#!/usr/bin/env npx ts-node // TypeScript code Whether this always works in macOS is unknown. There could be some magic with node installing a shell command shim (thanks to @DaMaxContext for commenting about this). This doesn't work in Linux because Linux distros treat all the characters after env as the command, instead of considering spaces as delimiting separate arguments. Or it doesn't work in Linux if the node command shim isn't present (not confirmed that's how it works, but in any case, in my testing, it doesn't work in Linux Docker containers). This means that npx ts-node will be treated as a single executable name that has a space in it, which obviously won't work, as that's not an executable.

It's essential to note that all the experiments are valid for FreeBSD and I can't guarantee they'll give the same results on other operating systems.

Is there an OS agnostic way of doing this? I like the script command on macOS because you don't have to wrap the command in quotes. The script runs and sends output to the tty which is duplicated in the supplied file, but I can't seem to get the linux version to behave the same way... I'm probably doing something wrong. So what's the equivalent linux script command for this on macOS: script -q -t 0 tmp.out perl -e 'print "Test\n"' Test cat tmp.out Test