Get ip addresses for each interface in linux with bash function.

display_interface_ip

declare -rx IFC='/sbin/ifconfig'

showips() {

NAMES=( $($IFC | egrep 'lo|eth|wlan|en' -A 1 | awk -F' ' '{print $1 }' | egrep -v 'inet|-|UP|RX|collisions' | sort -u) )

for i in "${NAMES[@]}"; do
   echo "$i has ip address: $($IFC | grep $i -A 1 | grep 'addr' | awk -F' ' '{print $2}' | awk -F':' '{print $2}')"
done
}

# alternative to above
# hmm ... more testing ... 
for i in {0..9}; do
  ip addr list eth${i} | grep 'inet ' | tr -s ' ' | cut -d ' ' -f 3 | cut -d '/' -f 1)
done