在CentOS 7 mini版中使用ifconfig

衆所周知，「ifconfig」命令用於配置GNU/Linux系統的網絡接口。它顯示網絡接口卡的詳細信息，包括IP地址，MAC地址，以及網絡接口卡狀態之類。可是，該命令已通過時了，並且在最小化版本的RHEL 7以及它的克隆版本CentOS 7，Oracle Linux 7和Scientific Linux 7中也找不到該命令。那麼問題來了，怎麼在Centos7中查看ip信息呢？怎麼操做才能找回之前的習慣呢？

7版系統查看網絡信息的命令

CentOS 7最小化系統，使用「ip addr」和「ip link」命令來查找網卡詳情。要知道統計數據，能夠使用「ip -s link」。

要查看網卡細節：ip addr

[root@linuxprobe ~]#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: venet0: <BROADCAST,POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN 
    link/void 
    inet 127.0.0.1/32 scope host venet0
    inet 192.168.1.101/32 brd 192.168.1.101 scope global venet0:0

要查看網絡接口統計數據：ip link

[root@linuxprobe ~]#ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN mode DEFAULT 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: venet0: <BROADCAST,POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT 
    link/void

或者使用：ip -s link

[root@linuxprobe ~]#ip -s link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN mode DEFAULT 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    RX: bytes  packets  errors  dropped overrun mcast   
    0          0        0       0       0       0      
    TX: bytes  packets  errors  dropped carrier collsns 
    0          0        0       0       0       0      
2: venet0: <BROADCAST,POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT 
    link/void 
    RX: bytes  packets  errors  dropped overrun mcast   
    8515667    6667     0       0       0       0      
    TX: bytes  packets  errors  dropped carrier collsns 
    300403     4249     0       0       0       0

在CentOS 7最小化服務器版本中啓用「ifconfig」命令

若是你不知道在哪裏能夠找到ifconfig命令，請按照如下簡單的步驟來找到它。

首先，讓咱們找出哪一個包提供了ifconfig命令:

[root@linuxprobe ~]# yum provides ifconfig
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.aol.in
 * extras: centos.aol.in
 * updates: centos.aol.in
net-tools-2.0-0.17.20131004git.el7.x86_64 : Basic networking tools
Repo        : @base
Matched from:
Filename    : /usr/sbin/ifconfig

或者你也能夠使用如下命令

yum whatprovides ifconfig

這裏，「provides」或者「whatprovides」開關用於找出某個包提供了某些功能或文件。

net-tools包提供了ifconfig命令。所以，安裝net-tools包也能夠使用ifconfig命令。

安裝net-tools包

yum install net-tools

如今，你就能夠像以往同樣使用ifconfig命令了。

[root@linuxprobe ~]# ifconfig -a
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 16436
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        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

venet0: flags=211<UP,BROADCAST,POINTOPOINT,RUNNING,NOARP>  mtu 1500
        inet 127.0.0.1  netmask 255.255.255.255  broadcast 0.0.0.0  destination 127.0.0.1
        unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 0  (UNSPEC)
        RX packets 7073  bytes 8549159 (8.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 4611  bytes 359201 (350.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

venet0:0: flags=211<UP,BROADCAST,POINTOPOINT,RUNNING,NOARP>  mtu 1500
        inet 192.168.1.101  netmask 255.255.255.255  broadcast 192.168.1.101  destination 192.168.1.101
        unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 0  (UNSPEC)

盡情享受吧！

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