linux 如何查看网络流量

Linux系统中，有多种方法可以查看网络流量,以下是一些常用的方法和工具：

使用 ifconfig 命令

ifconfig 是一个传统的网络配置命令，可以用来查看网络接口的流量信息，虽然它已经被 ip 命令取代,但仍然在一些系统上可用。

ifconfig

输出示例：

eth0 Link encap:Ethernet HWaddr 00:0c:29:68:23:45 inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:123456 bytes:12345678 (12.3 MB) TX packets:654321 bytes:65432100 (62.4 MB)

使用 ip 命令

ip 命令是 ifconfig 的现代替代品，功能更强大,也可以用来查看网络流量。

输出示例：

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link/ether 00:0c:29:68:23:45 brd ff:ff:ff:ff:ff:ff RX: bytes packets errors dropped overrun mcast 12345678 123456 0 0 0 0 TX: bytes packets errors dropped carrier collsns 65432100 654321 0 0 0 0

使用 netstat 命令

netstat 命令可以显示网络连接、路由表、接口统计等信息。

netstat -i

输出示例：

使用 vnstat 工具

vnstat 是一个专门用于监控网络流量的工具,可以实时查看和记录网络流量。

安装 vnstat：

sudo apt-get install vnstat

查看实时流量：

vnstat -l

输出示例：

rxBytes/s txBytes/s rxPackets/s txPackets/s eth0: 12.3 62.4 0.1 0.2

使用 nload 工具

nload 是一个实时网络流量监控工具,可以图形化显示网络流量。

安装 nload：

sudo apt-get install nload

运行 nload：

nload eth0

输出示例：

eth0 ----------------------- | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |