nc
是个好东西~~~
用到的有功能有:
- 传输文件
- 测试带宽
- 发包测试
- …
关于测试网络带宽:
# 主机A
nc -l -p 22222 < /dev/zero
# 主机B
nc ip_of_hostA 22222 > /dev/null
然后顺便也搜到网上这篇的方法,发现了 pv
(monitor the progress of data through a pipe) 这个命令。
比如:
# 主机A
nc -l -p 22222 < /dev/null
# 主机B
nc localhost 22222 | pv
然后可以显示传输的总流量大小和速率:
2.66GiB 0:01:10 [ 40MiB/s ] [ <=> ]
另外还看到很多人推荐使用 iperf
(tool to measure IP bandwidth using UDP or TCP) 工具,看它的介绍就是用来测试带宽的:
# Server
tankywoo@gentoo-local::~/ » iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 4] local 127.0.0.1 port 5001 connected with 127.0.0.1 port 56071
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-10.0 sec 27.0 GBytes 23.2 Gbits/sec
# Client
tankywoo@gentoo-local::~/ » iperf -c localhost
------------------------------------------------------------
Client connecting to localhost, TCP port 5001
TCP window size: 647 KByte (default)
------------------------------------------------------------
[ 3] local 127.0.0.1 port 56071 connected with 127.0.0.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 27.0 GBytes 23.2 Gbits/sec
网上有两篇讲得不错的: