| # hostname wb.example.com.cn # hostname wb.example.com.cn | 
| # ifconfig xl0 inet 192.168.1.64 netmask 255.255.255.0 up | 
| # ifconfig xl0 192.168.1.64 | 
| # ifconfig xl0 down | 
| # ifconfig xl0 192.168.100.100 alias # ifconfig xl0 delete 192.168.100.100 | 
| # ifconfig -a xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 inet 192.168.1.64 netmask 0xffffff00 broadcast 192.168.1.255 ether 00:90:27:4e:f6:67 media: autoselect supported media: autoselect 100baseTX <full-duplex> 100baseTX 10baseT/UTP <full -duplex> 10baseT/UTP lp0: flags=8810<POINTOPOINT,SIMPLEX,MULTICAST> mtu 1500 tun0: flags=8050<POINTOPOINT,RUNNING,MULTICAST> mtu 1500 sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 552 ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500 lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 inet 127.0.0.1 netmask 0xff000000 | 
| # ifconfig tun0 inet 10.10.1.42 10.10.1.29 | 
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