/lib/udev/rules.d/49-teensy.rules is in teensy-loader-cli 2.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | # UDEV Rules for Teensy boards, http://www.pjrc.com/teensy/
#
# The latest version of this file may be found at:
# http://www.pjrc.com/teensy/49-teensy.rules
#
# This file must be placed at:
#
# /etc/udev/rules.d/49-teensy.rules (preferred location)
# or
# /lib/udev/rules.d/49-teensy.rules (req'd on some broken systems)
#
# To install, type this command in a terminal:
# sudo cp 49-teensy.rules /etc/udev/rules.d/49-teensy.rules
#
# Or use the alternate way (from this forum message) to download and install:
# https://forum.pjrc.com/threads/45595?p=150445&viewfull=1#post150445
#
# After this file is installed, physically unplug and reconnect Teensy.
#
ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04[789B]?", ENV{ID_MM_DEVICE_IGNORE}="1"
ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04[789A]?", ENV{MTP_NO_PROBE}="1"
SUBSYSTEMS=="usb", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04[789ABCD]?", TAG+="uaccess", TAG+="udev-acl"
KERNEL=="ttyACM*", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04[789B]?", TAG+="uaccess", TAG+="udev-acl"
#
# If you share your linux system with other users, or just don't like the
# idea of write permission for everybody, you can replace MODE:="0666" with
# OWNER:="yourusername" to create the device owned by you, or with
# GROUP:="somegroupname" and mange access using standard unix groups.
#
#
# If using USB Serial you get a new device each time (Ubuntu 9.10)
# eg: /dev/ttyACM0, ttyACM1, ttyACM2, ttyACM3, ttyACM4, etc
# apt-get remove --purge modemmanager (reboot may be necessary)
#
# Older modem proding (eg, Ubuntu 9.04) caused very slow serial device detection.
# To fix, add this near top of /lib/udev/rules.d/77-nm-probe-modem-capabilities.rules
# SUBSYSTEMS=="usb", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04[789]?", GOTO="nm_modem_probe_end"
#
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