ConMan is a serial console management program designed to support a large number of console devices and simultaneous users. It supports local serial devices, remote terminal servers (via the telnet protocol), IPMI Serial-Over-LAN (via FreeIPMI), Unix domain sockets, and external processes (e.g., using Expect to control connections over telnet, ssh, or IPMI Serial-Over-LAN). Its features include logging (and optionally timestamping) console device output to file, connecting to consoles in monitor (R/O) or interactive (R/W) mode, allowing clients to share or steal console write privileges, and broadcasting client output to multiple consoles.
DBLog is a logging program for radio amateurs based on a relational database. It allows the user to log QSOs and export a range of them in ADIF format. It can read the radio frequency via CAT interface. It includes a CW Keyer based on cwdaemon. It works with fldigi for digi-modes, and can store QSL pictures with QSO data.
DIY Zoning is a set of tools and instructions for controlling a state-of-the-art HVAC (Heating, Ventilation, and Air Conditioning) system. It covers airflow balancing, temperature control and zoning, energy conservation measures, remote access, 1-wire devices, and home automation.
Darpwatch provides a system for monitoring wide area ethernet networks. Based on the original arpwatch source code, it consists of two components: a "darpwatch" monitoring daemon that can run in multiple locations to watch ethernet activity, and a "darpwatchd" central logging and analysis server, which receives reports from monitoring daemons and generates alerts if appropriate.
Dconf is a tool to collect a system's hardware and software configuration. It allows you to take your system configuration with you and compare systems (like nodes in a cluster) to troubleshoot hardware or software problems. It can also be configured to send out configuration changes at given intervals to a group of people, or store a new snapshot when system changes happen.
DSM (Dedicated Server Manager) Standard is a solution for hosting companies and organizations who need to combine a Web server, mail server, DNS server, or a fully featured Web hosting environment. DSM Standard offers four levels of interface access: root user, reseller, site-owner, and mailuser.
DenyThem is a program designed to protect your Linux system from malicious attacks. It is an active response system to disrupt and block dictionary attacks and DOS attacks. DenyThem by default uses /var/log/syslog and /var/log/auth.log and searches for hack attempts. When DenyThem finds enough hack attempts from a single host, it will add a DROP statement to your system's firewall, thus preventing future attacks. DenyThem uses iptables, so it will only work on Linux or any other system that uses iptables. It can also block traffic from specific countries.