[[Interface::command-line]]

Aerc: aerc is an email client for your terminal written in go. It was originally created by Drew DeVault and is now further developed as a fork by Robin Jarry. It features a tmux-style embedded terminal, an interactive terminal web browser, diff highlighting, an embedded less session, vim-style keybindings, and support for multiple accounts. It optionally supports notmuch. The client only downloads the information which is necessary to present the UI, making for a snappy and bandwidth-efficient experience. aerc supports IMAP, Maildir, SMTP, and sendmail transfer protocols. Asynchronous IMAP support ensures the UI never gets locked up by a flaky network, as mutt often does.

Afick: 'afick' is a multi-platform file integrity checker. It works by first creating a database that represents a snapshot of the essential parts of your computer system. You then run the script to discover all modifications made since the snapshot was taken (i.e. files added, changed, or removed). It shows new, deleted and changed files (rights, owner, size, content).

Aircrack: 'aircrack' is a set of tools for auditing wirelessnetworks. It consists of: airodump (an 802.11 packet capture program), aireplay (an 802.11 packet injection program), aircrack (static WEP and WPA-PSK cracking), and airdecap (decrypts WEP/WPA capture files).

Akfquiz: 'AKFQuiz' lets you make your own quiz games, learning exercises or psychotests. These can be used with grquiz in a graphical environment, or with scrquiz on the text-console. There is also a line oriented variant, linequiz, which can be used as a backend. A CGI-variant, cgiquiz, can be installed on a Web server to offer exercises via Internet or a local network. Or you can use mkquiz, which generates an HTML-file for to use with JavaScript. Those can then be published using any web-space provider.

Alacritty: Launched in 2017, Alacritty is a terminal emulator that uses Rust (a memory-safe language) and OpenGL for rendering everything, aiming for perfomance, security, configurability, and simplicity. A list of Alacritty's features can be found here. Alacritty is currently in beta, but is already used as a daily driver by many people. It is also the default terminal emulator for Sway, a Wayland-native WM. Another Wayland-native, GPU-accelerated terminal emulator is kitty.

Ald: The Assembly Language Debugger (ALD) differs from GDB in that it is specifically designed to debug programs at the assembly level. It is often difficult and frustrating for assembly programmers to use GDB to debug their work. ALD aims to provide everything an assembly programmer needs to debug their code.

Aldo: Aldo is a Morse code tutor with three kinds of exercises: Classic exercise, the Koch method, and exercises read from files. In classic exercise, you must guess some random strings of characters that Aldo plays in Morse code. The package has 6 skills; speed can be selected in cpm or wpm.

Alexis FTP (aftp): aftp is an FTP library and a background FTP tool. The aftp tool is a good example on how to use the library. You need FTP functionality in your software? Use the aftp library!

Alexis Makes (amake): AMake is a make tool which uses powerful pattern transformation enabling a single makefile to automatically handle the compilation of any level of directory hierachy and have the possibility to add files in a project without having to modify even a character of the makefile thus saving a lot of time.

Alfandega Firewall: Alfandega Firewall is a collection of Perl modules that helps users to implement iptables-based firewalls for two interfaces. It provides local and remote blacklists, spoofing checks, packet forwarding, ICMP control, service configuration, and more.

Algol 68 Genie: Algol68G (Algol 68 Genie) is an Algol 68 implementation. Its front-end parses an entire Algol 68 source program. If parsing is successful, the syntax tree (that serves as an intermediate program representation) is interpreted by Algol68G's back-end. The interpreter performs many runtime checks.

Alien: 'alien' converts between the rpm, deb, Stampede slp, and Slackware tgz file formats. If you want to use a package from a distribution different from the one installed on your system, 'alien' will convert it to your preferred package format and install it. However, 'alien' should not be used to replace important system packages, like sysvinit, shared libraries, or other things that are essential for the functioning of your system. Many of these packages are set up differently by Debian and Red Hat, and packages from the different distributions cannot be used interchangably.

Align: 'align' is a general-purpose text filter tool that helps vertically align columns in string-separated tables of input text. It also includes width, another general-purpose text filter tool that helps you work with the printing width or length of lines of input text.

Allegro: Allegro is multi-platform game programming library for C/C++ developers distributed freely, that provides many functions for graphics, sounds, player input (keyboard, mouse and joystick) and timers. It also provides fixed and floating point mathematical functions, 3d functions, file management functions, compressed datafile and a GUI. It can also be used for other types of multimedia programming.

Alleyoop: Alleyoop is a graphical front-end to the increasingly popular Valgrind memory checker for x86 GNU/Linux using the Gtk+ widget set and other GNOME libraries for the X-Windows environment. Features include a right-click context menu to intelligently suppress errors or launch an editor on the source file/jumping to the exact line of the error condition. A searchbar at the top of the viewer can be used to limit the viewable errors to those that match the regex criteria entered. Also included is a fully functional Suppressions editor.

Almclk: This is a candidate for deletion: 1. No files/source found 'Almclk' lets you set an alarm on your terminal. It sends a message to your terminal when the alarm goes off, and pops up a window if possible. If you are not logged in at the time, it sends you a customizable e-mail message which is also printed. Also, a 5-minute warning is sent to your terminal and popped up as a window if possible. If you wish to kill the alarm, a script is created for you to do so.

Alpine3D: Alpine3D is a spatially distributed (surface), three dimensional (atmospheric) model for analyzing and predicting dynamics of snow-dominated surface processes in mountainous topography. It includes models for snow cover (SNOWPACK), vegetation and soil, snow transport, radiation transfer and runoff which can be enabled or disabled on demand.

Alsaplayer: AlsaPlayer is a PCM player written with the ALSA sound system in mind. It also includes support for JACK, OSS, NAS, and ESD. It makes extensive use of multi-threading and supports OGG, MP3, WAV, CDDA (CD Digital Audio), MOD, S3M, IT, and many other input types. Features include a real- time effects stream, variable speed/pitch control, multiple active visual scopes, command line mode, playlists, plugin architecture, low-latency mode, and more.

Alterparagraphs: Alterparagraphs is an ongoing effort for providing a family of paragraph implementations, each to be used as a replacement for the regular and only paragraph flowable inside the ReportLab package. The idea behind this collection of paragraphs is to provide simple implementations that can be more easily understood and extended than the monolithic paragraph implementation as implemented by ReportLab. Note that many of the paragraph classes in alterparagraphs are not finished in the sense that they are directly ready for production (this is especially true for the XMLParagraph, the development of which has barely started). You must test yourself if they are suitable for your purpose. In any case it should be much easier to tweak them to make them do what you need compared to the standard ReportLab implementation.

Amanda: AMANDA, the Advanced Maryland Automatic Network Disk Archiver, is a backup system that allows the administrator of a LAN to set up a single master backup server to back up multiple hosts to a single large capacity tape drive. AMANDA uses native dump and/or GNU tar facilities and can back up a large number of workstations running multiple versions of Unix. Recent versions also support SAMBA.

Amber: 'amber' aims to be an easy-to-use granular synthesis tool for GNU/Linux to assist composers and electronic musicians in creating interesting and complex sounds. More information on the theory and application of granular synthesis techniques can be found at http://shoko.calarts.edu/~eric/gs.html.

Ambisuite: 1. AMBCALC a Perl script that prints out channel values for a given azimuth and elevation. Should work on any platform with Perl installed, thusfar tested on Linux. 2. AMBINFO a Perl script that reads WAVEX header (same comment regarding platforms as ambcalc). 3. AMBMAN a Perl collection of utilities for manipulating, converting etc. ambisonic files. 4. WAV2AMB a Perl script that 'corrects' the headers on Wave Format Extensible files (same comment regarding platforms as ambcalc ).

Amnesia: Hopefully with Amnesia you'll know exactly whats happening with memory when it comes to memcached. Its always nice to have some statistics to see how everything is performing within your stack. Memcached seems to be a mystery box that people don't really pay alot of attention to. Amnesia tells you how your application is performing, when it misses, when it is running sweet, when you're about to run out of memcached and (perhaps) fall down in a screaming heap.

An Gramadoir: An Gramadóir is intended as a platform for the development of sophisticated natural language processing tools for languages with limited computational resources. It is currently implemented for the Irish language (Gaeilge); this is, to the best of my knowledge, the first grammar checker developed for any minority language. Ports for Afrikaans, Cornish, Esperanto, Walloon, and Welsh are currently underway. The grammar checker can be called from emacs, vim, or OpenOffice. Various components of the engine can be bootstrapped using statistical methods based on text corpora.

Anastasis ,: Anastasis is a key recovery system that allows the user to securely deposit shares of a core secret with an open set of escrow providers, to recover it if the secret is lost. The core secret itself is protected from the escrow providers by giving each provider only part of the information, and additionally by encrypting it with an identity-based key unknown to the providers.

And-httpd: And-httpd is an HTTP server that maps URLs to files. In other words, in can take an incoming URL and map it to a file in a number of ways (for example, according to content type or language). It can also do authentication or IP based ACLs. It cannot do CGI or other kinds of code execution. It cannot even dynamically create directory listings (although it comes with external tools to do so automatically, and to create a "status page"). It currently has a $2000 "security guarantee" against remote attacks.

Andatool: 'andatool' displays in real time how often regular expressions match with the lines written to a logfile. This shows (for example) which firewall rules get triggered the most.

Andesaurux: Simple OS that has a nanokernel(just unistd.h and unistd.c) and some useful programs(including listis)

Animail: Animail is a multiserver POP3/APOP/IMAP4 (with or without SSL) mail retrieval utility. It has an advanced filtering system based on blacklisting, whitelisting, or a combination of both, and can send an autoresponse which prompts people to reply and add themselves to the 'autoaccept' file. It also allows filters based on regular expressions which match against email headers. (If a message is filtered, only the header is downloaded, not the entire body.) users can also combine external filtering programs (e.g. SpamAssassin or Bogofilter) as message post-download plugins, which extends filtering capabilities in an unlimited way. Delivery options include mailbox, maildir, local SMTP, and pipe to a command.

Anontwi: Anontwi - is a tool for OAuth2 applications (such as: GNUSocial, Twitter...) that provides different layers of encryption and privacy methods.

Ansiprint: 'ansiprint' is a utility for printing text files (or stdin) from remote terminals using ANSI telnet escape sequences. Output is to either stdout (default) or /dev/tty (in case something is trapping stdout). The program prints a form-feed character to separate multiple file; it can also print a form feed after all pages/files are printed (both of these functions can be optionally disabled). The user can specify the size of the read/write buffer. The program is based on 'pine' but has been completely re-written in C++.

Ant: Ant is a Java based build tool, similar to make, but with better support for the cross platform issues involved with developing Java applications. Instead of a model where the tool is extended with shell based commands, it is extended using Java classes. Instead of writing shell commands, the configuration files are XML based calling out a target tree where various tasks get executed. Each task is run by an object which implements a particular Task interface.

Ant-phone: ANT is a desktop ISDN telephony application written for GNU/Linux. It supports OSS (Open Sound System) and I4L (ISDN4Linux). Its user interface was made for GTK+ 2.x (GIMP toolkit). It directly interfaces OSS and ISDN devices, so there is no need to install extra software or hardware like PBX or telephony cards, if you've got direct access to an audio capable ISDN card and a full duplex soundcard or two sound devices.

AntiExploit: 'AntiExploit' scans for well known exploit files. It currently recognizes over 1700 suspicious files, and the database is updated weekly. It is not meant to be a IDS or high-profile security-application, but rather an extension to other security checks. 'aexpl' was developed for a freeshell-server to track script-kiddies.

Antidote: Antidote is an free software implementation of the IEEE 11073-20601 standard. It also contains the implementation of a D-Bus based 11073 manager service.

Antiparser: antiparser is a fuzz testing and fault injection API. Fuzz testing has application as a security research methodology and for software quality assurance purposes. The purpose of antiparser is to provide an API that can be used to model network protocols and file formats by their composite data types. Once a model has been created, the antiparser has various methods for creating random sets of data that deviates in ways that will ideally trigger software bugs or security vulnerabilities.

Anubis: Anubis is an SMTP message submission daemon. It represents an intermediate layer between mail user agent (MUA) and mail transport agent (MTA), receiving messages from the MUA, applying to them a set of predefined changes and finally inserting modified messages into an MTA routing network. The set of changes applied to a message is configurable on a system-wide and per-user basis. The built-in configuration language used for defining sets of changes allows for considerable flexibility and is easily extensible. GNU Anubis can edit outgoing mail headers, encrypt and/or sign mail with the GNU Privacy Guard, build secure SMTP tunnels (Simple Mail Transport Protocol) using the TLS/SSL encryption even if your mail user agent doesn't support it, or tunnel a connection through a SOCKS proxy server.

Apache AxKit: Apache AxKit is an XML Application Server for Apache. It provides on-the-fly conversion from XML to any format, such as HTML, WAP or text using either W3C standard techniques, or flexible custom code. AxKit also uses a built-in Perl interpreter to provide some amazingly powerful techniques for XML transformation.

Apache CouchDB: Apache CouchDB is a distributed, fault-tolerant and schema-free document-oriented database accessible via a RESTful HTTP/JSON API. Among other features, it provides robust, incremental replication with bi-directional conflict detection and resolution, and is queryable and indexable using a table-oriented view engine with JavaScript acting as the default view definition language. CouchDB is written in Erlang, but can be easily accessed from any environment that provides means to make HTTP requests. There are a multitude of third-party client libraries that make this even easier for a variety of programming languages and environments.

Apache Session: Apache::Session is a persistence framework designed to provide session management to web developers. It is intended to work with Apache and mod_perl, but it does not depend on them and will work with any web server. This module provides a set of classes that give the developer maximum functionality. Session data can be stored in a database, flat files, or shared memory.

Apertium: Apertium is a machine translation platform. Data for a language pair can be used to translate text in various formats from one language to another.

App: 'App' is a C++ preprocessor for that accepts as input arbitrary C++ code that may contain embedded constructs for specifying algebraic data types and associated pattern matching operations, and produces as output the same code with all such constructs translated to normal C++. 'app' provides for C++ the same capabilities that functional languages have regarding algebraic types. 'Applib' is the associated runtime library that supports the core run time requirements of the translated code, and which provides additional utilities.

AppTools

The AppTools project includes a set of packages that Enthought has found useful in creating a number of applications. They implement functionality that is commonly needed by many applications

enthought.appscripting: Framework for scripting applications.
enthought.help: Provides a plugin for displaying documents and examples and running demos in Envisage Workbench applications.
enthought.io: Provides an abstraction for files and folders in a file system.
enthought.naming: Manages naming contexts, supporting non-string data types and scoped preferences.
enthought.permissions: Supports limiting access to parts of an application unless the user is appropriately authorised (not full-blown security).
enthought.persistence: Supports pickling the state of a Python object to a dictionary, which can then be flexibly applied in restoring the state of the object.
enthought.preferences: Manages application preferences.
enthought.resource: Manages application resources such as images and sounds.
enthought.scripting: A framework for automatic recording of Python scripts.
enthought.sweet_pickle: Handles class-level versioning, to support loading of saved data that exist over several generations of internal class structures.
enthought.template: Supports creating templatizable object hierarchies.
enthought.type_manager: Manages type extensions, including factories to generate adapters, and hooks for methods and functions.
enthought.undo: Supports undoing and scripting application commands.

Apparix: Apparix enables fast file system navigation by bookmarking directories and later jumping to them using the mark. The contributed bash completion code allows one to complete on bookmarks and on subdirectories of the target directory.

Appctl: Appctl is a framework for virtually any server software. It provides a central script called "ctl" which allows you to start, stop, restart, maintain, or query the current status of an application. It is meant as a completely generic replacement for application-specific startup/stop scripts. The project also supplies generic monitoring scripts for clusters, which can dramatically decrease clustering costs.

Apsfilter: Apsfilter is a magic print filter with automatic file type recognition. It features on-the-fly decompression and conversion, and works on both PostScript and non-PostScript (via Ghostscript) graphical printers. This package makes printing many file formats much easier. Among the supported formats are: gzip, bzip2, compress, freeze, pack, ASCII, BMP, data (PCL, etc.), DVI, FBM, FIG, FITS, GIF, Group 3 fax, HTML, IFF ILBM, JPEG, Kodak Photo CD, MGR, MIFF, PBM/PGM/PNM/PPM, PDF, PNG, PostScript, RLE, SGI, Sketch, Sun raster, Targa, TIFF, troff, WPG, X pixmap, XCF. Note that actual support depends on the installed filter programs.

Apvsys: 'apvsys' is a wrapper designed to manage different versions of applications (engineering tools, compilers, debuggers, etc.). It is not a source-code version control system like CVS or RCS. Users need only one path to access all versions of all tools; they can access a default version without any setting. The application settings needed to start a tool properly are centralized by the ApVSys administrator, so there is NO setting needed for the users. Hence, all the users share exactly the same environment, which greatly reduces the support needed.

Ara: 'Ara' is a command-line utility for querying the Debian package database. It has a query syntax allowing you to search for boolean combinations of regular expressions. It includes a simple syntax and line-editing. A graphical interface, xara, is also provided.

Arbitools

Administration of Chess Tournaments has been monopolized by non-free software. The lack of free tools makes it very difficult for an arbiter to use GNU/Linux. Arbitools is born to become a colection of utilities for the most common tasks. It is desgined to make it easy to extend. It has been written in python in order to make multiplatform support easy. FEATURES:

Different types of files supported.
Updating data in different types of tournament database files.
Adding lists of players to already created files.
Getting standings from tournament database files.
Add custom tiebreaks to tournament database files.
Get tournament report files.

Archimedes: Archimedes is for semiconductor device simulations. It is intended to assist engineers in designing and simulating submicron and mesoscopic semiconductor devices based on the Ensemble Monte Carlo method. It is able to handle a wide variety of materials and structures, which are described through simple scripts. It is a 2D Monte Carlo simulator which can take into account all the relevant quantum effects by means of Bohm effective potential. The description of the device is very general and made by means of a simple script language, which makes GNU Archimedes a powerful tool for the simulation of quite general 2D semiconductor devices. Some very interesting results have been obtained and they will be put, as soon as possible, on the web page (some results are already available in the documentation).

Free Software Foundation!

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