Eevee's heteroglot entry for COBOL is interesting, coming from … practically anything else.
There's also someone doing AOC in ABAP (basically SAP COBOL) who posts over in the AOC subreddit. I've looked at them and ... mhm, I know some of these words!
In addition to the other comment about the exit code, you might be interested in the exitcode crate, which offers up a BSD convention for those exit codes.
They are, essentially, just numbers on unixes and don't really have as much standardization as e.g. HTTP codes afaik. Various programs may have their own local conventions as to what an exit code means.
The name is constructed from two parts:
ls: listusb: usbIt lists usb devices that your machine (/kernel) knows has been connected; they may not necessarily be usable.
E.g. I have some sound output device connected via USB to one machine. On most of my machines I've switched from pulseaudio to pipewire¹, and I figured I'd bring that machine closer to the others so there's less variance. Unfortunately the sound output device didn't want to work with pipewire. The problem manifested as no sound and pipewire not listing the device.
lsusbhelped me know that the machine at the very least recognized the device, but wasn't currently able to use it. (It did actually also show up as an error indmesg -H, but reinstating pulseaudio let the device work again as normally. So now I just have to live with a situation where some machines use pipewire because ~bluetooth~ and others use pulseaudio because … usb?¹)¹ There's a memory of ALSA vs OSS I didn't want to be reminded of