command

问题 I have an app that has to mount a disk on a server. The disk and the server all connected, it just has to use the linux 'mount' command. I wrote a php that is simply: <? exec("/var/www/MountTheDisk.sh"); ?> And I added bash script: MountTheDisk.sh #!/bin/bash diskutil mount /dev/xvdb1 /mnt/theDisk/ echo trying to mount Now, if I run that php, I get no result. Nothing is echo'd and no disk is mounted. How can I run this command remotely? Maybe php is not the best method? 回答1: This solution

问题 I would like to use the return of the command 'gpio input' in an if statement in U-Boot but it doesn't seem to work. So I've tried something like : if test {gpio status 50} -eq 1; then echo 1; else echo 0; fi; But it always return 1 whether the GPIO is high or low. I also tried to store the result of the gpio status command into a variable by using the setenv command but it doesn't work either. PS: I've modified the gpio.c file in the U-boot source code so the command returns just '0' or '1'

问题 I created a command with Artisan $ php artisan command:make NeighborhoodCommand This created the file app/commands/NeighborhoodCommand.php Snippet of the code. I modified the name value and filled in the fire() function <?php use Illuminate\Console\Command; use Symfony\Component\Console\Input\InputOption; use Symfony\Component\Console\Input\InputArgument; class NeighborhoodCommand extends Command { protected $name = 'neighborhood'; public function fire() { // my code } } But then when I try

问题 I am looking into how to write a paint program that supports undo and seeing that, most likely, a command pattern is what I want. Something still escapes me, though, and I'm hoping someone can provide a simple answer or confirmation. Basically, if I am to embody the ability to undo a command, for instance stamping a solid circle on the screen, does this mean I need to essentially copy the frame buffer that the circle covers into memory, into this command object? I don't see any other way of

问题 I am looking into how to write a paint program that supports undo and seeing that, most likely, a command pattern is what I want. Something still escapes me, though, and I'm hoping someone can provide a simple answer or confirmation. Basically, if I am to embody the ability to undo a command, for instance stamping a solid circle on the screen, does this mean I need to essentially copy the frame buffer that the circle covers into memory, into this command object? I don't see any other way of

问题 Is there any command in batch to search and replace a string in environment variable PATH ? For example the contents of environment variable PATH is: C:\windows\system32;C:\windows;C:\windows\System32\Wbem;C:\windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\AccuRev\bin;C:\Python24 I have to search for C:\Python24 in this variable and need to replace it by C:\Python27 . 回答1: Local PATH replacement The solution provided by wmz is perfect: set "PATH=%PATH:Python24=Python27%" For details

问题 I'm trying to display a decision tree in Jupyter Notebook and I keep receiving the message: CalledProcessError: Command '['dot.bat', '-Tsvg']' returned non-zero exit status 1 I'm using the following code: from sklearn.datasets import load_iris from sklearn import tree import graphviz from IPython.display import SVG iris = load_iris() clf = tree.DecisionTreeClassifier() fitted_clf = clf.fit(iris.data, iris.target) graph = graphviz.Source(tree.export_graphviz(fitted_clf, feature_names = iris

问题 I found most of the programmers suggest use list of strings to represent the command in popen. However, in my own project, I found a whole string works in more cases. For example, the following works subprocess.Popen('pgrep -f "\./run"', stdout=subprocess.PIPE, shell=True).wait() while subprocess.Popen(['pgrep', '-f', '"\./run"'], stdout=subprocess.PIPE, shell=True).wait() does not. May I know what's the difference between these two ways of implementation and why the second one does not work

问题 I am trying to create a png file with a transparent background, in which I put images next to each other. My command so far is this: convert --% -bordercolor none -background none -gravity center logo.png -border 5x5 ( img1.jpg img2.jpg img3.jpg -border 5x5 +append ) ( img4.jpg img5.jpg img6.jpg -border 5x5 +append ) -append -border 5x5 -resize 720x480 output.png it creates me this image how do I have to change my command to make the image appear as following? (I made the background grey so

问题 This question already has answers here : How to add to the PYTHONPATH in Windows, so it finds my modules/packages? (22 answers) Closed 2 years ago . I recently installed Python 3.6 for my Windows 10 (64bit) and I want to use pip, but before to install that, I need to execute the following command using the downloaded get-pip.py program: python get-pip.py Somehow this doesn't work and I get the following message from Command Line: 'python' is not recognized as an internal or external command,