Find device by name in .local network, connect via ssh

connect.sh

# This script finds a device in local network by its name (using "devicename.local"), and
# then connects to it via ssh. Default device is "rainbow", other device name can be 
# passed as a parameter.


# USAGE: ./connect.sh [machine_name]


#!/bin/sh

# input machine name, or use default:
TARGET="$1"
if [ "$TARGET" = "" ] ; then
    TARGET="rainbow"
fi

# find IP of target device:
CONNECTION="$(arp $TARGET.local)"

# Clean IP from non useful data:
IP_RAW="$(echo "$CONNECTION" | grep -E "([0-9]{1,3}[\.]){3}[0-9]{1,3}" | awk '{print $2}')" 
# Remove parentheses from IP address:
IP="$(echo "$IP_RAW" | tr -d '()')"

# connect to device via ssh:
ssh $TARGET@$IP