What does linux rc mean?

linux rc is the abbreviation of runcom, and is also the rc that appears in ".cshrc" or "/etc/rc"; rc comes from runcom, which first appeared in the MIT CTSS system in 1965; in some scenarios , will execute multiple commands stored in the file, which we call runcom, which is the abbreviation of run commands.

## The operating environment of this tutorial: linux5.9.8 system, Dell G3 computer.

What does linux rc mean?

The full meaning of Linux rc

This comes from the prehistoric era of the Unix system (1961 -1969), at the beginning, MIT developed a Compatible Time-Sharing System (CTSS).

(Although the functions of this CTSS are not as good as those of later Unix systems, they are older and older.)
There is a feature about command scripts in the CTSS system called
runcom. In order to pay tribute to the runcom feature of CTSS, an early version of Unix system,
rc was used as the startup file name of the operating system in later Unix systems.

Tips

Date in programming language starts from 1970-01-01,

and the prehistoric era of Unix mentioned earlier (1961-1969 ) before 1970.

You can also feel the "seniority" of the CTSS system from the side.

Meaning

rc = RunCom

"rc" is taken from "runcom", From the CTSS system developed by MIT in 1965. Relevant literature once recorded this paragraph: "It has the function of taking out a series of commands from the file to execute; this is called

run commands, also called "runcom", and this kind of file is also called a runcom ( a runcom)."

Example

• .bashrc bash running command
• .vimrc Vim’s running command
• .npmrc npm’s running command

In Linux, the file name starting with

. is expressed as Hidden files.

leung@wuyujin ~ % ls -al | grep rc$
-rw-------   1 leung  staff      33  5 13 20:34 .npmrc
-rw-r--r--   1 leung  staff     116  5 13 21:20 .yarnrc
-rw-r--r--   1 leung  staff      55  6  2 20:00 .zshrc

ReferenceWhat does rc mean in bashr, zshrc, vimrc etc?

What does rc mean in bashr, zshrc, vimrc etc?

is translated as follows:

For the meaning of
rc, you may see the following:

run commands
• resource control
• run control
• runtime configuration

After reading this document, I prefer to think that

rc is the abbreviation of runcom.

rc = RunCom is the rc# that appears in .cshrc or /etc/rc ##rc
comes from runcom, which first appeared in the MIT CTSS system in 1965. In some scenarios, (we) will execute multiple commands

commands

stored in the file, which we call runcomthat is, running commands## Abbreviation for #run commands. In addition, the file used to store commands is called: a runcom.
The rc in Unix file naming comes from this old allusion.
— Brian Kernighan & Dennis Ritchie, as told to Vicki BrownAlso ESR states that in Run-Control Files:
Evidence is found in:

rc
The suffix is ​​traced back all the way, and you will find that it actually exists in CTSS, the granddaddy of Unix systems. In the ancient system of CTSS, there is a command script feature called: runcom
. So in the early days of Unix, rc
was used as the file name of the operating system startup script to recall/pay tribute to CTSS runcom. So I think:
rc is the abbreviation of runcom

.

<h2> <a id="CTSSCompatible_TimeSharing_System_70"></a>CTSS(Compatible Time-Sharing System)兼容分时系统</h2> <p>Unix系统的背景<br> 1961-1969：史前时代<br> CTSS(Compatible Time-Sharing System，兼容分时系统)，以MIT为首的开发小组，小而简单的实验室原型。<br> Multics(Multiplexed Information and Computing System，多路信息与计算系统)，庞大而负责，不堪重负。<br> Unics(Uniplexed information and Computing System，单路信息与计算系统)，返璞归真，走上正道。<br> 1969-1971：创世纪<br> ……</p> <h2> <a id="_Unix__Frequently_Asked_Questions_17_Frequent_postingSection__What_does_some_strange_unix_command_name_stand_for_82"></a>参考 Unix - Frequently Asked Questions (1/7) [Frequent posting]Section - What does {some strange unix command name} stand for</h2> <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">1.3)  What does {some strange unix command name} stand for?       awk = &quot;Aho Weinberger and Kernighan&quot;         This language was named by its authors, Al Aho, Peter         Weinberger and Brian Kernighan.       grep = &quot;Global Regular Expression Print&quot;         grep comes from the ed command to print all lines matching a         certain pattern                     g/re/p         where &quot;re&quot; is a &quot;regular expression&quot;.       fgrep = &quot;Fixed GREP&quot;.         fgrep searches for fixed strings only.  The &quot;f&quot; does not stand         for &quot;fast&quot; - in fact, &quot;fgrep foobar *.c&quot; is usually slower than         &quot;egrep foobar *.c&quot;  (Yes, this is kind of surprising. Try it.)         Fgrep still has its uses though, and may be useful when searching         a file for a larger number of strings than egrep can handle.       egrep = &quot;Extended GREP&quot;         egrep uses fancier regular expressions than grep.  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.       cat = &quot;CATenate&quot;         catenate is an obscure word meaning &quot;to connect in a series&quot;,         which is what the &quot;cat&quot; command does to one or more files.  Not         to be confused with C/A/T, the Computer Aided Typesetter.       gecos = &quot;General Electric Comprehensive Operating Supervisor&quot;                  When GE's large systems division was sold to Honeywell,         Honeywell dropped the &quot;E&quot; from &quot;GECOS&quot;.         Unix's password file has a &quot;pw_gecos&quot; field.  The name is a         real holdover from the early days.  Dennis Ritchie has reported:             &quot;Sometimes we sent printer output or batch jobs              to the GCOS machine.  The gcos field in the password file              was a place to stash the information for the $IDENT card.              Not elegant.&quot;       nroff = &quot;New ROFF&quot;       troff = &quot;Typesetter new ROFF&quot;                  These are descendants of &quot;roff&quot;, which was a re-implementation         of the Multics &quot;runoff&quot; program (a program that you'd use to         &quot;run off&quot; a good copy of a document).       tee       = T         From plumbing terminology for a T-shaped pipe splitter.       bss = &quot;Block Started by Symbol&quot;                  Dennis Ritchie says:             Actually the acronym (in the sense we took it up; it may             have other credible etymologies) is &quot;Block Started by             Symbol.&quot; It was a pseudo-op in FAP (Fortran Assembly [-er?]             Program), an assembler for the IBM 704-709-7090-7094             machines.  It defined its label and set aside space for a             given number of words.  There was another pseudo-op, BES,             &quot;Block Ended by Symbol&quot; that did the same except that the             label was defined by the last assigned word + 1.  (On these             machines Fortran arrays were stored backwards in storage             and were 1-origin.)             The usage is reasonably appropriate, because just as with             standard Unix loaders, the space assigned didn't have to be             punched literally into the object deck but was represented             by a count somewhere.       biff = &quot;BIFF&quot;         This command, which turns on asynchronous mail notification,         was actually named after a dog at Berkeley.             I can confirm the origin of biff, if you're interested.             Biff was Heidi Stettner's dog, back when Heidi (and I, and             Bill Joy) were all grad students at U.C. Berkeley and the             early versions of BSD were being developed.   Biff was             popular among the residents of Evans Hall, and was known             for barking at the mailman, hence the name of the command.         Confirmation courtesy of Eric Cooper, Carnegie Mellon University       rc (as in &quot;.cshrc&quot; or &quot;/etc/rc&quot;) = &quot;RunCom&quot;         &quot;rc&quot; derives from &quot;runcom&quot;, from the MIT CTSS system, ca. 1965.             'There was a facility that would execute a bunch of             commands stored in a file; it was called &quot;runcom&quot; for &quot;run             commands&quot;, and the file began to be called &quot;a runcom.&quot;             &quot;rc&quot; in Unix is a fossil from that usage.'                  Brian Kernighan &amp; Dennis Ritchie, as told to Vicki Brown         &quot;rc&quot; is also the name of the shell from the new Plan 9         operating system.       Perl = &quot;Practical Extraction and Report Language&quot;       Perl = &quot;Pathologically Eclectic Rubbish Lister&quot;         The Perl language is Larry Wall's highly popular         freely-available completely portable text, process, and file         manipulation tool that bridges the gap between shell and C         programming (or between doing it on the command line and         pulling your hair out).  For further information, see the         Usenet newsgroup comp.lang.perl.misc.       Don Libes' book &quot;Life with Unix&quot; contains lots more of these       tidbits.</pre><div class="contentsignin">Copy after login</div></div>

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