GNU Recutils is a set of tools and libraries to access human-editable, plain text databases called recfiles. The data is stored as a sequence of records, each record containing an arbitrary number of named fields. The picture below shows a sample database containing information about GNU packages, along with the main features provided by Recutils. A video with a talk introducing the program can be
GNU datamash GNU datamash is a command-line program which performs basic numeric, textual and statistical operations on input textual data files. Examples: calculate the sum and mean of values 1 to 10: $ seq 10 | datamash sum 1 mean 1 55 5.5 group text file by one column and calculate mean and sample standard deviation on another, with automatic sorting and header line processing: $ datamash --sor
Introduction GNU GRUB is a Multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn. Briefly, a boot loader is the first software program that runs when a computer starts. It is responsible for loading and transferring control to the operating system kernel software (such as the Hurd or Linux). The kernel, i
Ddrescue - Data recovery tool [ English | Español | Français | Italiano | Russkii ] Introduction GNU ddrescue is a data recovery tool. It copies data from one file or block device (hard disc, cdrom, etc) to another, trying to rescue the good parts first in case of read errors. Ddrescuelog is a tool that manipulates ddrescue mapfiles, shows mapfile contents, converts mapfiles to/from other formats,
GNU libsigsegv GNU libsigsegv is a library for handling page faults in user mode. A page fault occurs when a program tries to access to a region of memory that is currently not available. Catching and handling a page fault is a useful technique for implementing: pageable virtual memory, memory-mapped access to persistent databases, generational garbage collectors, stack overflow handlers, distribu
GNU parallel is a shell tool for executing jobs in parallel using one or more computers. A job can be a single command or a small script that has to be run for each of the lines in the input. The typical input is a list of files, a list of hosts, a list of users, a list of URLs, or a list of tables. A job can also be a command that reads from a pipe. GNU parallel can then split the input and pipe
GNU cflow GNU cflow analyzes a collection of C source files and prints a graph, charting control flow within the program. GNU cflow is able to produce both direct and inverted flowgraphs for C sources. Optionally a cross-reference listing can be generated. Two output formats are implemented: POSIX and GNU (extended). The package also provides Emacs major mode for examining the produced flowcharts
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