How to execute an external command (run a process) from Kotlin code?

Hello everyone! I just started learning Kotlin and am writing a small console application. I need to execute an external command, for example, run ping or copy a file using cp. In Java, I used Runtime.getRuntime().exec(), but in Kotlin I see there are some built-in functions like ProcessBuilder, but I don't fully understand how to use them. I tried writing this code: ```kotlin fun main() { val command = "ping -c 4 google.com" val process = Runtime.getRuntime().exec(command) val reader = BufferedReader(InputStreamReader(process.inputStream)) var line: String? while (reader.readLine().also { line = it } != null) { println(line) } } ``` But it only outputs the first line and hangs. Am I doing something wrong? Plus I heard that in Kotl