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ubuntu ifconfig没有ip

100人浏览   2024-12-17 09:36:57 


$ ifconfig -a
ens33: flags=4098<BROADCAST,MULTICAST>  mtu 1500
    ether 00:**:**:**:**:**  txqueuelen 1000  (Ethernet)
    RX packets 0  bytes 0 (0.0 B)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 0  bytes 0 (0.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
    inet 127.0.0.1  netmask 255.0.0.0
    inet6 ::1  prefixlen 128  scopeid 0x10<host>
    loop  txqueuelen 1000  (Local Loopback)
    RX packets 1876  bytes 114200 (114.2 KB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 1876  bytes 114200 (114.2 KB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

问题

Looks to me like the interface is disabled:

$ ifconfig -a
ens33: flags=4098<BROADCAST,MULTICAST>  mtu 1500
    ether 00:**:**:**:**:**  txqueuelen 1000  (Ethernet)
    RX packets 0  bytes 0 (0.0 B)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 0  bytes 0 (0.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
    inet 127.0.0.1  netmask 255.0.0.0
    inet6 ::1  prefixlen 128  scopeid 0x10<host>
    loop  txqueuelen 1000  (Local Loopback)
    RX packets 1876  bytes 114200 (114.2 KB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 1876  bytes 114200 (114.2 KB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

But ifup doesn't seem to know ens33 (or eth0):

$ ifup ens33
Unknown interface ens33
$ ifup eth0
Unknown interface eth0

解决方案

Add the following line to /etc/network/interfaces:

iface ens33 inet dhcp

Switch it on (enable it):

sudo ifup ens33

Good to go:

ping google.com

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