一／scp限速1M

＃scp -l 1000 文件名  账号@远程机器IP 此时的传输速率就是1M／8＝100K左右

二／rsync是（限制为 100k Bytes/s）：

＃rsync -auvzP--bwlimit=100 本地的文件 远程的文件   参数说明：    v：详细提示 　　a：以archive模式操作，复制目录、符号连接，等价于 -rlptgoD 。 　　z：压缩 　　u：只进行更新，防止本地新文件被重写，注意两者机器的时钟的同时    P：是综合了--partial --progress两个参数，       所以此时的rsync支持了断点续传

[liujianzuo@ow2 201512]$ rsync -avz --bwlimit=500 -e 'ssh -p10001' 2015-12-01-access_wap.log ffff@4.5.2.42:/root/log_wap

The authenticity of host '[124.205.209.42]:10001 ([124.205.209.42]:10001)' can't be established.

RSA key fingerprint is 33:61:43:8a:ca:34:3c:f0:56:45:1a:20:7f:0e:b0:8b.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added '[124.205.209.42]:10001' (RSA) to the list of known hosts.

root@124.205.209.42's password:

sending incremental file list

2015-12-01-access_wap.log

sent 13,951,993 bytes received 34 bytes 416,478.42 bytes/sec

total size is 172,036,811 speedup is 12.33

[liujianzuo@ow2 201512]$