More checking... on Trusty, the file is generated by
/lib/udev/write_net_rules:
bladernr@sulaco:~$ cat /etc/udev/rules.d/70-persistent-net.rules
# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
And checking my Xenial system (one of them) write_net_rules does not exist:
bladernr@galactica:/etc/udev/rules.d$ ls /lib/udev
ata_id hplj1000 hpljP1008 iphone-set-info scsi_id
cdrom_id hplj1005 hpljP1505 ipod-set-info
udev-add-printer
collect hplj1018 hpljP1505n mtd_probe
udev-configure-printer
console-setup-tty hplj1020 hwclock-set mtp-probe
usb_modeswitch
hdparm hpljP1005 hwdb.bin pcmcia-check-broken-cis v4l_id
hid2hci hpljP1006 hwdb.d pcmcia-socket-startup
hotplug.functions hpljP1007 ifupdown-hotplug rules.d
Now, comparing the packages installed in the two that include udev in the name:
Trusty:
bladernr@sulaco:~$ dpkg -l |grep udev|awk '{print $2 " " $3}'
gir1.2-gudev-1.0 1:204-5ubuntu20.15
libgudev-1.0-0:amd64 1:204-5ubuntu20.15
libgudev-1.0-0:i386 1:175-0ubuntu9
libudev0:amd64 175-0ubuntu13
libudev0:i386 175-0ubuntu13
libudev1:amd64 204-5ubuntu20.15
libudev1:i386 204-5ubuntu20.15
python3-pyudev 0.16.1-2build1
system-config-printer-udev 1.4.3+20140219-0ubuntu2.6
udev 204-5ubuntu20.15
Xenial:
bladernr@galactica:/etc/udev/rules.d$ dpkg -l |grep udev |awk '{print $2 " "
$3}'
gir1.2-gudev-1.0:amd64 1:230-2
libgudev-1.0-0:amd64 1:230-2
libudev1:amd64 228-6ubuntu1
system-config-printer-udev 1.5.7+20150819-0ubuntu5
udev 228-6ubuntu1
the manpage for udev in Xenial says:
RULES FILES
The udev rules are read from the files located in the system rules
directory
/lib/udev/rules.d, the volatile runtime directory /run/udev/rules.d and
the local
administration directory /etc/udev/rules.d. All rules files are
collectively sorted and
SO looking at /lib/udev/rules.d for Trusty:
bladernr@sulaco:~$ ls /lib/udev/rules.d/ |grep net
40-bridge-network-interface.rules
40-vlan-network-interface.rules
75-net-description.rules
75-persistent-net-generator.rules
77-mm-huawei-net-port-types.rules
and Xenial:
bladernr@galactica:/etc/udev/rules.d$ ls /lib/udev/rules.d/ |grep net
75-net-description.rules
77-mm-huawei-net-port-types.rules
80-net-setup-link.rules
Xenial is missing one. If this is intentional, how does one go about
setting persistent network names?
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https://bugs.launchpad.net/bugs/1544747
Title:
No udev persistent rules in Xenial = strange device names for NICs
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