Treeps is program for Unix/Linux that is designed to make monitoring and interacting with the running programs on your system easy and intuitive. A "real time" tree view shows the relationships between the processes and is color-coded to provide easy interpretation of various values. The process tree displays any combination of users/groups and can be used to drill down into process details and then extract key fields for continuous monitoring. A number of actions can be performed on processes, such as signal, renice, trace, view man page, etc.
Treewatch watches a directory for a specified type of file to change. When one of the files changes, treewatch runs a program of the user's choice. By default, treewatch will watch the current directory and run "make" when changes are detected in files ending in .cpp, .c, or .h. The user can specify any number of directories to watch, any number of file types to watch for, and any command line to run.
trend is a general-purpose, efficient trend graph for "live" data. Data is read in ASCII format from a file or continuously from a FIFO, and is played in real-time into a multi-pass trend (much like a CRT oscilloscope or a strip chart). trend can be used as a rapid analysis tool for progressive or time-based data series together with trivial scripting.
tresor is an application for performing full backup and fast restores with bytepositioning tape drives. This option is available on some Tandberg and Wangtek streamers and some SCSI-2 tape drives. It features flexible configuration, a database for multiple volumes, fast restores (due to direct seeking), a graphical user interface, tape operations based on dd, afio, and mt, and tape identification using its own header. Language support for German and English is included.
trickle is a lightweight, portable, per-application bandwidth shaper. It works in collaboration, has peak detection, and does smoothing. trickle works entirely in userland and does not require root to run. It has been developed on OpenBSD and is known to run on Linux, FreeBSD, and Solaris.
trojuhelnik is a general solver for triangles. It computes all possible solutions for a triangle that is specified by an arbitrary triple of the following elements: sides, angles, altitudes, medians, angle bisectors, area, radius of circumscribed and inscribed circle, sum a+b, perimeter and difference of the angles. All other elements, triangle visualization, and graphs of elements dependencies are also available.
trollhunter offers various tools to either analyze existing logfiles or monitor firewall activity in real time. Currently standard log messages generated by a Linux 2.4 kernel netfilter/iptables firewall are supported. You can choose from a Perl/Tk interface or run in commandline standard ASCII color TTY terminal.