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| | Unix time - Wikipedia, the free encyclopedia |
 | | The earliest versions of Unix time had a 32-bit integer incrementing at a rate of 60 Hz, which was the rate of the system clock on the hardware of the early Unix systems. | | | The Unix epoch is the time 00:00:00 UTC on January 1, 1970. | | | As a result, Unix times such as 915 148 799.50, apparently in the second preceding a leap second, are de facto ambiguous, as are (both de facto and de jure) times such as 915 148 800.50. |
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http://en.wikipedia.org/wiki/Unix_time
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| | The Creation of the UNIX Operating System: An Overview of the UNIX* Operating System |
| | A major contribution of the UNIX system was its portability, permitting it to move from one brand of computer to another with a minimum of code changes. | | | Although UNIX was developed by programmers for programmers, it provides an environment so powerful and flexible that it is found in businesses, sciences, academia, and industry. | | | UNIX e-mail at first permitted users on the same computer to communicate with each other via their terminals. |
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http://www.bell-labs.com/history/unix/tutorial.html
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| | 6.11 time -- Time access and conversions |
| | The precision, and in fact the very definition of the meaning of ``processor time'', depends on that of the C function of the same name, but in any case, this is the function to use for benchmarking Python or timing algorithms. | | | The cut-off point in the future is determined by the C library; for Unix, it is typically in 2038. | | | On many Unix systems (including *BSD, Linux, Solaris, and Darwin), it is more convenient to use the system's zoneinfo (tzfile(5)) database to specify the timezone rules. |
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http://www.python.org/doc/current/lib/module-time.html
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| | BSTJ version of C.ACM Unix paper |
| | Unix is a general-purpose, multi-user, interactive operating system for the larger Digital Equipment Corporation PDP-11 and the Interdata 8/32 computers. | | | The PDP-11/70 on which the Research Unix system is installed is a 16-bit word (8-bit byte) computer with 768K bytes of core memory; the system kernel occupies 90K bytes about equally divided between code and data tables. | | | Perhaps the most important achievement of Unix is to demonstrate that a powerful operating system for interactive use need not be expensive either in equipment or in human effort: it can run on hardware costing as little as $40,000, and less than two man-years were spent on the main system software. |
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http://cm.bell-labs.com/cm/cs/who/dmr/cacm.html
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| | Wikinfo UNIX |
| | The University of California, Berkeley was notable for making UNIX the center of its Computer Science OS research and porting it to all of their mini-computers including the VAX, the successor to the DEC PDP-11. | | | Once Berkeley Unix became sufficiently mature it was packaged as the Berkeley Software Distribution (BSD), close to the same time Bell Labs began packaging AT&T's UNIX system as System III (three), the precursor to System V (five). | | | Several UNIX system vendors agreed on the modern ELF format as standard for binary and object code files. |
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http://www.wikinfo.org/wiki.php?title=Unix
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| | Origins and History of Unix, 1969-1995 |
| | Unix was born in 1969 out of the mind of a computer scientist at Bell Laboratories, Ken Thompson. | | | Unix was very close to being the first system under which a programmer could sit down directly at a machine and compose programs on the fly, exploring possibilities and testing while composing. | | | The first Unix of which it can be said that essentially all of it would be recognizable to a modern Unix programmer was the Version 7 release in 1979. |
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http://www.catb.org/~esr/writings/taoup/html/ch02s01.html
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| | Unix Standards |
| | The problem for the new-school Unixes, therefore, was not API compatibility at the source-code level. | | | The Unix standards that evolved after 1985 were quite successful at this — so much so that they serve as valuable documentation of the API of modern Unix implementations. | | | The original motivation for the development of Unix standards was the split between the ATandT and Berkeley lines of development that we examined in Chapter 2. |
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http://www.faqs.org/docs/artu/ch17s02.html
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| | [No title] |
| | Once the Unix kernel was coded in C, it would become possible to implement Unix on different computers without having to rewrite the majority of the code. | | | The contributions to the evolution of Unix by researchers at Bell Labs and then by those at the University of California at Berkeley, and other users and programmers around the world who continued the development of Unix, are an important achievement in the development of the process of software creation. | | | Contributing to the value of Unix during its early development, was the fact that the source code was open and available. |
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http://www.columbia.edu/~rh120/ch001j.c11
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| | Learning Unix |
| | Add to this the fact the Unix is sort of an underprivileged operating system. | | | Unix has acquired quite a reputation for consuming novice users (and occasional system administrators) whole with its hostile behavior and obscure command syntax. | | | It's a good introduction to the way Unix and the X Window system work as well as how to use them. |
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http://www.uwsg.indiana.edu/usail/firsttime/argh.html
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| | Time out of XML-X |
| | NOTE that Unix time is only capable of representing dates between Unix epoch, 01 January 1970 and when it runs out of 31 bits and goes negative, 19 January 2038. | | | Oh, as a detail, anything that doesn't fit in Unix time would be illegal, until Unix converts to 64bit time (sometime in the next decade, they've got until 2038). | | | Unix solved the time problem back in 1970. |
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http://xml-x.org/time.html
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| | A Brief History of Unix |
| | UNIX is nearly the unanimous choice of operating system for computer companies started since 1985. | | | In UNIX because the C language was written to be used to implement an operating system rather than a traditional "input-processing-output" application, use of these sophisticated features is quite easily done from the C language without writing any assembly language. | | | As UNIX was ported onto more and more different types of computer hardware the UNIX networking allowed many different types of systems to share and mutually use data. |
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http://vertigo.hsrl.rutgers.edu/ug/unix_history.html
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| | UNIX on the Chem Cluster - Part II |
| | As discussed previously, UNIX is a multiuser operating system, which means users must share the computing power in order to get things done. | | | When you attempt to run a program on a UNIX machine -- whether it be a text editor, a web browser, or a computational package like Gaussian -- many things take place. | | | It is entirely possible for you to have processes running even when you are not logged in to a UNIX computer. |
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http://www.udel.edu/chem/computing/unix2.html
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| | Unix Part 1: Overview 1 |
| | At the time UNIX was introduced, some of these features set the UNIX operating system apart from other systems available at that time. | | | Each computer has a maximum amount of memory (RAM) that is installed in the computer. | | | When the UNIX system starts up, it also starts a system process (getty) which monitors the state of each terminal input line. |
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http://goforit.unk.edu/unix/part1_1.htm
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| | Apple - Mac OS X - UNIX |
| | UNIX users will feel at home in Darwin, the robust BSD environment that underlies Mac OS X. That environment is accessible at any time from the Terminal application. | | | Beneath the surface of Mac OS X lies an industrial-strength UNIX foundation hard at work to ensure that your computing experience remains free of system crashes and compromised performance. | | | Mac OS X provides a robust set of optimized libraries, making it easy to port your existing UNIX code. |
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http://www.apple.com/macosx/features/unix
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| | Unix - Frequently Asked Questions (1/7) [Frequent posting] |
| | Many people use egrep all the time, since it has some more sophisticated internal algorithms than grep or fgrep, and is usually the fastest of the three programs. | | | These numbers refer to the section of the "Unix manual" where the appropriate documentation can be found. | | | With the variety of Unix systems in the world, it's hard to guarantee that these answers will work everywhere. |
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http://www.faqs.org/faqs/unix-faq/faq/part1
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| | MacDevCenter.com -- Why Unix Matters to Mac OS X |
| | Throughout Unix's history it was difficult to get software vendors to write affordable and timely Unix versions of their software. | | | As a long time Mac power user (but not a hacker), Unix makes Mac relevant in a way it hasn't been since the Mac 128. | | | The result was that Unix commercial software was too expensive and too late. |
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http://www.macdevcenter.com/pub/a/mac/2002/10/03/keynotes.html
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| | cpu time - UNIX Socket FAQ |
| | I am translating that you're saying the process time (at the app level - putime) and the process time (at the system level - pstime) are both very low but the system time in general is spiking up... | | | if you are using a hardware accelerator, you may see the process system time and user time flip (depending on how the hardware accel drivers are integrated into the system)... | | | UNIX Socket FAQ > UNIX Platforms > Processes |
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http://www.developerweb.net/forum/showthread.php?t=3097
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| | The Maruti Project |
| | The proof-of-concept version of this design was implemented to run on top of the Unix operating system and supported hard and non-real-time applications running in a distributed, heterogeneous environment. | | | In this environment the same code which runs in the other two environments can execute while access to all Unix debugging tools is available. | | | The major challenge in building operating systems for mission-critical computing is the integration of multiple requirements. |
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http://www.cs.umd.edu/projects/maruti
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| | Early Unix history and evolution |
| | However, Unix was born in 1969 not 1974, and the account of its development makes a little-known and perhaps instructive story. | | | Pipes appeared in Unix in 1972, well after the PDP-11 version of the system was in operation, at the suggestion (or perhaps insistence) of M. McIlroy, a long-time advocate of the non-hierarchical control flow that characterizes coroutines. | | | Today, the only important Unix program still written in assembler is the assembler itself; virtually all the utility programs are in C, and so are most of the applications programs, although there are sites with many in Fortran, Pascal, and Algol 68 as well. |
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http://cm.bell-labs.com/cm/cs/who/dmr/hist.html
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| | Unix Time Stamp . com |
| | Therefore, the unix time stamp is merely the number of seconds between a particular date and the Unix Epoch. | | | But by then we'll all be using 64-bit processors in our computers solving this potential date of death for millions of applications. | | | Download the Unix Time Stamp.com Calculator Source Code (906 bytes) |
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http://www.unixtimestamp.com
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| | Real-Time Operating Systems |
| | Real time OS based on Unix for 68000 based systems. | | | A distributed, Real-time OS based on a network of M68000s with a UNIX host. | | | Because effective real-time support dominates the design of such systems, most OSs with real-time capabilities are listed here even if they could logically be placed in other categories as well. |
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http://www.csee.wvu.edu/~jdm/classes/cs258/OScat/rtime.html
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| | CCP4 Program Suite: unix.m4/vms.for/w32mvs.f |
| | UNIX uses fortran system call Ltime and gmtime which dissect a UNIX time into month, day, etc., either for the local time zone or as GMT. | | | Actually for UNIX and MVS it ignores STATUS and always uses the *last* error that occurred. | | | Using f77: works on VMS Fortran V7 but not earlier versions works on Digital UNIX V4.0F. |
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http://www.ccp4.ac.uk/dist/html/unix.html
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| | The Creation of the UNIX Operating System: For more information |
| | On using UNIX, there are many books available at book stores and libraries, such as: | | | The Creation of the UNIX Operating System: For more information | | | On the history of UNIX in general, see: |
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http://www.bell-labs.com/history/unix/moreinfo.html
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| | Domain Time II: UNIX and Linux Clients |
| | Since Domain Time is a critical system service, the evaluation version does not time out or stop operating after the evaluation period has expired. | | | This is the honor system; please honor it. | | | Domain Time II Client daemon for Solaris 7/8 (Intel) |
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http://www.greyware.com/software/domaintime/instructions/client/nix.asp
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| | Unix Date Time Stamp to Local Time?? - PowerBASIC Forums |
| | Both Unix and Windows time/date values are based on counting up from a starting point. | | | Subtracted 18000 from the unix date value which is equivalent to | | | 'The unix date is the number of seconds since Jan 1, 1970 |
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http://www.powerbasic.com/support/forums/Forum4/HTML/002597.html
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| | [No title] |
| | UNIX time counts the number of seconds since an ``epoch.'' This is very convenient for programs that work with time intervals: the difference between two UNIX time values is a real-time difference measured in seconds, within the accuracy of the local clock. | | | Arthur David Olson's popular time library uses an epoch of 1970-01-01 00:00:10 TAI. | | | Unfortunately, xntpd, a program that synchronizes clocks using the Network Time Protocol, pandered to those broken localtime() libraries, at the expense of reliability. |
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http://cr.yp.to/proto/utctai.html
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| | Time (Unix) - Wikipedia, the free encyclopedia |
| | is a command in the Unix operating systems. | | | The output format varies between different versions of the command, and some give additional statistics, as in this example: | | | If you are looking for Unix's means of representing points in time, see Unix time. |
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http://en.wikipedia.org/wiki/Time_(Unix)
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| | UGU: Unix Guru Universe - UGU Unix Flavors |
| | UniSoft - One of the first widely-used commercial UNIX ports. | | | Digital Unix (OSF1)(TRU64) - Digital Equiptment Corp. (DEC) | | | This Page is part of the UNIX System Administration WebRing |
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http://www.ugu.com/sui/ugu/show?ugu.flavors
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| | Open Directory - Computers: Software: Operating Systems: Realtime: Unix |
| | USIX - Provides source and binary compatibility with SVR4/386, with: guaranteed response time to interrupts in real-time uses, multiprocessor kernel architecture, better resource utilization, more robust file system, able to dynamically extend kernel with no re-linking. | | | Open Directory - Computers: Software: Operating Systems: Realtime: Unix |
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http://dmoz.org/Computers/Software/Operating_Systems/Realtime/Unix
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| | PHP: time - Manual |
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Returns the current time measured in the number of seconds since the Unix Epoch (January 1 1970 00:00:00 GMT). | | | heres another way to convert a mysql timestamp to a unix timestamp without using the function UNIX_TIMESTAMP in mysql: | | | Be careful about using the database clock (say UNIX_TIMESTAMP() in MySQL) and the time() function if you're writing an application that may have the database be on a different machine than the web server. |
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http://us3.php.net/time
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| | SecuriTeam™ - UNIX Securelevels Time Modification Flaw |
| | The problem has been fixed in all affected versions of NetBSD. | | | Security News - Security Reviews - Exploits - Tools - UNIX Focus - Windows Focus | | | By setting the system time to the end of unixtime, it is possible to reset the system time to the lowest possible integer of unixtime. |
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http://www.securiteam.com/unixfocus/5LP0E0AHFW.html
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| | The UNIX Forums - time zones |
| | The UNIX Forums > Network Computing Topics > UNIX for Dummies Questions and Answers | | | The program I am adding code to runs every hour and I put some code in it to create a file with a date stamp on the end of it. | | | Hi all, this is my first post so I hope someone can help me. I am currently putting code into a script that is run through the cron on a unix box where the date/time is set to EDT or Eastern Daylight Time but I am in Central Standard time. |
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http://www.unix.com/showthread.php?t=2709
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| | Is there a good part time Unix Course in London? - LinuxQuestions.org |
| | Sponsored Links: Cheap web hosting - Web hosting - Computer Help | | | Is there a good part time Unix Course in London? | | | Is there a good part time Unix Course (Uni/College) in (western) London? |
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http://www.linuxquestions.org/questions/showthread.php?p=1754801#post1754801
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| | CPSC689/CPSC463 -- Measuring Execution Time on UNIX |
| | We can measure the execution time of a program, or a part of it, such as, a function, by collecting the system time immediately before and after the portion of code under examination. | | | On UNIX there are several methods to measure elapsed time. | | | Measuring Execution Time in POSIX Compliant Programs and UNIX |
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http://courses.cs.tamu.edu/cpsc612/miket/notes/clock.html
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| | Unix for the first time! |
| | This collection of Unix pages was graciously suplied by Mr. | | | Liam Madden who first wrote them as an online course for students who "realise their employability would be enhanced by gaining practical skills". |
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http://snap.nlc.dcccd.edu/learn/madden
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| | Converting UNIX Dates (Decimal and Hexadecimal) |
| | Here's some Javascript forms to convert UNIX Dates (both decimal and hexadecimal) to "human" time (both local time and UTC/GMT). | | | These forms require a JavaScript to be enabled in your web browser to work. | | | UNIX dates are measured in seconds since midnight 1/1/1970 UTC (GMT). |
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http://dan.drydog.com/unixdatetime.html
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