chadmayfield · June 3, 2019 19:36 · Jun 3, 2019 · Jun 3, 2019 · Jun 3, 2019 · Jun 3, 2019
diff --git a/network_interface_notes.md b/network_interface_notes.md
@@ -2,6 +2,14 @@
 
 Beginning in Systemd v197, network interfaces assigned by systemd/udev are "predicatble";
 
+Names are now based on;
+* Index numbers for on-board devices (eno1)
+* PCI-ehotplug slot index numbers (ens1)
+* Physical/geographical location of hardware connector (enp2s0)
+* MAC address (enx78e7d1ea46da)
+* Classic, unpredictable kernel-native naming (eth0)
+
+Links;
 * [Predicatable Network Interface names](https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/)
 * [udev-builtin-net_id.c @ freedesktop.org](https://cgit.freedesktop.org/systemd/systemd/tree/src/udev/udev-builtin-net_id.c)
 * [udev-builtin-net_id.c @ github.com/systemd](https://github.com/systemd/systemd/blob/master/src/udev/udev-builtin-net_id.c#L12)

diff --git a/network_interface_notes.md b/network_interface_notes.md
@@ -18,7 +18,7 @@ Two character prefixes based on the type of interface:
 
  #### Find network interface
 ````
-ls /sys/class/net | grep -E "^e(m|n(o|p|s)|th[0-9])|wl(an|p)"
+ls /sys/class/net | grep -E "^e(m|n(o|p|s)|th)[0-9]|wl(an|p)"
 find /sys/class/net ! -type d | xargs --max-args=1 realpath  | awk -F\/ '/pci/{print $NF}'
 ````
 

diff --git a/network_interface_notes.md b/network_interface_notes.md
@@ -17,16 +17,20 @@ Two character prefixes based on the type of interface:
  [SO Answer: Find available network interfaces](https://unix.stackexchange.com/a/125401)
 
  #### Find network interface
-`ls /sys/class/net | grep -E "^e(m|n(o|p|s)|th[0-9])|wl(an|p)"
-find /sys/class/net ! -type d | xargs --max-args=1 realpath  | awk -F\/ '/pci/{print $NF}'`
+````
+ls /sys/class/net | grep -E "^e(m|n(o|p|s)|th[0-9])|wl(an|p)"
+find /sys/class/net ! -type d | xargs --max-args=1 realpath  | awk -F\/ '/pci/{print $NF}'
+````
 
 #### Find available network interfaces
-`ip r | grep " src "|cut -d " " -f 3,12 | xargs
+````
+ip r | grep " src "|cut -d " " -f 3,12 | xargs
 ip addr show | awk '/inet.*brd/{print $NF}'
 ip -o link show up | awk -F': ' '{print $2}'
 ip -o -4 addr show
 ip -o link ls up
-lshw -class network`
+lshw -class network
+````
 
 #### Observed Interface Names
 ````

diff --git a/network_interface_notes.md b/network_interface_notes.md
@@ -29,7 +29,8 @@ ip -o link ls up
 lshw -class network`
 
 #### Observed Interface Names
-`em1
+````
+em1
 eno1
 enp0s31f6
 enp0s29u1u2
@@ -48,4 +49,5 @@ wlp3s0
 wlp3s0b1
 wlp19s0
 
-wwp0s29u1u4i6`
+wwp0s29u1u4i6
+````
diff --git a/network_interface_notes.md b/network_interface_notes.md
@@ -1,8 +1,10 @@
 # Network Interface Notes
 
-https://cgit.freedesktop.org/systemd/systemd/tree/src/udev/udev-builtin-net_id.c
-https://github.com/systemd/systemd/blob/master/src/udev/udev-builtin-net_id.c#L12
-https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/
+Beginning in Systemd v197, network interfaces assigned by systemd/udev are "predicatble";
+
+* [Predicatable Network Interface names](https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/)
+* [udev-builtin-net_id.c @ freedesktop.org](https://cgit.freedesktop.org/systemd/systemd/tree/src/udev/udev-builtin-net_id.c)
+* [udev-builtin-net_id.c @ github.com/systemd](https://github.com/systemd/systemd/blob/master/src/udev/udev-builtin-net_id.c#L12)
 
 ````
 Two character prefixes based on the type of interface:

diff --git a/network_interface_notes.md b/network_interface_notes.md
@@ -0,0 +1,49 @@
+# Network Interface Notes
+
+https://cgit.freedesktop.org/systemd/systemd/tree/src/udev/udev-builtin-net_id.c
+https://github.com/systemd/systemd/blob/master/src/udev/udev-builtin-net_id.c#L12
+https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/
+
+````
+Two character prefixes based on the type of interface:
+ *   en -- ethernet
+ *   sl -- serial line IP (slip)
+ *   wl -- wlan
+ *   ww -- wwan
+ ````
+
+ [SO Answer: Find available network interfaces](https://unix.stackexchange.com/a/125401)
+
+ #### Find network interface
+`ls /sys/class/net | grep -E "^e(m|n(o|p|s)|th[0-9])|wl(an|p)"
+find /sys/class/net ! -type d | xargs --max-args=1 realpath  | awk -F\/ '/pci/{print $NF}'`
+
+#### Find available network interfaces
+`ip r | grep " src "|cut -d " " -f 3,12 | xargs
+ip addr show | awk '/inet.*brd/{print $NF}'
+ip -o link show up | awk -F': ' '{print $2}'
+ip -o -4 addr show
+ip -o link ls up
+lshw -class network`
+
+#### Observed Interface Names
+`em1
+eno1
+enp0s31f6
+enp0s29u1u2
+enp2s0
+enp2s0f1
+enp5s0
+enp7s0
+ens1
+enx78e7d1ea46da
+eth0
+p7p1
+
+wlan0
+wlp0s12f0
+wlp3s0
+wlp3s0b1
+wlp19s0
+
+wwp0s29u1u4i6`