前言

使用ifconfig 和 apt install ifconfig 命令失败，如下：

root@c83011ff7528:/$ ifconfig
bash: ifconfig: command not found

root@c83011ff7528:/# apt install ifconfig
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package ifconfig

解决办法

• 出现以上问题的原因是没有安装 net-tools工具；
• 执行 apt-get install net-tools 之后即可使用ifconfig命令（已在root环境下，不需要在命令前加sudo）

root@c83011ff7528:/# ifconfig
eth0      Link encap:Ethernet  HWaddr 02:42:ac:11:00:02
          inet addr:172.17.0.5  Bcast:172.17.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3535 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2697 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:4692046 (4.6 MB)  TX bytes:148692 (148.6 KB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)