1. 使用ping命令
$ 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
2. 使用nmap
[root@localhost temp]# nmap -sP 192.168.1.0/24
Starting Nmap 5.51 ( http://nmap.org ) at 2013-12-24 22:45 CST
Nmap scan report for 192.168.1.100
Host is up (0.037s latency).
MAC Address: C4:6A:B7:8A:1B:AF (Unknown)
Nmap scan report for 192.168.1.105
Host is up.
Nmap scan report for 192.168.1.106
Host is up (0.075s latency).
MAC Address: 00:08:CA:2C:60:82 (TwinHan Technology Co.)
Nmap scan report for 192.168.1.253
Host is up (0.0024s latency).
MAC Address: 38:83:45:9B:A6:92 (Unknown)
Nmap done: 256 IP addresses (4 hosts up) scanned in 7.53 seconds