:sig
String shell_exec(String cmd)

:params
cmd : string that contains the shell command line to be executed
return value : output of the command execution

:desc
Executes a Linux shell command and returns the generated output

:see
>sys

:related
**PHP:** `shell_exec()`, `exec()`, or `proc_open()`
**JavaScript / Node.js:** Node `child_process.exec()` or `spawn()`