command

问题 I have two scripts; parentScript.sh and childScript.sh . I want to be able to call childScript.sh inside parentScript.sh and return the errors that occur within at any stage. i.e. an error found within childScript.sh looks like: echo "ERROR: Feed file missing for $siteTag" >&2 I know how to return the error out back towards the parent shell. But I have a feeling it is being tampered with, I can no longer printf the result to a nice looking variable. i.e. error+="$( { ./childScript.sh | sed 's

问题 I know I'm probably missing something simple and obvious, but at the moment it eludes me. I'm attempting to use the MVVM pattern. How do you update a reference to a command in a viewmodel that is linked to a child viewmodel? I've got a view (MainView) bound to a viewmodel (MainViewModel). On MainView, I've got an instance of another view (SummaryView) bound to a viewmodel (SummaryViewModel). SummaryViewModel contains a collection of a third viewmodel (SummaryFilterViewModel). On SummaryView,

问题 I want to trigger a shell command in eider exec() or system() from PHP script but it is a task that take a while to complete, is there a way to trigger it and continue running the PHP page load without delay? Edit: I am on CentOS 6, PHP 5.3 回答1: Depends on the OS you are using. For linux: pclose(popen("php somefile.php &","r")); notice the amperstand at the end (very important). For windows: pclose(popen("start php.exe somefile.php","r")); here the start keyword is important. Hope this helps.

问题 I am trying to write a custom management command in django like below- class Command(BaseCommand): def add_arguments(self, parser): parser.add_argument('delay', type=int) def handle(self, *args, **options): delay = options.get('delay', None) print delay Now when I am running python manage.py mycommand 12 it is printing 12 on console. Which is fine. Now if I try to run python manage.py mycommand then I want that, the command prints 21 on console by default. But it is giving me something like

问题 I'm trying to execute a child_process synchronously in node.js (Yes, I know this is bad, I have a good reason) and retrieve any output on stdout, but I can't quite figure out how... I found this SO post: node.js execute system command synchronously that describes how to use a library (node-ffi) to execute the command, and this works great, but the only thing I'm able to get is the process exit code. Any data the command executes is sent directly to stdout -- how do I capture this? > run(

问题 This is Add text to image echo system('convert mug.jpg -font courier -fill green -pointsize 30 -annotate +100+230 \'hi Wlecome yy\' mug123.jpg'); unix command run in php it is working fine when we change the point size hi welcome is over flow the image how can we over come? 回答1: You want a large line of text on top of a small image? I'd expect it to overflow. You could put two lines of text one below the other. However, since you're doing this in PHP, I'd recommend you use an image library

问题 I am trying to do something using system exec in Java Runtime.getRuntime().exec(command); Surprisingly everything that is related with paths, directories and files is not working well I don't get why and just want to know is there any alternatives ? 回答1: The alternative is to use the ProcessBuilder class, which has a somewhat cleaner interface, but your main problem is probably related to how the OS processes command lines, and there isn't much Java can do to help you with that. 回答2: As noted

问题 Here is the command I execute in shell. I want to get the same results in Python. Can I do this using the os module and how? I'm using grep -v here as some file names also have that pattern. Please note that i dont want to invoke this from shell. du -ah 2> >(grep -v "permission denied") |grep [1-9][0-9]G | grep -v [0-9][0-9]K|grep -v [0-9][0-9]M|sort -nr -k 1| head -50 回答1: You can use this python program. It does not spawn any child processes in the shell. #!/usr/bin/env python from __future

问题 i know incr command is atomic in a or more redis server,but other command e.g. set command、Hset command that are still atomic in redis cluster environment 回答1: For those commands supported by cluster mode, they are atomic. However, some commands are limited supported by cluster mode, e.g. commands that take multiple keys. For example, you can run SADD atomically in cluster mode, but you cannot run SUNION , unless all keys are mapped to the same hash slot. Also hash tag can help us map keys to

问题 I have to execute two commands in terminal from my java program. Here is the java code that I am using : import java.io.BufferedReader; import java.io.InputStreamReader; public class Runterminal { public static void main(String[] args) { Process proc; Process procRun; String compileCommand = "aarch64-linux-g++ -std=c++14 hello.cpp"; String runCommand = "aarch64-linux-objdump -d a.out"; try{ proc = Runtime.getRuntime().exec(compileCommand); procRun = Runtime.getRuntime().exec(runCommand); //