Unable to run program “…” error = 2, no such file or directory (Java)
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Java
I'm trying to create a java program that will set up an SSH connection for me on my MacBook It prompts me for a user name, then an IP address, and then it should be "SSH username @ IP"
Here is my code:
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Scanner;
public class SSH {
public static void main(String[] args) throws Exception {
boolean rep = true;
String username = (null);
String IPAdress = (null);
while (rep) {
Scanner scanner = new Scanner(system.in);
System.out.print("Username: ");
username = scanner.next();
System.out.print("\nIP Adress: ");
IPAdress = scanner.next();
System.out.println("\n\nIs this correct?\nUsername: " + username + "\nIP Adress: " + IPAdress + "\nY/N");
char responce = scanner.next().charAt(0);
if (responce == 'Y' || responce == 'y') {
rep = false;
scanner.close();
} else if (responce == 'N' || responce == 'n') {
} else {
Error displayErrorMessage = new Error();
displayErrorMessage.displayError();
}
}
String SSHStartup = username + "@" + IPAdress;
System.out.println("Running command: ssh " + SSHStartup);
String[] command = { "/bin/bash,-c,ssh " + SSHStartup };
Process p = Runtime.getRuntime().exec(command);
p.waitFor();
BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = "";
StringBuffer output = new StringBuffer();
while ((line = reader.readLine()) != null) {
output.append(line + "\n");
}
}
}
I know, it's messy. Now indent, but not execute the command. It gives me this:
Exception in thread "main" java.io.IOException: Cannot run program "/bin/bash,ssh root@(ip here)": 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:485) at SSH.main(SSH.java:32) 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:248) at java.lang.ProcessImpl.start(ProcessImpl.java:134) at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029) ... 3 more
For the purpose of this article, I have deleted the IP address, but when I compile and run it, I try the actual one, which gives me the same error
help?
Solution
String[] command = { "/bin/bash,ssh " + SSHStartup };
String[] command = { "/bin/bash,ssh " + SSHStartup };
Process p = Runtime.getRuntime().exec(command);
Your command array contains a single value, the string "/ bin / bash, SSH..." Java is trying and cannot execute a file with that name
You may want to construct a command containing the command and its parameters as a string sequence instead of a single string:
String[] command = { "/bin/bash","-c","ssh " + SSHStartup };
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