众所周知，“ifconfig”命令用于配置GNU/Linux系统的网络接口。它显示网络接口卡的详细信息，包括IP地址，MAC地址，以及网络接口卡状态之类。但是，该命令已经由时了，而且在最小化版本的RHEL 7以及它的克隆版本CentOS 7，Oracle Linux 7和Scientific Linux 7中也找不到该命令。那么问题来了，怎么在Centos7中查看ip信息呢？怎么操作才能找回以前的习气呢？
7版系统查看网络信息的命令
CentOS 7最小化系统，利用“ip addr”和“ip link”命令来查找网卡详情。要知道统计数据，可以利用“ip -s link”。
要查看网卡细节：ip addr
[root@linuxprobe ~]#ip addr1: 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 forever2: 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
要查看网络接口统计数据：ip link
[root@linuxprobe ~]#ip link1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN mode DEFAULT link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:002: venet0: <BROADCAST,POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT link/void
或者利用：ip -s link
[root@linuxprobe ~]#ip -s link1: 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最小化做事器版本中启用“ifconfig”命令
如果你不知道在哪里可以找到ifconfig命令，请按照以下大略的步骤来找到它。
首先，让我们找出哪个包供应了ifconfig命令:
[root@linuxprobe ~]# yum provides ifconfigLoaded plugins: fastestmirrorLoading mirror speeds from cached hostfile base: centos.aol.in extras: centos.aol.in updates: centos.aol.innet-tools-2.0-0.17.20131004git.el7.x86_64 : Basic networking toolsRepo : @baseMatched from:Filename : /usr/sbin/ifconfig
或者你也可以利用以下命令
yum whatprovides ifconfig
这里，“provides”或者“whatprovides”开关用于找出某个包供应了某些功能或文件。
net-tools包供应了ifconfig命令。因此，安装net-tools包也可以利用ifconfig命令。
安装net-tools包
yum install net-tools
现在，你就可以像以往一样利用ifconfig命令了。
[root@linuxprobe ~]# ifconfig -alo: 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 0venet0: 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 0venet0:0: 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)
尽情享受吧！
via: http://www.unixmen.com/ifconfig-command-found-centos-7-minimal-installation-quick-tip-fix/
作者：Senthilkumar 译者：GOLinux 校正：Caroline
本文由 LCTT 原创翻译，Linux中国 名誉推出
原文来自：https://linux.cn/article-3631-1.html
本文地址：https://www.linuxprobe.com/centos-7-use-ifconfig.html编辑员：陶武杰，审核员：冯振华
本文原创地址：https://www.linuxprobe.com/centos-7-use-ifconfig.html
