[unscaled]

On most Unix flavors it is not built-in. The only shell I know that has "ls" built-in is BusyBox.

And besides, I said in other places: "ls" has been "deprecated by its maintainer" more times than exa, it's just that somebody has always forked it. GNU "ls" (the one in Linux) is a complete rewrite of the original shell, and it is annoyingly incompatible with the macOS fork of BSD ls.

[retrac]

Worth noting that the Unix shell itself is not a "built-in". The kernel is agnostic about the user interface, which is left entirely to userspace programs to implement. (That was one of Unix's major innovations.)

[pkulak]

/bin/sh is a POSIX requirement though.

[rascul]

sh is, but not the location.

> Applications should note that the standard PATH to the shell cannot be assumed to be either /bin/sh or /usr/bin/sh, and should be determined by interrogation of the PATH returned by getconf PATH, ensuring that the returned pathname is an absolute pathname and not a shell built-in.

https://pubs.opengroup.org/onlinepubs/9699919799/utilities/s...

However, in my experience, I don't recall seeing any POSIX or POSIX like system that didn't have /bin/sh.

[pkulak]

Oh interesting. I assumed that since even Nix has a hard-coded /bin/sh, it must be required. Probably _essentially_ required.

[whimsicalism]

built in to the shell, not the kernel lol

[cb321]

There is also (at least): https://en.wikipedia.org/wiki/Stand-alone_shell