What does etc stand for

Aug 11, 2022 at 13:06:53

/bin for programs (essentially, executable binaries)
/dev for device files
/lib for extra executable code loaded by programs (libraries)
/usr first for user data, then as an extra OS area with its own bin and lib and then man containing the manual in electronic form. The source code was also often provided somewhere under /usr .
And there were a few files in the operating system that didn't fit in any of the existing categories. This included a passwd file containing users' passwords, and an mtab file written by mount , and the init and later rc programs executed at boot time, and over time more and more programs that were intended to be executed only for administration purpose and not as part of normal usage.