Script languages like Perl and Tcl can be embedded in shell scripts. On WinNT series I have used JScript (WHS) for years.
Do you use JavaScript as your Unix shell scripting language? Can you recommend it? Or do you prefer the sh/bash syntax for glue scripts?
On MDN (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Shells) I found e.g. ShellJS (https://github.com/arturadib/shelljs).