ifconfig is a system administration utility in Unix-like operating systems to configure, control, and query TCP/IP network interface parameters from a command line interface (CLI) or in system configuration scripts.

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4answers
15k views

Should I quit using Ifconfig?

With the servers that mount Infiniband cards, when I use the ifconfig command, I get this warning: Ifconfig uses the ioctl access method to get the full address information, which limits hardware ...
3
votes
1answer
986 views

How to add a broadcast address to loopback with ifconfig on a OS/X?

I am trying to use ifconfig to turn on broadcast on my loopback interface. It currently reads: lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 As you can see, no broadcast address! ...
2
votes
2answers
4k views

Fedora 17 ifconfig eth0 returns an error message, why did linux change eth0 to em1?

I have a fresh install of Fedora 17 installed, 64 bit. Everything works flawlessly, It connects to the internet automatically when I plug in the internet cable. So I'm kind of confused when I ...
3
votes
6answers
2k views

BASH script that tests for IP

Is there an elegant way to test an IP address in a BASH script? I could do ifconfig and narrow down the IP using sed/awk, but I think there is a simpler solution. My application is basically using ...
2
votes
3answers
2k views

Privileges for ifconfig

In order to do ifconfig in Linux and change the IP and VIP does it require root privileges? Or it is also possible to do this via a non-root account?
0
votes
2answers
4k views

Sub-interface already in use on another host - brand new interface

I created a sub-interface on a RHEL box, eth0:1, and copied the eth0 config and changed all the settings to reflect eth0:1 and the IP address. However, when I issue ifup eth0:1 I receive this error: ...
0
votes
1answer
2k views

openvpn: after changing to server mode, client does not create TUN device

i had a previously working configuration with the config files used in a previous question However, i've changed this now to the following configuration using server mode, everything on the logs seem ...
-2
votes
1answer
776 views

How to make a tun interface with ifconfig in OSX? [closed]

If I try to do this I get the following: bash-3.2# ifconfig tun0 10.140.1.40 ifconfig: ioctl (SIOCAIFADDR): Destination address required It sounds like this doesn't happen in Linux (probably this ...