Duplicate network configuration

My admin is very busy and since my computer is 32bits, the last Ubuntu update broke the Xorg startup.

As far as I understood, if I reinstall the computer from scratch, I only need to duplicate the network configuration for the router not to notice any difference. For this I would need 4 linux commands:

1. ifconfig device ipaddress netmask nmask broadcast bcast
2. ifup device (optional)
3. route add -net ipaddress netmask nmask gw gway dev device
   
4. sysctl kernel.hostname=OLD-HOSTNAME

Before I do so, I need to jot down the existing configuration:

• ifconfig -a
• route
• hostname

Did I miss something?