Certain files in the operating system are required to have a specific format. The formats of the files that are provided with the operating system are discussed in the documentation for those files. If a file is generated by either the system or a user rather than provided on the distribution medium, it is discussed as a file format in this documentation. File formats often are also associated with header files that contain C-language definitions and structures for the files.
More information about the following file formats is provided in this documentation:
| acct | Describes the format of the records in the system accounting files. |
| ar | Describes the format of an archive file. |
| audit | Describes values used by the auditing system as well as the structure of a bin. |
| bootptab | Describes the default configuration database for the Internet Boot Protocol server (bootpd). |
| CGM | Defines a file format for storage and retrieval of device-independent graphics. |
| charmap | Defines character symbols as character encodings. |
| core | Describes the structures created in a core file as a result of a core dump. |
| cpio | Describes the cpio (copy in/out) archive file. |
| eqnchar | Contains special character definitions for the eqn and neqn commands. |
| lastlog | Defines the last login attributes for users. |
| ldapattribmap | Defines AIX® to LDAP attribute name mapping to support configurable LDAP server schema. |
| locale definition | Contains one or more categories that describe a locale. |
| locale method | Specifies the methods to be overridden when constructing a locale. |
| magic | Defines file types. |
| mailrc | Sets defaults for the mail command. |
| mh_alias | Defines aliases for the Message Handler (MH). |
| mib_defs | Provides descriptions of Management Information Base (MIB) variables for the snmpinfo command. |
| nroff and troff input | Specifies input file format for the nroff and troff commands. |
| nterm | Describes the format of the terminal driver tables for the nroff command. |
| profile | Describes the format of the profile and .profile files, which set the user environment at login time. |
| queuedefs | Describes the format of the file used by the cron daemon to handle event types. |
| sccsfile | Describes the format of a Source Code Control System (SCCS) file. |
| setmaps | Defines the text of a code-set map file and a terminal map file. |
| terminfo | Contains compiled terminfo source files. |
| TIFF | Enables InfoCrafter to support scanned images that have been imported into Interleaf documents. |
| trcfmt | Stores trace templates. |
| troff | Describes the output language of the troff command. |
| troff Font | Describes the format of the troff command font files. |
| tunables | Centralizes tunable parameter values. |
| UIL | Contains information on the user interface for a widget-based application. |
| utmp, wtmp, failedlogin | Describes the format of the user and accounting information in the utmp, wtmp, and failedlogin files. |
| vgrindefs | Contains the language definition database for the vgrind command. |
| WML | Generates variable UIL compiler components. |
| ate.def | Determines default settings for use in asynchronous connections and file transfers. |
| ATE Dialing Directory | Lists phone numbers that the ATE program uses to establish modem connections. |
| Devices | Contains information about devices on the local system that can establish a connection to a remote computer using the Basic Networking Utilities (BNU) program. |
| Dialcodes | Contains the initial digits of telephone numbers used to establish remote connections over a phone line. |
| Dialers | Lists modems used for Basic Networking Utilities (BNU) remote communications links. |
| Maxuuscheds | Limits the number of instances of the uusched and uucico daemons that can run simultaneously. |
| Maxuuxqts | Limits the number of instances of the BNU uuxqt daemon that can run simultaneously on the local system. |
| Permissions | Specifies BNU permissions for remote systems that call or are called by the local system. |
| Poll | Specifies when the BNU program should poll remote systems. |
| Systems | Lists remote computers with which users of the local system can communicate using the Basic Networking Utilities (BNU) program. |
| phones | Describes connections used by the tip command to contact remote systems. |
| remote | Describes remote systems contacted by the tip command. |
| .tiprc | Provides initial settings of variables for the tip command. |
| 3270keys | Defines user keyboard mapping and colors for TELNET (3270). |
| Domain Cache | Defines the root name server or servers for a DOMAIN name server host. |
| Domain Data | Stores name resolution information for the named daemon. |
| Domain Local Data | Defines the local loopback information for named on the name server host. |
| Domain Reverse Data | Stores reverse name resolution information for the named daemon. |
| /etc/ftpd.cnf | Specifies configuration parameters of the ftpd daemon to start a TLS session. |
| .ftpcnf | Specifies configuration parameters of the ftp command to start a TLS session. |
| ftpusers | Specifies local user names that cannot be used by remote FTP clients. |
| gated.conf | Contains configuration information for the gated daemon. |
| gateways | Specifies Internet routing information to the routed and gated daemons on a network. |
| hosts | Defines the Internet Protocol (IP) name and address of the local host and specifies the names and addresses of remote hosts. |
| hosts.equiv | Specifies remote systems that can execute commands on the local system. |
| hosts.lpd | Specifies remote hosts that can print on the local host. |
| inetd.conf | Defines how the inetd daemon handles Internet service requests. |
| map3270 | Defines keyboard mapping and colors for the tn3270 command. |
| netcd.conf | Defines parameters for the netcd daemon. |
| .netrc | Specifies automatic login information for the ftp and rexec commands. |
| networks | Contains the network name file. |
| protocols | Defines the Internet protocols used on the local host. |
| rc.net | Defines host configuration for the following areas: network interfaces, host name, default gateway, and any static routes. |
| resolv.conf | Defines DOMAIN name server information for local resolver routines. |
| rfc1108 | Contains the mapping between AIX® Trusted Network labels and rfc1108 labels. |
| .rhosts | Specifies remote users that can use a local user account on a network. |
| services | Defines the sockets and protocols used for Internet services. |
| Standard Resource Record Format | Defines the format of lines in the DOMAIN data files. |
| telnet.conf | Translates a client's terminal-type strings into terminfo file entries. |
| cgaparams.sec | Defines the color graphics adapter (CGA) parameter keywords for the ndpd-host daemon and autoconf6 command. |
| ndpdh.cnf | Defines the configuration file locations for the ndpd-host daemon and the autoconf6 command. |
| sendh_anchor | Defines the trusted anchor for the ndpd-host daemon. |
| sendr_anchor | Defines the trusted anchors for the ndpd-router daemon. |
| tempaddr.conf | Defines if temporary addresses should be allowed or denied |