Executing System call

Question

String SRCPATH = "/home/mohamed/file1.txt";
String DESPATH = "/home/mohamed/file2.txt";
String command = "tail +10 " + SRCPATH + " > " + DESPATH;
Process p = Runtime.getRumtime ().exec (command);
I tried to execute this program. This is not not getting executed. The command String contains "tail +10 /home/mohamed/file1.txt > /home/mohamed/file2.txt "
If will execute the above string in the command line i am able to get the output.
Please help me out in executing the program.

Answer 1

Characters like >, |, &, etc. are interpreted by the shell, not by the command you're executing. The tail command never sees the >. So if you want to use those shell facilities, execute a shell, and tell it to execute the command. Something like this, though the details may be different on your particular *nix.
rt.exec("/bin/bash -c 'tail a > b'");Although it's probably better to use the exec that takes an array of Strings. Something like this, IIRC.
rt.exec(new String[] {"/bin/bash", "-c", "tail a > b"});