How to rename an Ethernet interface?
Solution 1
It is possible. Please do:
gksudo gedit /etc/udev/rules.d/70-persistent-net.rules
Swap eth0 and eth1. Proofread carefully, save and close gedit. Use any other text editor if you don't have gedit. Reboot immediately and you should be all set.
Solution 2
This renames em1 to eth0 for me on Ubuntu 14.04:
# Note: replace xx:xx... in the rule with the MAC address of your Nic>
$ sudo vim /etc/udev/rules.d/75-persistent-net-generator.rules
SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="xx:xx:xx:xx:xx:xx", NAME="eth0"
# Change "em1" to "eth0" in your interfaces file.
$ sudo vim /etc/network/interfaces
$ sudo reboot
Credit: Billf's answer here: https://bbs.archlinux.org/viewtopic.php?id=156375
FYI, this was what I was originally seeing in logs:
$ sudo grep eth0 /var/log/dmesg
[ 2.976463] e1000e 0000:00:19.0 eth0: registered PHC clock
[ 3.003714] e1000e 0000:00:19.0 eth0: (PCI Express:2.5GT/s:Width x1) 18:03:73:e9:f2:36
[ 3.031177] e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection
[ 3.058399] e1000e 0000:00:19.0 eth0: MAC: 10, PHY: 11, PBA No: E041FF-0FF
[ 3.153759] systemd-udevd[167]: renamed network interface eth0 to em1
Looks like systemd-udevd was doing negative work and renaming eth0 to em1 in the first place. Not sure how to stop it from doing that, but renaming back to eth0 seems to work.
For the enthusiast who wants to know more... http://linux.dell.com/files/whitepapers/consistent_network_device_naming_in_linux.pdf
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Ivan
Updated on September 18, 2022Comments
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Ivan over 1 year
As my built-in NIC was not supported by Ubuntu out-of-the-box I was forced to use a USB NIC for temporary installation-time Internet connection.
And the USB NIC has taken the
eth0
name making the built-in NIC to becomeeth1
.Sure, this doesn't really matter but just for the system "prettiness" I would like
eth1
to becomeeth0
letting any newly attached NIC to becomeeth1
.Is this possible?
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Rinzwind over 11 years... and first make a backup of the file
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sjas over 9 yearsThank you so very, very much for this. All other's seem to miss the point.
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Kim Doe almost 8 yearsJust for the record: this is correct for 14.04, but 70-persistent-net.rules no longer exists as of Ubuntu 15.10. See askubuntu.com/questions/689501 for a solution that works for Ubuntu 15.10, 16.04, and later.
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Kim Doe almost 8 yearswell, it might be correct for 14.04. There's been a bit of flux in this area in recent releases.
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chili555 almost 8 yearsYou are correct. When this was posted in 2012, it was the correct procedure. This procedure, as well as many other things, has changed in 15.10 et seq.
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jno over 7 yearsDoesn't work. And shouldn't, AFAIU.
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Kendrick over 6 yearsDoes not work. just tested with 16.04 lts
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Patrizio Bertoni almost 4 yearsAs of 18.04, file is named
76-netnames.rules