CrunchBang Linux

#!/usr/bin/python
# Quick and dirty script to output hosts ip via nmap by ikex <ikex@orioncode.org>

# change this to change you output! :)
nohost = "(No Hostname)"
output = "%s %s Appears to be up!" # IP, Hostname
nip= "10.1.1.0/24"

import os, socket, types
fp = os.popen("nmap -sP %s" % nip)
dat=fp.read()
dat=dat.split('\n')
for line in dat:
    try: dummy = int(line[5:6])
    except (ValueError): continue
    if line[:4] == "Host":
        ip=line.split(' ')[1]
        try:
            host="("+socket.gethostbyaddr(ip)[0]+")"
        except:
            host=nohost
        print output % (ip, host)

ikex@ikebox ~
$ scanup.py
10.1.1.2 (mpeters-PC) Appears to be up!
10.1.1.3 (No Hostname) Appears to be up!
10.1.1.4 (tnew-PC) Appears to be up!
10.1.1.6 (No Hostname) Appears to be up!
10.1.1.7 (ikebox) Appears to be up!