| File | Information |
| /etc/bootparams | Info about diskless nodes |
| /etc/ethers | Ethernet numbers (MAC addresses) |
| /etc/group | User groups |
| /etc/hosts | hostnames and IP addresses |
| /etc/aliases | Aliases and mailing lists for the mail system |
| /etc/netgroup | Netgroup definitions (used by NIS) |
| /etc/netmasks | Network masks |
| /etc/networks | Network addresses |
| /etc/passwd | User names, user ids and passwds |
| /etc/protocols | Network protocol numbers and names |
| /etc/rpc | Remote procedure call program numbers |
| /etc/services | Network port numbers and service names |