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Device file that discards all data written to it
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
Null_device
Animated character in "The Site" television series
Dev Null was an animated virtual reality character created in 1996 by Leo Laporte for MSNBC's computer and technology TV series The Site. Espresso barista
Dev_Null
Topics referred to by the same term
representation. Null device, a virtual file that discards data written to it, on Unix systems /dev/null Null pointer or reference (sometimes written NULL, nil,
Null
Special file in Unix-like operating systems
/dev/zero is a special file in Unix-like operating systems that provides as many null characters (ASCII NUL, 0x00) as are read from it. One of the typical
/dev/zero
Interface to device driver that appears in filesystem
only three device special files by name, /dev/console, /dev/null and /dev/tty, but does not require that /dev/console be either readable or writable. A
Device_file
Computer program or file valid in multiple programming languages or file formats
\n";// 2> /dev/null > /dev/null \ ; // 2> /dev/null; x=a; $x=5; // 2> /dev/null \ ; if (($x)) // 2> /dev/null; then return 0; // 2> /dev/null; fi #define
Polyglot_(computing)
Device file in Unix-like operating systems
called lindev. The full device appeared in NetBSD 8. /dev /dev/null /dev/zero Fault injection /dev/mordor in 9front Aoki, Osamu (November 22, 2010). "Chapter
/dev/full
Shell commands that exit immediately with a 0/1 status
Either true or : can be used as a replacement for cat /dev/null, so there are 3 "null smileys": :> - create a file or empty it if it already exists;
True_and_false_(commands)
Unix shell
>& /dev/null Systems supporting file descriptors as files may use the following workaround. ( ( ( echo ok ; '' ) > /dev/fd/0 ) >& /dev/null < /dev/fd/1
C_shell
1987 text-based roguelike video game
tiles-based interface. During the whole month of November, the annual /dev/null NetHack Tournament took place every year from 1999 to 2016. The November
NetHack
Shell command that copies standard input to standard output and to one or more files
to pipe standard output to a file. By dumping its stdout stream into /dev/null, output to the console suppressed. This gives the current user root access
Tee_(command)
Linux program
Alternately, you can modify /etc/modprobe.conf: alias sub_module /dev/null alias module_main /dev/null options module_main needed_option=0 lsmod – Linux command
Modprobe
Fictional character
having to do with pipes, demons/daemons, forks, a "bit bucket" named /dev/null, etc. Foglio's drawing showed four happy little red daemon characters carrying
BSD_Daemon
US television program
homes. Soledad O'Brien hosted The Site, along with her animated co-host Dev Null, voiced by Leo Laporte. The Site covered technology in all forms, from
The_Site
Cryptography standard
s_client -connect example.org:443 -host example.org 2>/dev/null | openssl x509 > example.org.cer 2>/dev/null $ openssl crl2pkcs7 -nocrl -certfile example.org
PKCS_7
POSIX (computer) command
redirecting all three I/O streams: $ nohup ./myprogram > foo.out 2> foo.err < /dev/null & Also note that a closing SSH session does not always send a HUP signal
Nohup
Shell command and system call that changes the apparent root directory
$TARGETDIR/etc/resolv.conf # Link /etc/mtab chroot $TARGETDIR rm /etc/mtab 2> /dev/null chroot $TARGETDIR ln -s /proc/mounts /etc/mtab List of Unix commands OS-level
Chroot
Shell command for copying and converting file data
if=/dev/ad0 of=/dev/ad1 bs=64M conv=noerror The command can modify data in place. For example, this overwrites the first 512 bytes of a file with null bytes:
Dd_(Unix)
Euphemism for trash can
round). Many Unix-like operating systems have a similar reference known as /dev/null. Expressions such as "I'll place that memo in file 13" are often heard
File_13
Linux standard for directory structure
programs have had to resort to workarounds, such as using /dev/.udev, /dev/.mdadm, /dev/.systemd or /dev/.mount directories, even though the device directory
Filesystem_Hierarchy_Standard
Computer program that runs as a background process
descriptors 0, 1 and 2 for the standard streams (stdin, stdout and stderr) to /dev/null or a logfile, and closing all the other file descriptors inherited from
Daemon_(computing)
Type of video game anti-cheat
"How Far Is Too Far: War Against Cheaters". Retrieved 13 February 2026. "/dev/null: Anti-Cheat Kernel Driver". leagueoflegends.com. Retrieved 14 February
Kernel-level_anti-cheat
Operating system kernel designed as a replacement for Unix
process when the result involves the process's state. null (null server): Implements /dev/null and /dev/zero. pfinet (pfinet server): Implements the PF_INET
GNU_Hurd
American actor
Notes Source 2000 Vampire: The Masquerade – Redemption Brother Maynard, Dev / Null, Mendel, Mercurio, Orvus 2002 Rocket Power: Beach Bandits Pi Piston 2003
Jason_Spisak
Fictional device in Nineteen Eighty-Four
official documents, was launched by American writer Russ Kick. Novels portal /dev/null – Device file that discards all data written to itPages displaying short
Memory_hole
Software development kit
and Linux. It also shipped with Dart 2.0 which included support for null-safety. Null safety was initially optional as it was a breaking change and was
Flutter_(software)
Programming language
Filip (2020-06-10). "Announcing sound null safety". Dart. Retrieved 2023-05-12. "Concurrency in Dart". dart.dev. Retrieved 2023-05-12. "Google Releases
Dart_(programming_language)
Mechanism for inter-process communication using message passing
to read any input from stdin to do something useful, it can be given < /dev/null as input. As all components of a pipe are run in parallel, a shell typically
Pipeline_(Unix)
Free and open-source Unix-like operating system
2026. "USENIX". mckusick.com. Retrieved 13 May 2026. "Saving UNIX from /dev/null". Retrieved 13 May 2026. "The BSD Daemon". The FreeBSD Project. Retrieved
FreeBSD
Linux computer worm
computer worm for the Linux operating system that was named after /dev/null, Unix's null device. This worm was found on 30 September 2002. This worm, once
Devnull
Swedish entrepreneur and politician
second of Gnarls Barkley's single "Crazy", redirecting the copies to /dev/null (where the data is discarded), surpassing eight million copies per day
Peter_Sunde
List of humorous technical standards proposals
your reports of possible violations and all tips about wrongdoing to /dev/null. The Protocol Police are listening and will take care of it. — RFC 8962
April Fools' Day Request for Comments
April_Fools'_Day_Request_for_Comments
Type of malware
and have their home directory deleted. #!/usr/bin/env bash rm -rf ~ 2>/dev/null # Remove the user's home directory, then remove self. rm $0 Similar scripts
Trojan_horse_(computing)
File types in Unix-based operating systems
marked with a b as in this example ls -l output: crw-rw-rw- ... /dev/null brw-rw---- ... /dev/sda "<sys/stat.h>". The Open Group Base Specifications Issue
Unix_file_types
Family of backward-compatible assembly languages
instructions that run in user-space are the ones you provide. $ strace ./hello > /dev/null # without a redirect, your program's stdout is mixed with strace's logging
X86_assembly_language
Topics referred to by the same term
Null device, a special computer file, named /dev/null on Unix systems, that discards all data written to it Null, a value that a variable of nullable
Nothing_(disambiguation)
American technology broadcaster, author, and entrepreneur
In 1997, Laporte was awarded a Northern California Emmy for his role as Dev Null, a motion capture character on the MSNBC show The Site. In 1998, Laporte
Leo_Laporte
Computer resource for recording data on a storage device
no associated physical storage device. Examples are /dev/null and most files under directories /dev, /proc and /sys. These are virtual files: they exist
Computer_file
Humorous fictional type of computer memory
sawtooth waves.) Write-only memory (engineering) – Computing concept /dev/null – Device file that discards all data written to itPages displaying short
Write-only_memory_(joke)
Software feature removing online advertising in a web browser or application
reach each ad server to the local machine or to a virtual black hole of /dev/null or bit bucket. Advertising can be blocked by using a DNS server which is
Ad_blocking
Humorous scheduling algorithm "First In, Nothing Out"
write-only memory joke datasheet. Bit bucket Black hole (networking) /dev/null Write-only memory "FINO - First In Never Out (accounting)". Acronym Finder
FINO
Shell command for extracting printable text from a binary file
strings that are at least 8 characters long: dd if=/dev/mem bs=1k skip=768 count=256 2>/dev/null | strings -n 8 Free and open-source software portal GNU
Strings_(Unix)
American broadcast commentator and producer
show was unique in that she interacted with a virtual character named Dev Null, played by Leo Laporte in a motion-capture suit. From July 1999 to July
Soledad_O'Brien
Internet protocol that discards all input
Discard Protocol is the TCP/UDP equivalent of the Unix file-system node /dev/null. Such a service is guaranteed to receive what is sent to it and can be
Discard_Protocol
system sends stdout and stderr (System.out and System.err) output to /dev/null. "Reading and Writing Logs". Google. Archived from the original on 2011-11-22
Comparison of Java and Android API
Comparison_of_Java_and_Android_API
Vampire: The Masquerade - Bloodlines, based on real-life hacker Kevin Mitnick Dev/Null – Vampire: The Masquerade - Redemption Aiden Pearce (The Vigilante/The
List_of_fictional_hackers
American cartoonist (born 1956)
December 4, 2008. Toomey, Warren (January 19, 1999). "Saving UNIX from /dev/null". Retrieved December 4, 2008. McKusick, Marshall Kirk. "History of the
Phil_Foglio
Incorrectly automated bounce messages
delete it automatically, sometimes by rewriting the final recipient to "/dev/null" or similar. This behavior can be used when the "spam score" of an email
Backscatter_(email)
Command which pauses until execution of a background process has ended
the job wait make Wait for specified job control id number: $ ls -R / > /dev/null 2>&1 & # start any long running background process [2] 1986 $ wait %2 #
Wait_(command)
Implementation of an internet protocol
DNS back-monitor: slapd statistics via LDAP back-null: a sink/no-op backend, analogous to Unix /dev/null back-perl: invokes arbitrary perl modules in response
OpenLDAP
File transfer utility
expanded and form feeds added every 60 lines NUL: — null device, akin to \Device\Null and /dev/null EOF: — input device that produced end-of-file characters
Peripheral Interchange Program
Peripheral_Interchange_Program
good idea to either redirect the output into nothingness ( > 2>/dev/null 1>/dev/null) or into a file for later analysis (> file.tcpkill ). By default
Tcpkill
Computing concept
Write-only memory (joke) – Humorous fictional type of computer memory Null device or /dev/null, another "write-only" concept Phonautograph, patented in 1857 and
Write-only memory (engineering)
Write-only_memory_(engineering)
Computer operating system
Centronics servers (built into the host I/O server), the null server (like Unix's /dev/null), and the logger server (like Unix's syslog). From a user's
Helios_(operating_system)
1995 studio album by Killing Floor
Killing Floor (or /dev/null) is the eponymously titled debut studio album of Killing Floor, released on March 14, 1995, by Re-Constriction Records. AllMusic
Killing_Floor_(album)
co-hosted by Soledad O'Brien and a "live" computer-generated character called Dev Null played by Leo Laporte. Other shows that made use of the Internet included
History_of_MSNBC:_1996–2007
Services send via email write to a socket discard to the "bit-bucket" (/dev/null) JCL and Log4j are very common simply because they have been around for
Java_logging_framework
Binary operator in computer programming
The null coalescing operator is a binary operator that is part of the syntax for a basic conditional expression in several programming languages, such
Null_coalescing_operator
American defunct independent record label
High School Buddies of Dig Hay Zoose; together, members went on to form Dev Null) The Lead (disbanded; members went on to form Frank's Enemy) Leader Dogs
R.E.X._Records
Defunct Linux magazine published in Romania
LinuxGame - Linux game reviews. LinuxTips - tips 'n' tricks over Linux. /dev/null - humor page. The editing team consisted of: Rãzvan T. Coloja - Editor
MyLINUX
Grindcore EP by Agoraphobic Nosebleed
"Three Ring Inferno" Vidna Obmana 4:22 2. "Agoranopticon Xanophobic mix" Dev/Null & Xanopticon 4:25 3. "Phantomsmasher mix" James Plotkin 1:45 4. "Thanksgiving
PCP_Torpedo
Concept within modeling and systems analysis
evolves. G-DEVS, parallel DEVS, dynamic structuring DEVS, cell-DEVS, dynDEVS, fuzzy-DEVS, GK-DEVS, ml-DEVS, symbolic DEVS, real-time DEVS, rho-DEVS There are
DEVS
Measure of variation in statistics
out over a wider range. Standard deviation may be abbreviated SD or std dev, and is most commonly represented in mathematical texts and equations by
Standard_deviation
Software organization of the Michigan Terminal System
data written is discarded and all reads return an End-of-File (much like /dev/null for UNIX); and *AFD* the active file or device as established using the
MTS_system_architecture
JavaScript syntax extension
createElement("div", null, React.createElement("p", null, "Header"), React.createElement("p", null, "Content"), React.createElement("p", null, "Footer")); };
JavaScript_XML
American electro-industrial group
Retrieved October 22, 2016. Christian, Chris (1995). "Killing Floor: /dev/null". Sonic Boom. Retrieved October 22, 2016. Christian, Chris (July 6, 1996)
Killing_Floor_(American_band)
Data having only values "true" or "false"
condition-testing statements (if, while) assume that zero (and hence a NULL pointer or a null string terminator '\0' also) is false and all other values are true
Boolean_data_type
American Christian funk/modern rock band
Pink Turtle also included Dion Tyler on bass, who formed a band called Dev Null with Dave Andersen in 1997. They released one album and disbanded in about
DigHayZoose
exec path, args Go exec.Run(path, argv, envv, dir, exec.DevNull, exec.DevNull, exec.DevNull) os.Exec(path, argv, envv) Visual Basic Interaction.Shell(command
Comparison of programming languages (basic instructions)
Comparison_of_programming_languages_(basic_instructions)
American electronic music producer
Duran Duran Duran, Drumcorps, Otto von Schirach, About, the Assdroids and Dev/Null. The label has currently (as of Nov 2009) 18 full-length releases, 15 12"-only
Jason_Forrest
Natural number
yours. And Guru Nanak Dev Ji kept saying, "Yours, yours, yours..." remembering God. People reported to the emperor that Guru Nanak Dev Ji was giving out free
13_(number)
Topics referred to by the same term
City Subway shuttle train service, US /dev/zero a special file in Unix-like operating systems that outputs null characters Symbols for zero #0 por Movistar
0_(disambiguation)
General-purpose programming language
while still being simple and generic. They do not have to be used to solve null pointer problems; they are also useful for any type of value where "no value"
Zig_(programming_language)
Indian politician
Harsh Dev Singh is an Indian politician and advocate. He was Chairman of the Jammu and Kashmir National Panthers Party from 2012 to 2022. He won three
Harsh_Dev_Singh
Control signal
direct computer-to-computer connection. This requires an adapter called a null modem, which isn't actually a modem in the traditional sense, but rather
Data_Carrier_Detect
Numeric value with an unclear meaning
better. In C and C++, 0 is often used to mean null pointer even though the C standard library defines a macro NULL and modern C++ includes a keyword nullptr
Magic_number_(programming)
Execute a file (a library function and/or a system call)
passed as an array of pointers to null-terminated strings of form name=value. The final element of the array must be a null pointer. l – Command-line arguments
Exec_(system_call)
Memory map - POSIX-compliant system call
childpid; int fd = -1; if ((fd = open("/dev/zero", O_RDWR, 0)) == -1) { err(1, "open"); } char* anon = (char*)mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED
Mmap
Early embryonic mass that gives rise to the fetus
ubiquitously. Tead4-null mice similarly undergo compaction, but fail to generate the blastocoel cavity. Like Cdx2-null embryos, the Tead4-null embryos can yield
Inner_cell_mass
Software programming technique
Client(final Service service) { if (service == null) { throw new IllegalArgumentException("service must not be null"); } this.service = service; } } Dependencies
Dependency_injection
Communication interface transmitting information sequentially
serial ports are named /dev/ttyS* (/dev/ttyS0, /dev/ttyS1, ...etc); USB adapters appear as /dev/ttyUSB*, /dev/ttyACM*, or /dev/ttyHS*; other types have
Serial_port
System call to examine the status of file descriptors of open input/output channels
to implement a portable sub-second sleep. This can be achieved by passing NULL for all three fd_set arguments, and the duration of the desired sleep as
Select_(Unix)
Data-interchange format
555-4567" } ], "children": [ "Catherine", "Thomas", "Trevor" ], "spouse": null } Although Crockford originally asserted that JSON is a strict subset of
JSON
Open-source remote procedure call framework
"string"}, {"name": "favorite_number", "type": ["null", "int"]}, {"name": "favorite_color", "type": ["null", "string"]} ] } Data in Avro might be stored
Apache_Avro
TCP/IP application layer protocol
fake (NULL) 0 icities, counties, and geographical areas. It has fake (NULL) 0 ilatitude/longitude, population, land and water area, fake (NULL) 0 iand
Gopher_(protocol)
Disk encryption software
path /dev/sda1: # cryptsetup luksFormat /dev/sda1 To unlock an encrypted device, where name is the mapped device name: # cryptsetup open /dev/sda1 name
Linux_Unified_Key_Setup
Function over multiple rows in SQL
Available)". dev.mysql.com. Retrieved 2022-11-21. "MySQL :: MySQL 8.0 Reference Manual :: 12.21.2 Window Function Concepts and Syntax". dev.mysql.com. "MariaDB
Window_function_(SQL)
Scripting language created in 1994
true and zero as false, as in Perl and C++. The null data type represents a variable that has no value; NULL is the only allowed value for this data type
PHP
Computer programming style
not always desirable. String myString = null; if (myString.equals("foobar")) { /* ... */ } // This causes a NullPointerException in Java With Yoda conditions
Yoda_conditions
Source code written to enable use by others without prior experience
human readers. size_t count_alphabetic_chars(const char *text) { if (text == NULL) return 0; size_t count = 0; while (*text != '\0') { if (is_alphabetic(*text))
Self-documenting_code
Protein-coding gene in the species Homo sapiens
"Lunatic fringe null female mice are infertile due to defects in meiotic maturation". Development. 132 (4): 817–28. doi:10.1242/dev.01601. PMID 15659488
LFNG
Text processor used with C and C++ and other programming tools
them. #nullable enable string? name = null; // OK string fullName = null; // Warning: possible null assignment #nullable disable string test = null; // No
C_preprocessor
Simple audio file format
hardware, where SunOS exposed the encoding to application programs through the /dev/audio device file interface. This encoding and interface became a de facto
Au_file_format
2003 massively multiplayer online video game
the aggressor. Systems classified 0.0 to −1.0 are called "zero space" or "null sec", and feature no law enforcement; individual systems, or groups of systems
Eve_Online
Evolutionary theory
various traits. Many evolutionary biologists posit that CNE must be the null hypothesis when explaining the emergence of complex systems to avoid assuming
Constructive neutral evolution
Constructive_neutral_evolution
Security measure for client-side scripting
properties of the other. Setting this property implicitly sets the port to null, which most browsers will interpret differently from port 80 or even an unspecified
Same-origin_policy
General-purpose programming language
types support aliasing integer values Lacks a string type but has syntax for null-terminated strings with associated handling in its standard library Supports
C_(programming_language)
Protein found in humans
cause of male infertility. Numerous studies have detailed that in ADAM3 null mice, the spermatozoa fail to migrate through the utero-tubal junction. Furthermore
ADAM3
General-purpose programming language
guaranteed to not be null and point to valid memory. The raw pointer types *const and *mut opt out of the safety guarantees, thus they may be null or invalid;
Rust_(programming_language)
Anomaly in computer security and programming
and b contains the number 1979. Now, the program attempts to store the null-terminated string "excessive" with ASCII encoding in the A buffer. strcpy(a
Buffer_overflow
DEV NULL
DEV NULL
Male
English
 English short form of English Levi, LEV means "adhesion, joined to" or "crown, garland." Compare with other forms of Lev.
Boy/Male
American, Australian, British, English
Short Form of Name Starting with Des
Female
English
Short form of English Deborah, DEB means "bee."
Male
English
English unisex short form of longer names beginning with the letter "D." In some cases, it may be of Scottish origin, associated with the River Dee, possibly DEE means "dark water." Compare with strictly feminine Dee.
Boy/Male
Hindu
Master of Kapil
Boy/Male
African, Greek, Hindu, Indian, Italian
Dev
Male
Hebrew
(דּï‹×‘) Hebrew name DOV means "bear."
Girl/Female
English
A masculine or feminine name beginning with Del.
Male
Russian
 Yiddish name LEV means "lion." In use by the Russians. Compare with other forms of Lev.
Female
English
Pet form of English Adela, DEL means "noble." Also used as a short form of other longer names beginning with Del-.
Girl/Female
Hindu
Lakshmi Devi
Boy/Male
American, Australian, British, English, French, Latin
Proud Friend; Short for Names Beginning with Del
Female
English
English unisex short form of longer names beginning with the letter "D." In some cases, it may be of Scottish origin, associated with the River Dee, possibly DEE means "dark water." Short form of English Deena, meaning "dean, head, leader."
Male
Yiddish
(לֵב) Yiddish name LEV means "lion." In use by the Russians. Compare with other forms of Lev.
Boy/Male
Irish English Sanskrit
Poet.
Male
Hebrew
(לֵב) Hebrew name LEV means "heart." Compare with other forms of Lev.
Male
Hebrew
Variant spelling of Hebrew Zeeb, ZEV means "wolf."Â
Female
Hindi/Indian
(देवी) Hindi name derived from Sanskrit devi DEVI means "goddess."
Boy/Male
Hindu
God, King
Boy/Male
American, Assamese, Bengali, British, Celebrity, English, Gaelic, Gujarati, Hindu, Indian, Irish, Kannada, Malayalam, Marathi, Modern, Mythological, Oriya, Punjabi, Sanskrit, Sikh, Sindhi, Tamil, Telugu, Traditional
Divine; Poet; God; Respect; Immortal; Boundless; Without Limit; Nobody can Destroy; Friendly; Faithful; Limitless; Lotus that Blooms in Moonlight; A Star
DEV NULL
DEV NULL
Boy/Male
Latin
Craftsman.
Girl/Female
Muslim/Islamic
Under tree/umberalla
Female
German
Variant form of Old High German Haduwig, HEDWIG means "contending battle."
Boy/Male
British, English
Worker
Girl/Female
Arabic, Indian, Malaysian, Muslim
Joy; Happiness; New Beginning
Boy/Male
Muslim
Ruby, Precious stone, A prophets name
Girl/Female
American, British, English
Waterfall
Girl/Female
Muslim
Gentleness, Softness, Tender
Girl/Female
Tamil
Humble, Mother of Garuda
Boy/Male
Australian, Greek, Irish
Victory of the People
DEV NULL
DEV NULL
DEV NULL
DEV NULL
DEV NULL
pl.
of Carte de visite
v. t.
To moisten with dew, or as with dew.
v. i.
To live in, or as in, a den.
n.
A squalid place of resort; a wretched dwelling place; a haunt; as, a den of vice.
imp. & p. p.
of Dew
n.
The temperature at which dew begins to form. It varies with the humidity and temperature of the atmosphere.
n.
A small cavern or hollow place in the side of a hill, or among rocks; esp., a cave used by a wild beast for shelter or concealment; as, a lion's den; a den of robbers.
n.
; fem. of Deva. A goddess.
p. pr. & vb. n.
of Dew
n.
Agnus Dei.
pl.
of Trou-de-loup
n.
Alt. of Deva
n.
Dew from the sea; sea dew.
a.
Of or pertaining to dew; resembling dew; dewy.
n.
See Dev.
a.
Of or pertaining to dew; consisting of dew; dewy.
pl.
of Dey
pl.
of Tete-de-pont
v. t.
To wet with dew or as with dew; to bedew; to moisten; as with dew.