On a Linux system, how would I redirect stdout to stderr?
To redirect the stdout to stderr, use your command as follows :- $ command-name 1>&2 where command-name is the command you’re going to feed, 1 represents stdout and 2 represents stderr .
output-redirect
How to execute system commands (linux/bsd) using Java
Your way isn’t far off from what I’d probably do: Runtime r = Runtime.getRuntime(); Process p = r.exec(“uname -a”); p.waitFor(); BufferedReader b = new BufferedReader(new InputStreamReader(p.getInputStream())); String line = “”; while ((line = b.readLine()) != null) { System.out.println(line); } b.close(); Handle whichever exceptions you care to, of course.
How can I redirect all output to /dev/null?
Redirection operators are evaluated left-to-right. You wrongly put 2>&1 first, which points 2 to the same place, as 1 currently is pointed to which is the local terminal screen, because you have not redirected 1 yet. You need to do either of the following: 2>/dev/null 1>/dev/null google-chrome & Or 2>/dev/null 1>&2 google-chrome & The placement … Read more
Difference between $stdout and STDOUT in Ruby
$stdout is a global variable that represents the current standard output. STDOUT is a constant representing standard output and is typically the default value of $stdout. With STDOUT being a constant, you shouldn’t re-define it, however, you can re-define $stdout without errors/warnings (re-defining STDOUT will raise a warning). for example, you can do: $stdout = … Read more