---
name: "netdb"
section: "3tnm"
platform: "linux"
package: "scotty"
version: "4:00-02-21-2"
release: "Debian 3.0 (Woody)"
platforms: ["linux"]
url: "https://new.carta.tech/netdb"
---

# netdb(3tnm)

Access local network databases.

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## NAME

Tnm::netdb - Access local network databases.

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## DESCRIPTION

The Tnm::netdb command provides access to network information that is stored in configuration files, the Network Information Service (NIS) or in the Domain Name System (DNS). The results of the Tnm::netdb command usually depend on the local configuration of your operating system.

## NETDB COMMAND

- **Tnm::netdb hosts**

  - **Tnm::netdb hosts name** *address*

  - **Tnm::netdb hosts address** *name*

  - **Tnm::netdb hosts aliases** *address*

  The first version of the **Tnm::netdb hosts** command returns a list of all locally known hosts. Each element of this list contains a host name and its IP address. The result is an empty list on many systems that are configured to use the DNS for hostname lookups.  The second version of the **Tnm::netdb hosts** command converts an IP *address* into a host name and the third version of the **Tnm::netdb hosts** command converts a host *name* into an IP address. The fourth version of the **Tnm::netdb hosts** command returns a list of all  known aliases for an IP *address*.

- **Tnm::netdb networks**

  - **Tnm::netdb networks name** *address*

  - **Tnm::netdb networks address** *name*

  - **Tnm::netdb networks aliases** *address*

  The first version of the **Tnm::netdb networks** command returns a list of all locally known networks. Each element of this list contains a network name and the IP network address. The second version of the **Tnm::netdb networks** command returns the network name that belongs to the IP network *address* and the third version of the **Tnm::netdb networks** command returns the network address that belongs to a given network *name*. The fourth version of the **Tnm::netdb networks** command returns a list of all known aliases for an IP *address*.

- **Tnm::netdb protocols**

  - **Tnm::netdb protocols name** *number*

  - **Tnm::netdb protocols number** *name*

  - **Tnm::netdb protocols aliases** *number*

  The first version of the **Tnm::netdb protocols** command returns a list of all locally known Internet protocols. Each element of this list contains a protocol name and its protocol number. The second version of the **Tnm::netdb protocols** command returns the protocol name that belongs to *number* and the third version of the **Tnm::netdb protocols** command returns the protocol number that belongs to a protocol *name*. The fourth version of the **Tnm::netdb protocols** command returns a list of all known aliases for a protocol *number*.

- **Tnm::netdb services**

  - **Tnm::netdb services name** *number* *protocol*

  - **Tnm::netdb services number** *name* *protocol*

  - **Tnm::netdb services aliases** *number* *protocol*

  The first version of the **Tnm::netdb services** command returns the list of all locally known services. Each element of this list contains a service name, the service number and the transport protocol. The second version of the **Tnm::netdb services** command returns the service name for the service described by *number* and *protocol*. The third version of the **Tnm::netdb services** command returns the protocol number for the service described by *name* and *protocol*. The fourth version of the **Tnm::netdb** **services** command returns a list of all known aliases for a given service *number* and *protocol*.

- **Tnm::netdb sunrpcs**

  - **Tnm::netdb sunrpcs name** *number*

  - **Tnm::netdb sunrpcs number** *name*

  - **Tnm::netdb sunrpcs aliases** *number*

  The first version of the **Tnm::netdb sunrpcs** command lists all locally known Sun RPCs. Each element of this list contains a RPC name and its registration number. The second version of the **Tnm::netdb** **sunrpcs** command returns the RPC name for a given RPC *number* and the third version of the **Tnm::netdb sunrpcs** command returns the RPC number for a given RPC *name*. The fourth version of the **Tnm::netdb sunrpcs** command returns a list of all known aliases for a given RPC *number*.

- **Tnm::netdb ip apply** *address* *mask*

  - **Tnm::netdb ip broadcast** *address* *mask*

  - **Tnm::netdb ip class** *address*

  - **Tnm::netdb ip compare** *mask* *mask*

  - **Tnm::netdb ip range** *address mask*

  The first version of the **Tnm::netdb ip** command applies the *mask* to the *address* and returns the resulting subnet.  The **Tnm::netdb ip broadcast** command applies the *mask* to the *address* and returns the resulting broadcast address. The **netdb ip class** command returns the IP class of the *address* argument. The following classes are recognized: A, B, C, D and loopback. The **Tnm::netdb ip compare** command compares two masks and returns -1, 0 or 1, depending on whether the first mask is smaller, equal or greater than the second mask. The **Tnm::netdb ip** **range** command returns the list of IP addresses in the address range given by *address* and *mask*.

## SEE ALSO

[scotty(1)](/scotty/1.md), Tnm(n), [Tcl(n)](/Tcl/n.md)

## AUTHORS

Juergen Schoenwaelder \<schoenw@ibr.cs.tu-bs.de\>\