linux rc是runcom的縮寫，也是「.cshrc」或「/etc/rc」中出現的rc；rc來自runcom，首次出現於1965年的MIT CTSS系統；在某些場景中，會執行被儲存在檔案中的多個指令commands，我們稱之為runcom，也就是執行指令run commands的簡稱。
#本教學操作環境：linux5.9.8系統、Dell G3電腦。
linux rc是什麼意思?
Linux rc 意義全名
這要從Unix系統的史前時代(1961 -1969)開始講起，一開始由MIT為主力開發過一個兼容分時系統(Compatible Time-Sharing System)，簡稱CTSS。
（這個CTSS他功能雖然比不了後來的Unix系統，但是人家輩分大，年代早。）
CTSS系統中有一個關於命令腳本的特性叫做runcom。
為了致敬這個古版Unix系統－CTSS的runcom特性，在後來的Unix系統中就以rc作為作業系統的啟動檔名。
Tips
程式語言裡的Date是從1970-01-01開始的，
而前面提到的Unix的史前時代(1961-1969 )還在1970年之前。
也可以側邊感受到CTSS這個系統的「輩分」之大。
rc = RunCom
「rc」 是取自「runcom」,來自麻省理工學院在1965 年發展的CTSS系統。相關文獻曾記載這一段話：“具有從檔案中取出一系列命令來執行的功能；這稱為run commands 又稱為“runcom”，而這種檔案又稱為一個runcom ( a runcom)。」
.bashrc bash的運行指令.vimrc vim的運行命令.npmrc npm的運行命令Linux中，檔案名稱以.開頭表示為隱藏檔案。
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
What does rc mean in bashr, zshrc, vimrc etc?
翻譯如下：
對於rc#所代表的意思，你可能會看到以下幾種：
在讀過這份文件之後，我更願意認為rc是runcom的縮寫。
rc = RunCom 就是.cshrc或/etc/rc中出現的那個rcrc來自runcom，首次出現於1965年的MIT CTSS系統。
在某些場景中，(我們)會執行被儲存在檔案中的多個指令commands，我們稱之為runcom即執行指令run commands的簡稱。
另外，這個用來儲存指令的檔案被稱為：a runcom。
Unix檔案命名中的rc就是來自於這樣的老典故。
— Brian Kernighan & Dennis Ritchie, as told to Vicki Brown
Also ESR states that in Run-Control Files:
當然，你也可以在Run-Control文件中找到證據：rc後綴一直往前追溯，會發現其實它在Unix的爺爺老系統——CTSS裡就有了。
而在CTSS這個古的系統中有一個指令腳本的特性叫做：runcom。
於是早期Unix就開始使用rc作為作業系統啟動腳本的檔名，以此來追憶/致敬 CTSS runcom。
所以我認為：rc是runcom的縮寫。
Unix系统的背景
1961-1969：史前时代
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。
Multics(Multiplexed Information and Computing System，多路信息与计算系统)，庞大而负责，不堪重负。
Unics(Uniplexed information and Computing System，单路信息与计算系统)，返璞归真，走上正道。
1969-1971：创世纪
……
1.3) What does {some strange unix command name} stand for?
awk = "Aho Weinberger and Kernighan"
This language was named by its authors, Al Aho, Peter
Weinberger and Brian Kernighan.
grep = "Global Regular Expression Print"
grep comes from the ed command to print all lines matching a
certain pattern
g/re/p
where "re" is a "regular expression".
fgrep = "Fixed GREP".
fgrep searches for fixed strings only. The "f" does not stand
for "fast" - in fact, "fgrep foobar *.c" is usually slower than
"egrep foobar *.c" (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 = "Extended GREP"
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 = "CATenate"
catenate is an obscure word meaning "to connect in a series",
which is what the "cat" command does to one or more files. Not
to be confused with C/A/T, the Computer Aided Typesetter.
gecos = "General Electric Comprehensive Operating Supervisor"
When GE's large systems division was sold to Honeywell,
Honeywell dropped the "E" from "GECOS".
Unix's password file has a "pw_gecos" field. The name is a
real holdover from the early days. Dennis Ritchie has reported:
"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."
nroff = "New ROFF"
troff = "Typesetter new ROFF"
These are descendants of "roff", which was a re-implementation
of the Multics "runoff" program (a program that you'd use to
"run off" a good copy of a document).
tee = T
From plumbing terminology for a T-shaped pipe splitter.
bss = "Block Started by Symbol"
Dennis Ritchie says:
Actually the acronym (in the sense we took it up; it may
have other credible etymologies) is "Block Started by
Symbol." 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,
"Block Ended by Symbol" 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 = "BIFF"
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 ".cshrc" or "/etc/rc") = "RunCom"
"rc" derives from "runcom", 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 "runcom" for "run
commands", and the file began to be called "a runcom."
"rc" in Unix is a fossil from that usage.'
Brian Kernighan & Dennis Ritchie, as told to Vicki Brown
"rc" is also the name of the shell from the new Plan 9
operating system.
Perl = "Practical Extraction and Report Language"
Perl = "Pathologically Eclectic Rubbish Lister"
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 "Life with Unix" contains lots more of these
tidbits.相关推荐：《Linux视频教程》
以上是linux rc是什麼意思的詳細內容。更多資訊請關注PHP中文網其他相關文章！
