Many tools in the modern JavaScript ecosystem name their configuration files ending in the letters rc. For e.g.
ES Lint -> .eslintrc.json
npm -> .npmrc.json
yarn -> .yarnrc
I know that these are configuration files as I am familiar with these technologies.
C most likely stands for configuration. What is the r in the rc?
The rc at the end of a file is related to the phrase "run commands"; its use derives from the /etc/rc. * files used to start most Unix systems. The rc suffix is commonly used for any file that contains startup information for a program. Common rc files include .
From Wikipedia: The term rc stands for the phrase "run commands". It is used for any file that contains startup information for a command. It is believed to have originated somewhere in 1965 from a runcom facility from the MIT Compatible Time-Sharing System (CTSS).
Within computing database management systems, the RCFile (Record Columnar File) is a data placement structure that determines how to store relational tables on computer clusters. It is designed for systems using the MapReduce framework.
It's either short for "runcom", which is an abbreviation for "run commands"; or it's "run control". Other uses for the abbreviation are: runtime configuration.
rc stands for run commands. More here
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