Find out active IPs in a Linux LAN

If you are on a LAN and wish to find out which computers in it currently have access to that certain LAN, you can use the following command:

    for ip in $(seq 1 254); do ping -c 1 192.168.1.$ip>/dev/null; [ $? -eq 0 ] && echo “192.168.1.$ip UP” || : ; done