ifconfig eth0 显示一个以太网卡的配置

　　ifup eth0 启用一个 'eth0' 网络设备

　　ifdown eth0 禁用一个 'eth0' 网络设备

　　ifconfig eth0 192.168.1.1 netmask 255.255.255.0 控制IP地址

　　ifconfig eth0 promisc 设置 'eth0' 成混杂模式以嗅探数据包 (sniffing)

　　dhclient eth0 以dhcp模式启用 'eth0'

　　route -n show routing table

　　route add -net 0/0 gw IP_Gateway configura default gateway

　　route add -net 192.168.0.0 netmask 255.255.0.0 gw 192.168.1.1 configure static route to reach network '192.168.0.0/16'

　　route del 0/0 gw IP_gateway remove static route

　　echo "1" > /proc/sys/net/ipv4/ip_forward activate ip routing

　　hostname show hostname of system

　　host www.example.com lookup hostname to resolve name to ip address and viceversa(1)

　　nslookup www.example.com lookup hostname to resolve name to ip address and viceversa(2)

　　ip link show show link status of all interfaces

　　mii-tool eth0 show link status of 'eth0'

　　ethtool eth0 show statistics of network card 'eth0'

　　netstat -tup show all active network connections and their PID

　　netstat -tupl show all network services listening on the system and their PID

　　tcpdump tcp port 80 show all HTTP traffic

　　iwlist scan show wireless networks

　　iwconfig eth1 show configuration of a wireless network card

　　hostname show hostname

　　host www.example.com lookup hostname to resolve name to ip address and viceversa

　　nslookup www.example.com lookup hostname to resolve name to ip address and viceversa

　　whois www.example.com lookup on Whois database

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　　Microsoft Windows networks (SAMBA)

　　nbtscan ip_addr netbios name resolution

　　nmblookup -A ip_addr netbios name resolution

　　smbclient -L ip_addr/hostname show remote shares of a windows host

　　smbget -Rr smb://ip_addr/share like wget can download files from a host windows via smb

　　mount -t smbfs -o username=user,password=pass //WinClient/share /mnt/share mount a windows network share