|
List Of GNU Core Utilities Commands
This is a list of commands from the GNU Core Utilities for Unix environments. These commands can be found on Unix operating systems and most Unix-like operating systems. List See also * List of Unix commands * List of GNOME applications * List of GNU packages * List of KDE applications * List of Unix daemons * List of web browsers for Unix and Unix-like operating systems * Unix philosophy * util-linux is a standard package distributed by the Linux Kernel Organization for use as part of the Linux operating system. A fork, (with meaning "next generation"), was created when development stalled, but has been renamed back to , and is the offi ... References External links GNU Core Utilities homepage – configurable list of equivalent programs for *nix systems. – explains the names of many Unix commands. The UNIX System Homepage {{Unix commands Unix programs System administration ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GNU Core Utilities
The GNU Core Utilities or coreutils is a package of GNU software containing implementations for many of the basic tools, such as cat, ls, and rm, which are used on Unix-like operating systems. In September 2002, the ''GNU coreutils'' were created by merging the earlier packages ''textutils'', ''shellutils'', and ''fileutils'', along with some other miscellaneous utilities. In July 2007, the license of the GNU coreutils was updated from GPL-2.0-or-later to GPL-3.0-or-later. The GNU core utilities support long options as parameters to the commands, as well as the relaxed convention allowing options even after the regular arguments (unless the environment variable is set). Note that this environment variable enables a different functionality in BSD. See the List of GNU Core Utilities commands for a brief description of included commands. Alternative implementation packages are available in the FOSS ecosystem, with a slightly different scope and focus, or license. For exam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Device Node
A device is usually a constructed tool. Device may also refer to: Technology Computing * Device, a colloquial term encompassing desktops, laptops, tablets, smartphones, etc. * Device file, an interface of a device driver * Peripheral, any device attached to a computer that expands its functionality Warfare * Improvised explosive device (IED) * Nuclear weapon Other uses in technology * Appliance, a device for a particular task * Electronic component * Gadget * Machine * Medical device Arts, entertainment, and media Music Groups * Device (metal band), American industrial metal band active 2012–2014 * Device (pop-rock band), American pop-rock trio from the mid 1980s Albums * ''Device'' (Device album), 2013 * ''Device'' (Eon album), 2006 Other uses in arts, entertainment, and media * Plot device, as in storytelling * Rhetorical device, a technique used in writing or speaking * ''The Device'', a 2014 American science fiction horror film Other uses * Dev1ce or Device, nick ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Base32
Base32 is the base-32 numeral system. It uses a set of 32 digits, each of which can be represented by 5 bits (25). One way to represent Base32 numbers in a human-readable way is by using a standard 32-character set, such as the twenty-two upper-case letters A–V and the digits 0-9. However, many other variations are used in different contexts. The rest of this article discusses the use of Base32 for representing byte strings, not unsigned integer numbers, similar to the way Base64 works. This is an example of a Base32 representation using the previously described 32-character set (IPFS CIDv1 in Base32 upper-case encoding): Advantages Base32 has a number of advantages over Base64: # The resulting character set is all one case, which can often be beneficial when using a case-insensitive filesystem, DNS names, spoken language, or human memory. # The result can be used as a file name because it cannot possibly contain the '/' symbol, which is the Unix path separator. # The alp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BLAKE2b
BLAKE is a cryptographic hash function based on Daniel J. Bernstein's ChaCha stream cipher, but a permuted copy of the input block, XORed with round constants, is added before each ChaCha round. Like SHA-2, there are two variants differing in the word size. ChaCha operates on a 4×4 array of words. BLAKE repeatedly combines an 8-word hash value with 16 message words, truncating the ChaCha result to obtain the next hash value. BLAKE-256 and BLAKE-224 use 32-bit words and produce digest sizes of 256 bits and 224 bits, respectively, while BLAKE-512 and BLAKE-384 use 64-bit words and produce digest sizes of 512 bits and 384 bits, respectively. The BLAKE2 hash function, based on BLAKE, was announced in 2012. The BLAKE3 hash function, based on BLAKE2, was announced in 2020. History BLAKE was submitted to the NIST hash function competition by Jean-Philippe Aumasson, Luca Henzen, Willi Meier, and Raphael C.-W. Phan. In 2008, there were 51 entries. BLAKE made it to the final round consist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
B2sum
B, or b, is the second letter of the Latin-script alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''bee'' (pronounced ), plural ''bees''. It represents the voiced bilabial stop in many languages, including English. In some other languages, it is used to represent other bilabial consonants. History Old English was originally written in runes, whose equivalent letter was beorc , meaning "birch". Beorc dates to at least the 2nd-century Elder Futhark, which is now thought to have derived from the Old Italic alphabets' either directly or via Latin . The uncial and half-uncial introduced by the Gregorian and Irish missions gradually developed into the Insular scripts' . These Old English Latin alphabets supplanted the earlier runes, whose use was fully banned under King Canute in the early 11th century. The Norman Conquest popularised the Carolingian half-uncial forms which latt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Touch (command)
In computing, touch is a command used to update the access date and/or modification date of a computer file or directory. It is included in Unix and Unix-like operating systems, TSC's FLEX, Digital Research/Novell DR DOS, the AROS shell, the Microware OS-9 shell, and ReactOS. The command is also available for FreeDOS and Microsoft Windows. Overview In its default usage, it is the equivalent of creating or opening a file and saving it without any change to the file contents. touch avoids opening, saving, and closing the file. Instead it simply updates the dates associated with the file or directory. An updated access or modification date can be important for a variety of other programs such as backup utilities or the make command-line interface programming utility. Typically these types of programs are only concerned with files which have been created or modified after the program was last run. The touch command can also be useful for quickly creating files for programs or scri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sync (Unix)
sync is a standard system call in the Unix operating system, which commits all data in the kernel filesystem to non-volatile storage buffers, i.e., data which has been scheduled for writing via low-level I/O system calls. Higher-level I/O layers such as stdio may maintain separate buffers of their own. As a function in C, the sync() call is typically declared as void sync(void) in . The system call is also available via a command line utility also called ''sync'', and similarly named functions in other languages such as Perl and Node.js (in the fs module). The related system call fsync() commits just the buffered data relating to a specified file descriptor. fdatasync() is also available to write out just the changes made to the data in the file, and not necessarily the file's related metadata. Some Unix systems run a kind of ''flush'' or ''update'' daemon, which calls the ''sync'' function on a regular basis. On some systems, the cron daemon does this, and on Linux it was han ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shred (Unix)
is a command on Unix-like operating systems that can be used to securely delete files and devices so that it is extremely difficult to recover them, even with specialized hardware and technology; assuming it's even possible to recover the file at all. It is a part of GNU Core Utilities. Being based on the Gutmann method paper, it suffers from the same criticisms and possible shortcomings. Background For efficiency, the process of erasing a file from storage using the command usually only erases the file's file-system entry while keeping the content of the file intact. This frequently allows commonly available software to recover the "erased" file's data. If the file data is stored on magnetic media such as a HDD, even if the file is overwritten, residual magnetic fields may allow data recovery using specialist hardware equipment (this claim is disputed; see ). To prevent this, overwrites the contents of a file multiple times, using patterns chosen to maximize destru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rmdir
In computing, rmdir (or rd) is a command (computing), command which will remove an empty directory (file systems), directory on various operating systems. Implementations The command is available in Unix (e.g. macOS, Solaris (operating system), Solaris, AIX, HP-UX), Unix-like (e.g. FreeBSD, Linux), DOS, Digital Research FlexOS, IBM OS/2, Microsoft Windows or ReactOS operating systems. On MS-DOS, the command is available in versions 2 and later. DR DOS 6.0 also includes an implementation of the command. It is also available in the open source MS-DOS emulator DOSBox and in KolibriOS. The numerical analysis, numerical computing environments MATLAB and GNU Octave include an rmdir function with similar functionality. Usage Unix, Unix-like Normal usage is straightforward: rmdir name_of_directory where name_of_directory corresponds with the name of the directory one wishes to delete. There are options to this command such as -p in Unix which removes parent directories if they ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Device Nodes
A device is usually a constructed tool. Device may also refer to: Technology Computing * Device, a colloquial term encompassing desktops, laptops, tablets, smartphones, etc. * Device file, an interface of a device driver * Peripheral, any device attached to a computer that expands its functionality Warfare * Improvised explosive device (IED) * Nuclear weapon Other uses in technology * Appliance, a device for a particular task * Electronic component * Gadget * Machine * Medical device Arts, entertainment, and media Music Groups * Device (metal band), American industrial metal band active 2012–2014 * Device (pop-rock band), American pop-rock trio from the mid 1980s Albums * ''Device'' (Device album), 2013 * ''Device'' (Eon album), 2006 Other uses in arts, entertainment, and media * Plot device, as in storytelling * Rhetorical device, a technique used in writing or speaking * ''The Device'', a 2014 American science fiction horror film Other uses * Dev1ce or Device, nick ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rm (Unix)
rm (short for ''remove'') is a basic command on Unix and Unix-like operating systems used to remove objects such as computer files, directories and symbolic links from file systems and also special files such as device nodes, pipes and sockets, similar to the del command in MS-DOS, OS/2, and Microsoft Windows. The command is also available in the EFI shell. Overview The rm command removes references to objects from the filesystem using the unlink system call, where those objects might have had multiple references (for example, a file with two different names), and the objects themselves are discarded only when all references have been removed and no programs still have open handles to the objects. This allows for scenarios where a program can open a file, immediately remove it from the filesystem, and then use it for temporary space, knowing that the file's space will be reclaimed after the program exits, even if it exits by crashing. The command generally does not destroy f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
