Semantic search
- Alarm Pinger
- Alarm Pinger (apinger) is a little tool which monitors various IP devices by simple ICMP echo requests. Unlike most Perl or shell script tools, it does not spawn processes or use much CPU time, and is ideal for when one wants continuous monitoring and fast response upon target failure. It supports both IPv4 and IPv6. Alarm Pinger is configurable via $sysconfdir/apinger.conf file. The configuration file contains definitions for alarms, targets and various parameters. It does need root privileges to start (to create raw sockets), but will drop them before sending or receiving any packets.
- Alist
- Alist is a program that collects hardware and software information about systems and stores it in a database for users to browse and search via a Web interface. The program consists of three parts: a client portion that collects the information, a daemon that receives data sent from clients, and a CGI that displays and lets you search for information.
- Alive
- Alive is a package that provides a command-line program to periodically make network contact with (aka “ping”) a specified host. Originally known as qADSL, it was also created to automate the annoying login process of several Swedish ISP's, e.g., Telia ADSL, COMHEM and Tiscali. After several years of inactivity, it was rewriten from scratch in 2012 by Thien-Thi Nguyen, leaving only the periodic ping.
- 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.
- AlterMIME
- 'alterMIME' is an integrated email/mailpack manipulation utility. It adds and modifies headers, adds disclaimers, and changes or removes embedded attachments based on filename or (for removals) content type.
- Am-utils
- The Berkeley Automounter, Amd, maintains a cache of mounted file systems, and lets users dynamically control which file system to mount with selectors. Selectors, which may be combined, allow decisions of the form "hostname is this," or "architecture is not that." Amd also supports numerous file system types, including NFS, UFS and the novel program file system. The combination of selectors and multiple file system types means that identical configuration files can be used on all machines. Amd will not hang if a remote server goes down, and can determine when a remote server has become inaccessible and mount replacement file systems when they become available.
- Amavisd-new
- 'amavisd-new' is an interface between MTAs and content checkers, including virus scanners, and/or the Mail::SpamAssasin Perl module. It talks to the MTA via (E)SMTP or LMTP, or by using helper programs. No timing gaps exist in the design, which could cause a mail loss. It is normally positioned at or near a central mailer, not necessarily where the user's mailboxes and final delivery takes place.
- AmphetaDesk
- AmphetaDesk downloads syndication news and information and displays it on a fully customizable Web page.
- 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.
- Andesaurux
- Simple OS that has a nanokernel(just unistd.h and unistd.c) and some useful programs(including listis)
- 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.
- 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.
- Apf
- 'apf' (active port forwarder) uses SSL for secure packet tunneling. It is meant for users without an external IP who want to make some services available on the Internet. afserver is placed on the machine with a publicly accessible address. afclient is then placed on the machine behind a firewall or masquerade, which makes the second machine visible to the Internet. You do not need root privileges to run afserver, nor does it use other processes. It uses 'zlib' to compress the transferred data.
- Apt-torrent
- 'apt-torrent' contains an apt to the BitTorrent gateway. It lets you fetch packages through the BitTorrent protocol
- Arpalert
- 'arpalert' listens on a network interface, catches all conversations of MAC address to IP request, and compares the MAc addresses it detected with a pre-configured list of authorized addresses. If the address is not on this list, arpalert launches an alert script with the MAC address and IP address as parameters. 'arpalert' can run in daemon mode and is very fast (low CPU and memory consumption). It responds at signal SIGHUP (configuration reload) and at signals SIGTERM, SIGINT, SIGQUIT and SIGABRT (Kwhere it stops itself).
- Asterisk-oh323
- 'asterisk-oh323' adds H.323 support to the ASTERISK soft PBX by interfacing the OpenH323 library to ASTERISK through a loadable module. The package provides the channel driver as well as a wrapper in a shared library form. It can initiate and receive calls to and from H.323 endpoints, and has been successfully tested with the H.323 terminals (ohphone, openphone) on the OpenH323 site.
- AstroCam
- AstroCam is an C-based Stepmotor Control system that includes a PHP Web interface. You can use it for controlling webcams over the Internet/intranet or for anything else you might want to do with a stepmotor.
- Aub
- 'aub' downloads articles from newsgroups and decode them automatically. It is simple, well documented, and easy to use and configure. It handles multi-part postings, and both uuencoded and base64 encodings.
- Aumonet
- Detects network and SSH server availability, mounts registered accesses and maintains them mounted accross network changes and interruptions.
- Auto nice daemon
- The auto nice daemon (AND) periodically activates itself and renices jobs according to priority and CPU usage. Jobs owned by root are left alone. Jobs are never increased in their priority. The renice intervals, the default nice level, and the activation intervals can all be adjusted. A priority database stores user/group/job tuples along with their renice values for three CPU usage time ranges. Negative nice levels are interpreted as signals to be sent to a process, triggered by CPU usage; in this way, browser sessions running amok can be killed automatically. The strategy for searching the priority database can be configured.
- Autorun
- 'autorun' automagically recognizes all available CDROMs in the system, mounts them upon insertion of a media and executes a possible autorun executable on the CD. The user can remove the media; autorun will call unmount after that.
- Autossh
- Autossh is a program to monitor and automatically reestablish SSH connections. It is similar to rstunnel (Reliable SSH Tunnel), but is easier to set up and use, especially for connections to multiple hosts. The program monitors connections by using a loop of port forwardings, and will back off on the rate of connection attempts when experiencing rapid failures (such as connection refused).
- Autothrottle
- 'Autothrottle' is a daemon that throttles your CPU according to the system load. It can be used with both ACPI and CPUfreq throttling. You can also specify different profiles for battery and AC power. When the daemon receives SIGHUP, it checks for AC power and alters the profile. This can be used e.g. from acpid when receiving AC events.
- AweMUD
- AweMUD is a MUD (Multi User Dungeon) server intended for highly interactive and depth-filled game worlds. Clean interface design and usability are also primary goals of the AweMUD project. AweMUD features an integrated scripting language, Scriptix, for defining world behaviour and extending the MUD engine. Parts of the engine which aren't alrea\dy written in Scriptix have hooks for over-riding their behaviour with scripts, an\d the source is readily modifiable for any other needs.
- BFilter
- BFilter is a smart filtering HTTP proxy. It removes ads, webbugs, and popups. Unlike the majority of similar tools, it doesn't rely on a list of blocked URLs, but instead parses HTML on the fly, and detects ads using a set of heuristic rules. BFilter has a built-in JavaScript engine which detects popups and js-generated ads.
- Backuppc
- BackupPC is a high-performance, enterprise-grade system for backing up GNU/Linux machines and laptops to a server's disk. Its features include clever pooling of identical files, no client-side software, optional compression for using even less storage, support for a full set of restore options, and a powerful Apache/CGI user interface.
- Bandwidthd
- 'bandwidthd' tracks usage of TCP/IP network subnets and builds HTML files with graphs to display network utilization. Charts are built by individual IP. It color codes HTTP, TCP, UDP, ICMP, VPN, and P2P traffic. Unlike MRTG, it tracks each individual IP address, not the status of any particular link.
- Batemail
- 'batemail' is a script that goes between your MTA (e.g. Sendmail) and your local mailer (e.g. Procmail) to strip potentially nasty attachments from email messages. It takes input on STDIN, removes executable MIME attachments, and gives the result to the local mailer. Taboo attachments are those whose filename ends in one of several "blacklisted" extensions (EXE, VBS, etc.).
- Bayonne
- Bayonne is the telephony server of the GNU project. Based on the ACS project, it offers a multi-line interactive voice response telephony server which may be scripted and telephony plug-ins for runtime driver configuration directly extended thru modular plugins. Bayonne also features "TGI" for making Perl applications "telephony aware". Support has been extended to include XML parsing and support has been started on VoIP integration to support next generation telephone networks. The project is not fully completed but is moving steadily towards producing a finished project that may be used to build telephony based system administration, home automation, automated attendant, v-commerce, and voice messaging systems.
- Bcfg2
- Bcfg2 allows you to describe and deploy complex configurations across pools of GNU/Linux and Unix systems, leading to a consistent, reproducible, and verifiable description of your environment. Bcfg2's visualization and reporting tools aid in your day-to-day administrative tasks. Its unique analysis features help you cope with the ever-increasing complexity of your networks.
- Biferno
- Biferno is a new object-oriented, HTML embedded, scripting language for web development. Its high-level built-in classes, with their methods and properties, make the code very clean and easy to mantain. It has a plug-in architecture that makes the language completely extensible, allowing other developer to easily add functionality through internal and external classes.
- Binkd
- Binkd is a Fidonet mailer designed to operate via TCP/IP networks. As a FTN-compatible internet daemon, it makes possible efficient utilization of TCP/IP protocol suite as a transport layer in FTN-based (Fido Technology Network) networks.
- Bitcoin-Qt
- Bitcoin-Qt is a multiplatform bitcoin client and wallet. Bitcoin is a network and a currency establishing a PKI for electronic cash transactions which is distributed P2P. To quote the developers, "Bitcoin is a decentralized P2P electronic cash system without a central server or trusted parties. Users hold the crypto keys to their own money and transact directly with each other, with the help of the network to check for double-spending."
- Bitflu
- Bitfu is a BitTorrent client designed to run non-stop as a daemon. It does not provide a graphical interface, but offers a telnet interface and can handle multiple torrent downloads.
- Bitwarden-ruby
- bitwarden-ruby is a server application for storing credentials, especially web-based login details. It includes an independent API reference. Compatible browser plugins can retrieve and fill in login credentials based on the current URL. bitwarden-ruby is a replacement for bitwarden-core, a freely licensed server application with a non-free dependency (the SQL Server database).
- BoPHP
- BoPHP is a Web interface for Boss Ogg. It plays Ogg Vorbis, MP3, and Flac files, and transparently uses SQLite as a database backend. Its artist/album/song scheme is particularly useful for large collections. It has a powerful import system based on filename and/or tags, and uses libao for output. The package currently supports OSS, Alsa, esd, arts, and others. Clients communicate via a powerful XML-RPC interface. Queue size is unlimited, and users can select what happens to the queue when it's empty or finished.
- Bobot++
- 'bobot++' is an IRC bot written in C++. Being the evolution of bobot, it provides time dependent commands, is multichannel, and has flood control, output priority control, and many other features. There are four user levels and three different protections. You cannot get operator privileges by spoofing the bot, and there is no backdoor.
- Bogofilter
- Bogofilter is a Bayesian spam filter. It takes an email message or other text on standard input, does a statistical check against lists of "good" and "bad" words, and returns a status code indicating whether or not the message is spam. It is designed with fast algorithms (including Berkeley DB system), and tuned for speed, so it can be used for production by sites that process a lot of mail.
- Boodler
- 'Boodler' lets you create or edit continuous streams of sound called 'soundscapes.' Each soundscape is a small piece of Python code -- typically less than a page. A soundscape can incorporate other soundscapes; it can combine other soundscapes, switch between them, fade them in and out. This package comes with many example soundscapes. You can use these, modify them, combine them to arbitrary levels of complexity, or write your own.
- Breeze
- 'breeze' aims to be a fast and powerful CD Digital-Audio Player. It may run as either a console app or as a daemon. It can control a cdrom that is playing live, can change track to the next or previous one, jcan jump backward or forward, and set a playlist and your information about cdda.
- Brltty
- BRLTTY is a daemon which provides access to the GNU/Linux console (text mode) for a blind person using a soft braille display. It drives the braille terminal and provides complete screen review functionality. The web site has a complete list of braille display models that are supported. Features include blinking cursor and capital letters, screen freezing for leisurely review, attribute displays and attribute underlining to locate highlighted text, hypertext links, intelligent cursor routing for easy cursor movement without moving your hands from the braille display, a cut and paste function, on-line help, and a modular design that lets you add drivers relatively easily.
- Browser-history
- An X daemon maintaining a browser-independent global history of visited sites.
- Bubblegum
- Bubblegum is a daemon which watches a files access, modification and inode change times and MD5 checksums, and logs and/or executes a command (with file information expansions) when detecting a change
- BuildBot
- Automates the compile/test cycle required by most software projects to validate code changes. It builds and tests the tree each time a change is committed, providing status updates through a Web page or other protocols.
- BulkWatch
- 'BulkWatch' monitors sendmail's logs and takes specified action when an IP has exceeded your configured maximum settings. You can specify that users may send X messages in X number of seconds. Email in excess of that triggers an action; it will display an alert to the screen in foreground mode; log an alert to syslog; email an alert to a predefined email address; or run an external command with the IP and number of messages as arguments.
- Bustd
- * Features
Insignificant memory usage!
bustd seems to use less memory than some other lean daemons such as earlyoom.
Also quite insignificant CPU usage
Much like earlyoom and nohang, bustd uses adaptive sleep times during its memory polling. Unlike these two, however, bustd does not read from /proc/meminfo, instead opting for the sysinfo syscall. This approach has its up- and downsides. The amount of free RAM that sysinfo reads does not account for cached memory, while MemAvailable in /proc/meminfo does. The sysinfo syscall is one order of magnitude faster, at least according to this kernel patch: https://sourceware.org/legacy-ml/libc-alpha/2015-08/msg00512.html (granted, from 2015). As bustd can't solely rely on the free RAM readings of sysinfo, we check for memory stress through Pressure Stall Information.
bustd locks all pages mapped into its address space
Much like earlyoom, bustd uses mlockall to avoid being sent to swap, which allows the daemon to remain responsive even when the system memory is under heavy load and susceptible to thrashing.
Checks for Pressure Stall Information
The Linux kernel, since version 4.20 (and built with CONFIG_PSI=y), presents canonical new pressure metrics for memory, CPU, and IO. In the words of Facebook Incubator:
- PSI stats are like barometers that provide fair warning of impending resource
- shortages, enabling you to take more proactive, granular, and nuanced steps
- when resources start becoming scarce.
- C-nocem
- This is a program for the easy and efficient applcation of the NoCeM protocol on the news spool. Which means, articles for which a NoCeM with 'action=hide" is accepted, will be deleted from your news system as if they had been cancelled. Unlike the standard implementation of NoCeM, this version is optimized for the most common case of 'spam cancels," In fact, it cn do nothing else.
- CDfs
- 'CDfs' is a file system that 'exports' all tracks and boot images on a CD as normal files. These files can then be mounted (e.g. for ISO and boot images), copied, played (audio tracks), etc. Its main goal is to 'unlock' information in old ISO sessions. The file system also lets you access data on faulty multi session disks, e.g. disks with multiple single sessions instead of a multi session.
- CIA
- CIA is a “version control informant” that relays commit notifications to IRC channels. The service running the CIA codebase is down since 2011, and the project no longer maintained. It provided real-time VCS commit notifications on various IRC networks. There were CIA hooks for subversion, git, bzr, etc, so a project just had to install such a hook into their repository and register on the CIA website.
- CRM114
- 'CRM114' is a Controllable Regex Mutilator and Smart Filter, designed for easy creation of filters for things like incoming email redirection, spam filtering, system logs, or monitoring processes. Filtering rules can be either hard-coded (such as regexes), soft-coded (calculated at runtime or read from an external file or process), or learned dynamically by phrase matching (by SBPH hashing). This makes it possible to create very accurate filters over (99.9%) with very little actual work.
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