HOWTO: Find out network configuration

1) IP address, MAC address and netmask

    /sbin/ifconfig

    ip arr show  // on Arch Linux

    cat /sys/class/net/device_name/address  // on Arch Linux

2) DNS server, hosts file and DNS look up order

    cat /etc/resolve.conf
    cat /etc/hosts

3) Gateway

    ip route show

4) Hostname

    cat /etc/sysconfig/network

HOWTO: Setup direct LAN between two Linux computers

1) Execute on first computer as root

    ifconfig eth0 up
    ifconfig eth0 inet 192.168.0.1 netmask 255.255.255.0 arp

2) Execute on second computer as root

    ifconfig eth0 up
    ifconfig eth0 inet 192.168.0.2 netmask 255.255.255.0 arp

3) If necessary update routing table on both computers

    route add -net 192.168.0.0 netmask 255.255.255.0 dev eth0
    route add -net 192.168.0.0 netmask 255.255.255.0 dev eth0