小编Her*_*rks的帖子

当我试图监控我的互联网带宽时 nethogs

$ sudo nethogs eth0

我收到以下错误：

ioctl failed while establishing local IP for selected device eth0. 
You may specify the device on the command line.

这是输出sudo ip addr：

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever

2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN qlen1000 link/ether 20:6a:8a:5d:5d:1c brd ff:ff:ff:ff:ff:ff

3: usb0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1400 qdisc pfifo_fast state UNKNOWNqlen …

我正在使用带有内置触摸板的笔记本电脑，可在 Windows 7 中运行。但在我切换到 Ubuntu 12.04 LTS 后，它现在无法运行。

我在使用命令复制文件时遇到了问题，

cp ~/Downloads/sample.pdf ~/Desktop/

但是终端给了我一条消息，cp: cannot stat 'sample.pdf': No such file or directory.