Linux通過trickle對FTP Client限速

Trickle是一款用戶端帶寬管理軟件。

Trickle通過控制socket數(shù)據(jù)讀寫量來控制和限制應(yīng)用的上傳/下載速度。

ldd工具可以幫我們找出某個(gè)特定的程序是否使用了libc.so庫。如果程序使用了這個(gè)庫，就可以使用trickle來限制它的網(wǎng)絡(luò)帶寬使用。

[root@linuxdrp ~]# which ftp | xargs ldd |grep libc.so

libc.so.6 => /lib64/libc.so.6 (0x00007f8e4c95e000)

主機(jī)自帶的ftp 使用了 libc.so庫，所以trickle可以用來限制ftp的網(wǎng)絡(luò)帶寬。

安裝包

rpm –ivh trickle-1.07-19.el6.x86_64.rpm

測試功能，download限速50k。

[root@linuxdrp sdbs]# trickle -d 50 /usr/kerberos/bin/ftp 10.240.10.15

trickle: Could not reach trickled, working independently: No such file or directory

Connected to 10.240.10.15.

220 cim7tst1 FTP server ready.

…

Name (10.240.10.15:root): sdbs

331 Password required for sdbs.

Password:

230 User sdbs logged in.

Remote system type is UNIX.

Using binary mode to transfer files.

ftp> get brocade200E-1-config.txt

local: brocade200E-1-config.txt remote: brocade200E-1-config.txt

227 Entering Passive Mode (10,240,10,15,131,30)

150 Opening BINARY mode data connection for brocade200E-1-config.txt (12064 bytes).

226 Transfer complete.

12064 bytes received in 0.26 seconds (45 Kbytes/s)

對比不使用限速，抓取同樣的文件

ftp> get brocade200E-1-config.txt

local: brocade200E-1-config.txt remote: brocade200E-1-config.txt

227 Entering Passive Mode (10,240,10,15,232,25)

150 Opening BINARY mode data connection for brocade200E-1-config.txt (12064 bytes).

226 Transfer complete.

12064 bytes received in 0.00095 seconds (1.2e+04 Kbytes/s)

參考文檔：

安裝包下載

https://pkgs.org/download/config(trickle)

Linux 下使用Trickle限制下載/上傳帶寬

https://linux.cn/article-2375-1.html