Polyadic os

Executes same shell command.

Use os[] to see list of available command.

Syntax: os[]; os <x>; os[<x>]

o)os[]
"pwd"
"exe"
"cd"
"name"
"home"
"tmp"
"pid"
"dir"
o)os "name"
"linux"
o)
o)os["dir";"std"]
(2023.07.21D13:40:09.791455513;`file;12450;"std/core.o")
(2023.04.11D10:00:41.644733021;`file;5499;"std/http.o")
(2023.07.21D13:40:09.791913985;`file;9396;"std/core_test.o")
(2023.09.07D08:26:42.919121500;`file;16874;"std/sql.o")
(2021.10.11D14:10:41.730449203;`file;1017;"std/xml.o")
(2020.03.12D15:24:15.150369550;`file;506;"std/json.o")
(2021.10.11D14:10:41.728006589;`file;3673;"std/lit.o")
(2023.07.21D13:40:09.792253959;`file;10610;"std/repl.o")
(2023.07.21D13:40:09.793254928;`file;7544;"std/urllib.o")
(2023.04.11D10:00:41.645062312;`file;2491;"std/markdown.o")
(2023.04.11D10:00:41.644044351;`file;699;"std/htreq.o")
(2020.03.12D15:24:15.150907150;`file;4851;"std/prolog.o")
o)