BufferedReader in = new BufferedReader(new InputStreamReader(Runtime.getRuntime().exec("ping 192.168.0.1 -c 1 -w 1").getInputStream()));

BufferedReader in = new BufferedReader(new InputStreamReader(Runtime.getRuntime().exec("for i in {0..255}; do ping 192.168.0.$i -c 1 -w 1; done").getInputStream()));

java.io.IOException: Cannot run program "for": error=2, No such file or directory
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
    at java.lang.Runtime.exec(Runtime.java:620)
    at java.lang.Runtime.exec(Runtime.java:450)
    at java.lang.Runtime.exec(Runtime.java:347)
    at network.main(network.java:14)
Caused by: java.io.IOException: error=2, No such file or directory
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
    at java.lang.ProcessImpl.start(ProcessImpl.java:134)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)