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GNU Coreutils
The GNU Core Utilities or coreutils is a collection of GNU software that implements many standard, Unix-based shell commands. The utilities generally provide POSIX compliant interface when the environment variable is set, but otherwise offers a superset to the standard interface. For example, the utilities support long options and options after parameters. This environment variable enables a different functionality in BSD. Similar collections are available in the FOSS ecosystem, with a slightly different scope and focus (less functionality), or license. For example, BusyBox which is licensed under GPL-2.0-only, and Toybox which is licensed under 0BSD. Commands The commands implemented by coreutils are listed below. Throughout this article and customary for Unix-based systems, the term ''file'' refers to all file system items including regular files and special files such as directories. File utilities * chcon Changes file security context ( SELinux) * chgrp Changes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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GNU Project
The GNU Project ( ) is a free software, mass collaboration project announced by Richard Stallman on September 27, 1983. Its goal is to give computer users freedom and control in their use of their computers and Computer hardware, computing devices by collaboratively developing and publishing software that gives everyone the rights to freely run the software, copy and distribute it, study it, and modify it. GNU software grants these rights in GNU General Public License, its license. In order to ensure that the ''entire'' software of a computer grants its users all freedom rights (use, share, study, modify), even the most fundamental and important part, the operating system (including all its numerous utility programs) needed to be free software. Stallman decided to call this operating system ''GNU'' (a recursive acronym meaning "''GNU's not Unix!''"), basing its design on that of Unix, a proprietary operating system. According to its manifesto, the founding goal of the project w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Chgrp
, short for change group, is a shell command for changing the group associated with a Unix-based file system file including special files such as directories. Changing the group of a file is restricted to a super-user (such as via ) or to the file's owning user if the user is in the specified group. A file has access permissions for the owning user, a group and for others. Changing the group for a file changes access to it based on users' group memberships. History The command was originally developed as part of the Unix operating system by AT&T Bell Laboratories. It is available in most Unix-like systems, Plan 9, Inferno and IBM i. The version of chgrp bundled in GNU coreutils was written by David MacKenzie. Use Generally, the syntax can be described as: chgrp 'options''''group'' ''files'' * ''group'' specifies the group with which the files should be associated; may be either a symbolic name or an identifier An identifier is a name that identifies (that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Mktemp
mktemp is a command available in many Unix-like operating systems that creates a temporary file or directory. Originally released in 1997 as part of OpenBSD 2.1, a separate implementation exists as a part of GNU Coreutils. There used to be a similar named C library function, which is now deprecated for being unsafe, and has safer alternatives. See also * Filesystem Hierarchy Standard * Temporary folder * TMPDIR * Unix filesystem In Unix and operating systems inspired by it, the file system is considered a central component of the operating system. It was also one of the first parts of the system to be designed and implemented by Ken Thompson in the first experimental ... References Unix software 1997 software {{unix-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Device Node
A device is usually a constructed tool. Device may also refer to: Technology Computing, electronics, mechanisms and telecommunication * Appliance, a device for a particular task * Computer, a computing device * Device file, an interface of a peripheral device driver * Electronic component, a device that can be embedded in the construction of electronic hardware * Gadget, generally synonymous with device; often used when a more specific word is not well-known or cannot be recalled * Handheld device, a small computer such as a phone or tablet * Machine, a mechanical device * Medical device, a device intended for medical use * Peripheral device, hardware that is external but accessible to a computer Weapons * Improvised explosive device (IED) * Nuclear weapon 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), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Mknod
In Unix-like operating systems, a device file, device node, or special file is an interface to a device driver that appears in a file system as if it were an ordinary file. There are also special files in DOS, OS/2, and Windows. These special files allow an application program to interact with a device by using its device driver via standard input/output system calls. Using standard system calls simplifies many programming tasks, and leads to consistent user-space I/O mechanisms regardless of device features and functions. Overview Device files usually provide simple interfaces to standard devices (such as printers and serial ports), but can also be used to access specific unique resources on those devices, such as disk partitions. Additionally, device files are useful for accessing system resources that have no connection with any actual device, such as data sinks and random number generators. There are two general kinds of device files in Unix-like operating systems, k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Mkdir
(make directory) command (computing), command in the Unix, DOS, Digital Research, DR FlexOS, IBM OS/2, Microsoft Windows, and ReactOS operating systems is used to make a new directory (file systems), directory. It is also available in the Unified Extensible Firmware Interface, EFI shell and in the PHP scripting language. In DOS, OS/2, Windows and ReactOS, the command is often abbreviated to md. The command is analogous to the Stratus Technologies, Stratus Stratus VOS, OpenVOS create_dir command. MetaComCo TRIPOS and AmigaDOS provide a similar MakeDir command to create new directories. The numerical analysis, numerical computing environments MATLAB and GNU Octave include an mkdir function with similar functionality. History In early versions of Unix (Berkeley Software Distribution, 4.1BSD and early versions of System V), this command had to be setuid superuser, root as the kernel (operating system), kernel did not have an mkdir syscall. Instead, it made the directory with mknod a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Ln (Unix)
is a shell command for creating a link file to an existing file or directory. By default, the command creates a hard link, but with the command line option, it creates a symbolic link. Most systems disallow a hard link to a directory since such links could disrupt the structure of a file system and interfere with the operation of other utilities. The command can create a symbolic link to non-existent file. The command appeared in Issue 2 of the X/Open Portability Guidelines. The version in GNU Core Utilities was written by Mike Parker and David MacKenzie. The command is available in Windows via UnxUtils and has been ported to IBM i. Links A link allows more than one path to refer to the same file. A hard link is a directory entry that refers to a file's inode (an internal reference). A file can have multiple hard links each referring to the same inode. Creating a hard link does not copy the contents of the file; but merely causes another name to be associated with the sam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Install (Unix)
The command is a Unix program used to copy Computer file, files and set file permissions. Some implementations offer to invoke while installing Executable, executable files. The command is not defined in POSIX. It has mostly split into two camps in terms of compatibility, a GNU type and a Berkeley Software Distribution, BSD type. The main incompatibility lies in the definition of options and . The command is available as a separate package for Microsoft Windows as part of the UnxUtils collection of Native (computing), native Windows API, Win32 porting, ports of common GNU Unix-like utilities. References External links * * installin busybox aninstall in toybox (both GNU-like) Unix file system-related software Command-line software {{Unix-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Df (Unix)
df, short for ''disk free'', is a shell command for reporting the amount of available storage space on file systems on which the user has read access. is typically implemented using the or system calls. The Single Unix Specification (SUS) specifies that space is reported in blocks of 512 bytes, and that at a minimum, it reports the file system names and the amount of free space. Using 512-bytes as the unit of measure is a historical practice and maintains compatibility with ls and other commands. Notably, the file system need not be constrained to internally use 512-byte blocks. The option was added as a compromise measure. It was agreed by the standard developers that 512 bytes was the best default unit because of its complete historical consistency on System V (versus the mixed 512/1024-byte usage on BSD systems), and that a option to switch to 1024-byte units was a good compromise. Users who prefer the more logical 1024-byte quantity can use alias to map to without b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Dd (Unix)
dd is shell command for reading, writing and converting file data. Originally developed for Unix, it has been implemented on many other environments including Unix-like operating systems, Windows, Plan 9 and Inferno. The command can be used for many purposes. For relatively simple copying operations, it tends to be slower than domain-specific alternatives, but it excels at overwriting or truncating a file at any point or seeking in a file. The command supports reading and writing files, and if a driver is available to support file-like access, the command can access devices too. Such access is typically supported on Unix-based systems that provide file-like access to devices (such as storage) and special device files (such as /dev/zero and /dev/random). Therefore, the command can be used for tasks such as backing up the boot sector of a drive, and obtaining random data. The command can also support converting data while copying; including byte order swapping and conve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |