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Movements, leaders, victories and the continuing fight for equality.
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Explore the people, places, events, achievements, struggles and stories that shaped our journey.
Movements, leaders, victories and the continuing fight for equality.
Innovation, patents, science, technology and world-changing contributions.
Pioneers, champions, Negro Leagues, records, activism and excellence.
Meet the people whose lives, choices and achievements shaped the journey.
Black towns, communities, institutions and places where history happened.
Moments that changed communities, movements, institutions and the nation.
In 1968 Shirley Chisholm became the first Black woman elected to the United States Congress. In 1972 she launched a campaign for the Democratic presidential nomination, breaking another political barrier.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
In some operating systems, the null device is a device file that discards all data written to it but reports that the write operation succeeded. This device is called /dev/null on Unix and Unix-like systems, NUL: (see TOPS-20) or NUL on CP/M and DOS (internally \DEV\NUL), nul on OS/2 and newer Windows systems[1] (internally \Device\Null on Windows NT), NIL: on Amiga operating systems,[2] and NL: on OpenVMS.[3] In Windows Powershell, the equivalent is $null.[4] It provides no data to any process that reads from it, yielding EOF immediately.[5] In IBM operating systems DOS/360 and successors[a] and also in OS/360 and successors[b] such files would be assigned in JCL to DD DUMMY.
In programmer jargon, especially Unix jargon, it may also be called the bit bucket[6] or black hole.
/dev/null is described as an empty regular file in Version 4 Unix.[7]
The Version 5 Unix manual describes a /dev/null device with modern semantics.[8]
The null device is typically used for disposing of unwanted output streams of a process, or as a convenient empty file for input streams. This is usually done by redirection. For example, tar -c -f /dev/null "example directory" can be used to dry-run the TAR file archiving utility to see if any errors would occur but without writing any file.
The /dev/null device is a special file, not a directory, so one cannot move a whole file or directory into it with the Unix mv command.
Unix shell command cat /dev/null would do nothing, equivalent to true or : command.
This entity is a common inspiration for technical jargon expressions and metaphors by Unix programmers, e.g. "please send complaints to /dev/null", "my mail got archived in /dev/null", and "redirect to /dev/null"—being jocular ways of saying, respectively: "don't bother sending complaints", "my mail was deleted", and "go away". The iPhone Dev Team commonly uses the phrase "send donations to /dev/null", meaning they do not accept donations.[9] The fictitious person name "Dave (or Devin) Null" is sometimes similarly used (e.g., "send complaints to Dave Null").[10] In 1996, Dev Null was an animated virtual reality character created by Leo Laporte for MSNBC's computer and technology TV series The Site. Dev/null is also the name of a vampire hacker in the computer game Vampire: The Masquerade – Redemption. A 2002 advertisement for the Titanium PowerBook G4 reads "Sends other UNIX boxes to /dev/null."[11]
The null device is also a favorite subject of technical jokes,[12] such as warning users that the system's /dev/null is already 98% full. The 1995 April Fool's issue of the German magazine c't reported on an enhanced /dev/null chip that would efficiently dispose of the incoming data by converting it to a flicker on an internal glowing LED.
Dev/Null is also the name of an electronic dance music producer and jungle DJ.[13]
Source: Wikipedia. Article content is retrieved live through the MediaWiki API.
Amiga Unix (informally known as Amix) is a discontinued full port of AT&T Unix System V Release 4 operating system developed by Commodore-Amiga, Inc. in 1990 for the Amiga computer family as an alternative to AmigaOS, which shipped by default.
The Amiga 3000UX is a model of the Amiga computer family that was released with Amiga Unix, a full port of AT&T Unix System V Release 4 (SVR4), installed along with AmigaOS. The system is otherwise equivalent to the standard A3000, once a right-click initiates a boot to Kickstart (Amiga's kernel). Sun Microsystems and Unix International featured the Amiga 3000UX on their stands at the 1991 Uniforum event, ostensibly to promote Commodore's adoption of those exhibitors' technologies, specifically OPEN LOOK and SVR4. This may have led to unsubstantiated rumours about Sun potentially incorporating the model into its workstation range, sustained by persistent community perceptions of Commodore's managerial incompetence. It is possible that Commodore (or a third party) repurposed A3000UX machines for standard AmigaOS, as some standard A3000 models have been found with labeling suggesting they were originally to be sold as A3000UX machines.
The software program VICE, standing for VersatIle Commodore Emulator, is a free and cross platform emulator for Commodore's 8-bit computers. It runs on Linux, Amiga, Unix, MS-DOS, Win32, macOS, OS/2, RISC OS, QNX, GP2X, Pandora, Dingoo A320, Syllable, and BeOS host machines. VICE is free software, released under the GNU General Public License since 2004. VICE for Microsoft Windows (Win32) prior to v3.3 were known as WinVICE, the OS/2 variant is called Vice/2, and the emulator running on BeOS is called BeVICE.
In some operating systems, the null device is a device file that discards all data written to it but reports that the write operation succeeded. This device is called /dev/null on Unix and Unix-like systems, NUL: (see TOPS-20) or NUL on CP/M and DOS (internally \DEV\NUL), nul on OS/2 and newer Windows systems (internally \Device\Null on Windows NT), NIL: on Amiga operating systems, and NL: on OpenVMS. In Windows Powershell, the equivalent is $null. It provides no data to any process that reads from it, yielding EOF immediately. In IBM operating systems DOS/360 and successors and also in OS/360 and successors such files would be assigned in JCL to DD DUMMY. In programmer jargon, especially Unix jargon, it may also be called the bit bucket or black hole.
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →Mae Jemison, aboard Space Shuttle Endeavour in 1992.
