dict is a client for Dictionary Server Protocol (DICT), a transaction-based TCP request/response protocol that provides access to dictionary definitions from a number of natural language dictionary databases. Log definition file. It describes the different DARPA Internet protocols available in the TCP/IP subsystem. It should be consulted instead of using the numbers in the LPRA inclusion files or resorting to conjecture. This file should remain intact as the changes may result in incorrect IP packets. Definition of the networks, services and associated port for each protocol available on this machine. For example, Web services (http) are assigned port 80 by default. # /etc/services: # $Id: etc.xml,v 1.10 2004/02/03 21:42:57 binh Exp $ # # Network services, Internet style # # Note that IANA`s current policy is to assign a single # known port number for TCP and UDP; Therefore, most of the # entries here have two entries, even though the protocol does not support UDP# operations. RFC 1700 update, “Assigned Numbers” (October # 1994). Not all ports are included, only the most common.
An excessive number of attributes can be changed through this single file, such as the location of emails, the delay in seconds after a connection fails, the display of error log information, the display of unknown login errors of the user name, shell environment variables, and so on. Printer configuration file (functions). The definition of all system printers, whether local or remote, is stored in this file. The layout is similar to /etc/termcap, but uses different syntax. Read the full article: www.linuxnix.com/linux-directory-structure-explainedetc-folder/ Autoconf macros are defined in multiple files. Some files are distributed using Autoconf; Autoconf reads them first. It then locates the optional acsite.m4 file in the directory that contains the distributed autoconf macro files and the optional aclocal.m4 file in the current directory. These files can contain the autoconf macro definitions for your site or package. If a macro is defined in more than one of the files read by autoconf, the last definition read replaces the previous ones. Essential for security. This subdirectory allows administrators to set quota limits and access restrictions, and configure PAM environments.
The cp command is rare because the uppercase and lowercase options for an action are the same. Of course, when you copy files, you can use placeholders to filter them with templates: MIME TYPES and the extensions they represent. This file is part of the mime support package. Note: Compression schemes such as gzip, bzip, and compress are not actually “mime types”. These are “encodings” and must therefore have _no_ entries in this file to reflect their extensions. The “MIME type” of an encoded file refers to the type of data that was encoded, not the type of encoding. In the early days of UNIX, it was both necessary and practical to give short names. Thus, all system directories have been limited to 3 letters and these are abbreviations. These names are still present on modern Linux systems. (e.g.
usr-user, var-variable, lib-library). etc comes from `et cetera`, but I`ve seen on several pages that a backronym is mentioned that would represent the current function of etc: `editable text configuration`, but again, it`s just a modern adaptation to better represent what`s inside. As you guessed, /etc is from etcetera, unnecessarily named after “where everything else goes”, and /usr was for “user applications”. Many details about the history of the file system hierarchy standard are documented on Wikipedia. There are times when you don`t need a CD in a specific directory. You can play a file from its current location if you specify the full path to the file that you want to view. For example, you do not need a cd in the /usr/bin directory to run the pwd command. You spend it from your current location because it`s on the way. Low Bandwidth X (LBX) proxy server configuration files. Applications that want to use the Low Bandwidth Extension to X (LBX) must connect to an lbxproxy.
These applications don`t need to know anything about LBX, they simply connect to the lbxproxy as if it were an ordinary X server. The lbxproxy accepts client connections, multiplexes them on a single connection to the X server, and performs various optimizations of the X protocol to make it faster on low-bandwidth and/or high-latency connections. It should be noted that such compression does not increase the rendering speed too much. Its main objective is to reduce the load of the network and thus increase the overall latency of the network. A competing project called DXPC (Differential X Protocol Compression) proved to be more efficient in this task. However, studies have shown that in almost all cases, X`s ssh tunneling gives much better results than by one of these specialized software. Scripts or directories of scripts to run at startup or when the execution level changes. See section 2.3.1 for more information. The abbreviation “usr” from “/usr” does not mean user.
That was until about 10 years ago. Since about 2000, it has been short for “Unix System Resources”. Home configuration files for twm. Original tabbed window manager. Today`s message is displayed automatically after a successful connection. The content is the responsibility of the system administrator. Often used to provide information to each user, such as alerts about planned downtime. As you can see, the file layout is quite simple and tends to be quite standard in most distributions. At the top are the locations of the different font files for X (Note – X will not start if you do not specify a valid font), then the “Modules” section.
It describes in detail the modules that must be loaded at startup. Probably the most well-known extensions are GLX (required for 3D rendering of graphics and games) and Xinerama, which allows users to extend their desktop across multiple monitors. Then there are the different “device” sections that describe the type of hardware you have. Misconfiguration of these subsections can lead to grief and trauma with seemingly misplaced keys, bewitched mice, and constant blinking when X tries to restart in a sometimes endless loop. In most cases, when everything else fails, the vesa driver seems to be able to initialize most modern graphics cards. In the “Screen” section, it is possible to change the default resolution and boot depth. It is often possible to change these attributes on the fly using alt-ctrl-+ or alt-ctrl- keystrokes. Finally, the sections are ServerLayout and DRI. Users will almost never touch the “DRI” section and only those who want to use X`s Xinerama extensions need to change any of the ServerLayout options. In the early days of UNIX operating system development, there is a folder for each data type, such as the /bin folder for all your executable binaries/boot folder for all boot-related information./dev for all hardware devices connected to the computer.
But people have come across a situation to keep certain files that can be a configuration file or a data file or a socket file or other files. So they implemented a folder to keep all these files there, and they named it /etc (as mentioned earlier, etc.). Over time, the meaning of this folder has changed, but not the name “etc”. Now the /etc folder means that there is a central location for all your configuration files and this can be treated as the nerve center of your Linux/Unix machine.
