim, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.4 port 37248 connected with 192.168.0.5 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 1.04 GBytes 893 Mbits/sec
Of course, if you're running a firewall on the server machine, you'll need to allow connections on port 5001 or change the port with the
-p flag.
You can do pretty much the same thing with plain old
nc (netcat) if you're that way inclined. On the server machine:nc -vvlnp 12345 >/dev/null
And the client can pipe a gigabyte of zeros through
dd over the nc tunnel.dd if=/dev/zero bs=1M count=1K | nc -vvn 10.10.0.2 12345
As demod:
$ dd if=/dev/zero bs=1M count=1K | nc -vvn 10.10.0.2 12345
Connection to 10.10.0.2 12345 port [tcp/*] succeeded!
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 9.11995 s, 118 MB/s
The timing there is given by
dd but it should be accurate enough as it can only output as fast the pipe will take it. If you're unhappy with that you could wrap the whole thing up in a time call.
Remember that the result is in megabytes so multiply it by 8 to get a megabits-per-second speed. The demo above is running at 944mbps.
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original post from here
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original post from here
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