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Also known as a system administrator. The administrator of a UNIX system performs the tasks associated with installing, configuring, managing, and monitoring a UNIX system. See also superuser and root
Advanced File System. A journaled, local file system that provides higher availability and greater flexibility than traditional UNIX file systems. Using transaction journaling, AdvFS recovers file system integrity in seconds, rather than minutes, after an unexpected restart such as a power failure.
AdvFS journaling also provides increased file system integrity. AdvFS provides greater flexibility by allowing filesets (file systems) to share a single storage pool and enabling hard and soft fileset quotas in addition to user and group quotas.
To store programs, data files, text files, and other types of files for safekeeping; a repository for such files.
Asynchronous Transfer Mode. A telecommunications concept defined by ANSI and ITU standards for carrying voice, data, and video signals on any User-Network Interface (UNI) and well suited for high-speed networking. Information is organized into cells.
Common Desktop Environment. The graphical user interface running on the desktop. CDE is compatible with the X Window System.
A graphical user interface for interacting with the operating system. The CDE interface was jointly developed and is based on industry standards, including the X Consortium's X Window System and the Open Software Foundation's Motif interface. See also CDE
An environment, described in RFC 1577, that provides a basic means of carrying unicast IP traffic over ATM networks. Hosts that can communicate with each other are grouped into a Logical IP Subnetwork (LIS) and have the same network/subnetwork number and mask.
A loosely coupled collection of servers that share storage and other resources that make applications and data highly available. A cluster consists of communications media, member systems, peripheral devices, and applications. The systems communicate over a high-performance interconnect. See also cluster member
The basic computing resource in a cluster. A member system physically must be connected to a cluster interconnect and at least one shared SCSI bus. The connection manager dynamically determines cluster membership based on communications among cluster members. See also cluster
Central Processing Unit. The main computational unit in a computer and the one that executes instructions.
The scheduling database that is controlling the allocation of system resources. See also scheduling database
Dynamic host configuration protocol. Enables the automatic assignment of IP addresses to clients on networks from a pool of addresses. The IP address assignment and configuration occurs automatically whenever client systems (workstations and portable computers) attach to a network. See also IP and protocol
Division of Privileges.
A set of tools that lets a system administrator configure privileges for users or groups who usually would not have those privileges.
After privileges are configured, the
dop
command lets a user or group execute an administrative action after proper authentication.
See also
privilege
Something that happens that may be of interest either to some part of a local or remote system or to a user.
A facility for communicating event information to interested parties for immediate or later action. An event management system may include storage and retrieval facilities.
The implementation on this operating system of an event management system. See also event management
Any program that processes events through a connection to the EVM daemon. See also event and EVM
Fiber distributed data interface. A set of ANSI/ISO standards that define a high-bandwidth (100 Mb/s) general-purpose local area network (LAN). It provides synchronous and asynchronous services between computers and peripheral equipment in a timed-token passing, dual ring of trees configuration. See also LAN
The collection of files and file management structures on a physical or logical mass storage device.
A host name containing one or more labels separated by a period. A label is a string, which begins with a letter and contains letters, digits, and hyphens and ends with a letter or a digit. A label can have between 2 and 63 characters, inclusive. A fully qualified host name can have a maximum of 254 characters.
Internet Control Message Protocol. A host-to-host protocol from the Internet Protocol suite that controls errors and operations of the Internet Protocol (IP). See also IP
The network layer protocol for the Internet Protocol (IP) suite. It is a connectionless, best-effort packet delivery service. IP includes the ICMP as an integral part. The IP suite is referred to as TCP/IP because IP is one of the two most fundamental protocols. See also ICMP
Internet Protocol switching. An environment based on the Ipsilon Networks, Inc. reference model in which one or more hosts are connected to an IP Switch through a point-to-point physical connection, with each physical connection as a separate subnet. The environment supports IP traffic only and multicast and broadcast services. See also IP
Local Area Network. A group of two or more computer systems (hosts) connected by a transmission medium, such as an Ethernet cable, token ring, or FDDI. Each host is connected to the transmission medium by a hardware interface. A LAN is a data communications network that spans a physically limited area, such as a single office building. It usually is owned by the organization it services and provides high-bandwidth communication over inexpensive media. See also FDDI and network
An environment defined by the ATM Forum that groups hosts into an entity called an emulated LAN. The environment identifies hosts through their 48-bit MAC addresses; supports multicast and broadcast services either through point-to-multipoint connections or through a multicast server; and supports any protocol that can operate over an IEEE broadcast LAN. See also LAN
Local Area Transport. This is a means by which a printer can be connected to a terminal server through the network, provided the server supports LAT protocol. Depending on the LAT server capabilities, the server can support one printer, through a LAT port name, or several printers, one per port, through a LAT service name. In Print Configuration, you can specify whether print requests sent to the LAT terminal server are directed to a specific printer (by specifying a LAT port name) or the next available printer (by specifying a LAT service name).
License Management Facility. An operating system utility that enables the online management of software license data and allows the use of licensed software.
(1) The computer system to which your terminal is directly connected. (2) In event management, local host is the host on which the event viewer is running. See also event management and remote host
Logical Storage Manager. LSM is an integrated, host-based disk storage management tool that protects against data loss, improves disk input/output performance, and customizes the disk configuration. LSM builds virtual disks, called volumes, on top of UNIX system disks. A volume is a special device that contains data used by file systems, databases, or other applications. LSM transparently places a volume between a physical disk and an application, which then operates on the volume rather than on the physical disk.
Two or more computing systems that are linked for the purpose of exchanging information and sharing resources.
Network File System. A facility for sharing files between systems through a connection to a network. NFS requires a designated server that exports file systems to one or more designated NFS Clients. Applications can read and write to files on NFS-mounted file systems as though the files were on the local host.
Network Information Service. A distributed data lookup service for sharing information on a local area network (LAN). NIS lets you coordinate the distribution of database information throughout your networked environment. Formerly named Yellow Pages. See also LAN
Product Authorization Key. (1) A list of essential information about a software license that must be registered in the license database for you to have access to a product. The PAK issuer produces the PAK and delivers it to you, usually as part of your product shipment. (2) A unique set of data used by the LMF to confirm that a product is licensed. See also LMF
The constraints placed on a file to control what the owner, other users, or other groups have permission read, write, or execute.
There are three sets of file permissions: those applied to the owner of the file, those applied to the group, and those applied to everyone else, called
other.
You can change the permissions of files you own by using the
chmod
command.
A privilege is associated with users or groups who have been granted the right to execute an action usually reserved for the
root
user.
See also
right
and
DOP
A set of semantic and syntactic rules that govern communications. A protocol defines how information is delivered, how it is encoded to reach its destination intact, and what path it follows. A protocol can also coordinate the flow of messages and whether or not messages are acknowledged upon receipt.
(1) Any node in a network other than your local node. (2) In event management, the remote host is any host other than the host on which the event viewer is running. See also event management and local host
A client that uses a connection to the EVM daemon to retrieve events from the log files. See also EVM client
Authorizes a user to perform an action on the system. Rights apply to the system as a whole and are different from permissions, which apply to specific objects. See also permissions, privilege, and DOP
(1) The login name for the system administrator (superuser). (2) The name applied to the topmost directory in the UNIX system's tree-like file structure; hence, the beginning of an absolute pathname. The root directory is represented in pathnames by an initial slash (/); a reference to the root directory itself consists of a single slash. See also superuser
A collection of users, groups, process groups, process IDs, and sessions that belongs to a scheduling database. Each scheduling class is allocated a percentage of CPU time. See also scheduling database, CPU
A collection of scheduling classes. Each class is allocated a percentage of system resources. See also scheduling class, current scheduling database
A user possessing privileges to override the usual restrictions on file access, process control, and so forth. See also root and administrator
UNIX File System. The standard file system type that is characterized by a hierarchical structure, the ability to create and delete files, dynamic growth of files, protection of file data, and the treatment of peripheral devices. See also file system
X Display Manager. Manages a collection of X displays, which may be on the local host or remote servers. XDM prompts the user for a user name and password and then starts the user's X session.
A network-based windowing interface developed by the Massachusetts Institute of Technology (MIT). The X Window System has been adopted by many major computer manufacturers.