$ scutil --nwi
Network information
IPv4 network interface information
en8 : flags : 0x5 (IPv4,DNS)
address : 10.1.1.1
reach : 0x00000002 (Reachable)
en0 : flags : 0x5 (IPv4,DNS)
address : 192.168.6.55
reach : 0x00000002 (Reachable)
REACH : flags 0x00000002 (Reachable)
IPv6 network interface information
No IPv6 states found
REACH : flags 0x00000000 (Not Reachable)
Network interfaces: en8 en0
get interface
[!NOTE|label:references:]
# default route
$ ip route get $(dig +short github.com | head -1) | sed -rn 's|.*dev\s+(\S+)\s+src.*$|\1|p')
# or
$ ip route get $(nslookup "${githubIp}" | grep Server | awk -F' ' '{print $NF}') | sed -rn 's|.*dev\s+(\S+)\s+src.*$|\1|p'
en8
# all active interface
$ netstat -nr | grep -E 'UG|UGSc' | grep -E '^0.0.0|default' | grep -E '[0-9.]{7,15}' | awk '{print $NF}'
en0
en8
# osx 15.0
$ netstat -nr | command grep -E '^0.0.0|^default|UG|UGScg' | awk '$2 ~ /([0-9]{1,3}\.){3}[0-9]{1,3}/' | awk '{print $NF}'
en8
en0
$ networksetup -listnetworkserviceorder | grep --color=none 'Hardware Port' | awk -F'(, )|(: )|[)]' '{print $2, "~>", $4}'
USB 10/100/1000 LAN ~> en8
Wi-Fi ~> en0
Thunderbolt Bridge ~> bridge0
get default interface
$ ip route get 1.1.1.1 | sed -n -re 's/.+via.+dev ([0-9a-zA-Z]+) src.+$/\1/p'
en8
list all interfaces
$ /sbin/ifconfig | grep --color=none flags=8863 | grep -v bridge
en5: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
llw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
en8: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
# or
$ scutil --nwi | awk -F': ' '/Network interfaces/ {print $2;exit;}'
en8 en0
get ip address
$ ipAddr=$(/usr/local/bin/ip a s "${interface}" | sed -rn 's|\W*inet[^6]\W*([0-9\.]{7,15}).*$|\1|p')
# or via `/sbin/ifconfig`
$ ipAddr=$(/sbin/ifconfig "${interface}" | sed -rn 's|^\s+inet\s+([0-9\.]+))
get mac address
$ ip link show ${interface} | sed -rn 's|.*ether ([0-9a-fA-F:]{17}).*$|\1|p' | sed 's|:||g' | tr [a-z] [A-Z]
get interface information
#!/bin/bash
while read -r line; do
sname=$(echo "$line" | awk -F "(, )|(: )|[)]" '{print $2}')
sdev=$(echo "$line" | awk -F "(, )|(: )|[)]" '{print $4}')
# echo "Current service: $sname, $sdev, $currentservice"
if [ -n "$sdev" ]; then
ifout="$(/sbin/ifconfig "$sdev" 2>/dev/null)"
echo "$ifout" | grep 'status: active' > /dev/null 2>&1
rc="$?"
if [ "$rc" -eq 0 ]; then
currentservice="$sname"
currentdevice="$sdev"
currentip=$(echo "${ifout}" | sed -rn 's|^\s+inet\s+([0-9\.]+).*$|\1|p')
currentmac=$(echo "$ifout" | awk '/ether/{print $2}')
# may have multiple active devices, so echo it here
echo "$currentservice, $currentdevice, $currentmac, ${currentip}"
fi
fi
done <<< "$(networksetup -listnetworkserviceorder | grep --color=none 'Hardware Port')"
find local device ip address
$ arp -a
networksetup
show network information
$ networksetup -listnetworkserviceorder
An asterisk (*) denotes that a network service is disabled.
(1) USB 10/100/1000 LAN
(Hardware Port: USB 10/100/1000 LAN, Device: en7)
(2) Wi-Fi
(Hardware Port: Wi-Fi, Device: en0)
...
# or
$ networksetup -listallnetworkservices
An asterisk (*) denotes that a network service is disabled.
USB 10/100/1000 LAN
Wi-Fi
Bluetooth PAN
Thunderbolt Bridge
# check wifi status
$ system_profiler SPAirPortDataType | awk -F: '/Status:/{print $2}'
Connected
# or
$ networksetup -getairportpower en0
Wi-Fi Power (en0): On
# or
$ networksetup -getairportpower $(networksetup -listallhardwareports | awk -F: '/Wi-Fi/{getline; print $2;}')
Wi-Fi Power (en0): On
# turn on
$ networksetup -setairportpower en0 on
$ networksetup -getairportpower en0
Wi-Fi Power (en0): On
# turn off
$ networksetup -setairportpower en0 off
$ networksetup -getairportpower en0
Wi-Fi Power (en0): Off
scan available wifi network
$ networksetup -setairportpower en0 on
# not available anymore
$ sudo /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -s
SSID BSSID RSSI CHANNEL HT CC SECURITY (auth/unicast/group)
Customer **:**:**:**:**:** -75 11 N CN WEP
CorpWLAN **:**:**:**:**:** -72 1 Y CN WPA2(802.1x,Unrecognized(0)/AES/AES)
Guest **:**:**:**:**:** -71 1 Y CN NONE
disable ipv6
$ networksetup -listallnetworkservices
An asterisk (*) denotes that a network service is disabled.
USB 10/100/1000 LAN
Wi-Fi
Bluetooth PAN
Thunderbolt Bridge
# disable
$ networksetup -setv6off 'USB 10/100/1000 LAN'
$ networksetup -setv6off Wi-fi
# undo
$ networksetup -setv6automatic 'USB 10/100/1000 LAN'
$ networksetup -setv6automatic Wi-Fi
$ networksetup -listpreferredwirelessnetworks en0
# older version
$ defaults read /Library/Preferences/SystemConfiguration/com.apple.airport.preferences \
| grep LastConnected -A 7
