I have to install Matlab on a Fedora 20 machine and I need to rename the network device to eth0, or else Matlab won't install. This is a known issue:
http://www.mathworks.com/matlabcentral/answers/100235-why-can-t-i-activate-m...
So, to revert to eth0, I follow these instructions:
http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterface...
It says I have 4 options. I did ALL of them and still
[root@phoenix ~]# /sbin/ifconfig em1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.1.40 netmask 255.255.255.0 broadcast 192.168.1.255 inet6 fe80::20c:f1ff:febc:29fe prefixlen 64 scopeid 0x20<link> ether 00:0c:f1:bc:29:fe txqueuelen 1000 (Ethernet) RX packets 713 bytes 306565 (299.3 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 979 bytes 131054 (127.9 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
etc.
Specifically, I have masked /usr/lib/udev/rules.d/80-net-name-slot.rules by creating a link /etc/udev/rules.d/80-net-name-slot.rules -> /dev/null.
[root@phoenix ~]# ls -l /etc/udev/rules.d/ total 8 -rw-r--r--. 1 root root 151 Jul 6 20:31 70-persistent-net.rules lrwxrwxrwx. 1 root root 9 Jul 20 10:36 80-net-name-slot.rules -> /dev/null -rw-r--r--. 1 root root 352 Apr 3 04:36 98-kexec.rules
I also have an /etc/udev/rules.d/70-persistent-net.rules:
[root@phoenix ~]# cat /etc/udev/rules.d/70-persistent-net.rules SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:f1:bc:29:fe", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
I also passed net.ifnames=0 to the kernel upon boot:
[root@phoenix ~]# dmesg | grep ifnames [ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-3.15.6-200.fc20.i686+PAE root=UUID=aa696c85-f1d4-4bf3-9a93-b011ec8e9a6a ro vconsole.font=latarcyrheb-sun16 rhgb quiet net.ifnames=0 LANG=en_US.UTF-8
Someone must have figured this out. Can anybody please help me solve this?
Also, NetworkManager might have something to do with this, because if I right-click the NW applet -> Edit Connections, I do have a connection named eth0, but if I try to edit that, the device MAC address is
00:0c:f1:bc:29:fe (em1)
So NW somehow likes em1, despite all my efforts. If I stop and disable NW, then the network does not even start upon boot, as it should. How do I tell NW to leave my network alone and still have the network start upon boot?
Thanks!