iftop
iftop
是监控网卡实时流量
的工具
使用方法
iftop: display bandwidth usage on an interface by host
Synopsis: iftop -h | [-npblNBP] [-i interface] [-f filter code]
[-F net/mask] [-G net6/mask6]
-h display this message
-n don't do hostname lookups
-N don't convert port numbers to services
-p run in promiscuous mode (show traffic between other
hosts on the same network segment)
-b don't display a bar graph of traffic
-B Display bandwidth in bytes
-i interface listen on named interface
-f filter code use filter code to select packets to count
(default: none, but only IP packets are counted)
-F net/mask show traffic flows in/out of IPv4 network
-G net6/mask6 show traffic flows in/out of IPv6 network
-l display and count link-local IPv6 traffic (default: off)
-P show ports as well as hosts
-m limit sets the upper limit for the bandwidth scale
-c config file specifies an alternative configuration file
-t use text interface without ncurses
Sorting orders:
-o 2s Sort by first column (2s traffic average)
-o 10s Sort by second column (10s traffic average) [default]
-o 40s Sort by third column (40s traffic average)
-o source Sort by source address
-o destination Sort by destination address
The following options are only available in combination with -t
-s num print one single text output afer num seconds, then quit
-L num number of lines to print
中间切换指令
- 按h切换是否显示帮助
- 按n切换显示本机的IP或主机名
- 按s切换是否显示本机的host信息
- 按d切换是否显示远端目标主机的host信息
- 按t切换显示格式为2行/1行/只显示发送流量/只显示接收流量
- 按N切换显示端口号或端口服务名称
- 按S切换是否显示本机的端口信息
- 按D切换是否显示远端目标主机的端口信息
- 按p切换是否显示端口信息
- 按P切换暂停/继续显示
- 按b切换是否显示平均流量图形条
- 按B切换计算2秒或10秒或40秒内的平均流量
- 按T切换是否显示每个连接的总流量
- 按l打开屏幕过滤功能,输入要过滤的字符,比如ip,按回车后,屏幕就只显示这个IP相关的流量信息
- 按L切换显示画面上边的刻度;刻度不同,流量图形条会有变化
- 按j或按k可以向上或向下滚动屏幕显示的连接记录
- 按1或2或3可以根据右侧显示的三列流量数据进行排序
- 按<根据左边的本机名或IP排序
- 按>根据远端目标主机的主机名或IP排序
- 按o切换是否固定只显示当前的连接
- 按f可以编辑过滤代码,这是翻译过来的说法,我还没用过这个
- 按!可以使用shell命令,这个没用过!没搞明白啥命令在这好用呢
- 按q退出监控
结果说明
- 中间的<= =>这两个左右箭头,表示的是流量的方向
- TX:发送流量
- RX:接收流量
- TOTAL:总流量
- Cumm:运行iftop到目前时间的总流量
- peak:流量峰值
- rates:分别表示过去
2s
、10s
、40s
的平均流量