terminal

问题 I am trying to make my module display a printk . I'm new to this so I might have some programming errors. This is my module C file: #include <linux/linkage.h> #include <linux/time.h> #include <linux/module.h> asmlinkage long sys_mycall(int myid, char* firstname) { printk ("Hello, %s! \n sys_mycall called from process %d with ID %d. \n", firstname, current->id, myid); return 0; } static int my_init(void) { return 0; } static int my_exit(void) { printk("Goodbye!"); return 0; } module_init(sys

问题 I got this tidy script from someone: find ../Classes -name \*.cpp -print which simply loops a directory, and prints all files recursively. However, it doesn't follow symlinks. All I can find online is: find ../Classes -name \*.cpp -type l -print But, since the directory is the symlink, not the files, it outputs nothing. How can I solve that? 回答1: Tell find to follow symlinks with -L find -L ../Classes -name \*.cpp -print 来源： https://stackoverflow.com/questions/16693828/bash-read-all-files-in

问题 I found out that I can use SoX's play file.wav stat -freq to generate a table of levels against frequencies for a file. However, it seems to run in real time, i.e. takes as long to complete as the audio does to play. How can I generate the same table of frequencies and levels but in the shortest time possible? 回答1: The output of SoX is rather slow, but this is mainly caused by the displaying. One solution could be to redirect the output of SoX (which is on the standard error (stderr) stream

问题 G'day, I've just posted this question here. Following on from that, is there a means to lock keyboard user input to the terminal, when it's running behind another window? My system requires a user to scan their barcode (barcode scanner acts as a keyboard. ie. outputs a string of letters and presses enter) inside the terminal. However, the system also requires that a log CSV file be displayed on the attached monitor. As such, with the terminal in the background, the cursor automatically

问题 After typing "vi [FILENAME]" in the bash I get the following result: .... \r\"gu1.txt\" 16L, 87C ESC[>cESC[1;1H 111\r\n1112 ..... The first text marked in the this row is the file name following the number of lines and columns of the vi result. The second text includes two escape sequences which I don't understand their meaning : ESC[>c and ESC[1;1H . The last text includes the text shown as a result of the vi, i.e. the content of the file. Can you please explain what is the ANSI escape code

问题 I am trying to view the output of a LaTeX file in Emacs. I am following this guide: http://www.r-bloggers.com/using-doc-view-with-auto-revert-to-view-latex-pdf-output-in-emacs/ I have done everything they said, but when I run C-c C-c and open the pdf in the other Emacs window, I get nonsense. Preferably, I want the pdf to immediately show in the other window when I run C-c C-c --I do a lot of live texing, and I need to periodically view the output. Please note that I am running Emacs from the

问题 When using laravel artisan commands, I don't get the expected color output. If you look at http://laravel.com/docs/4.2/commands , it says "To send output to the console, you may use the info, comment, question and error methods. Each of these methods will use the appropriate ANSI colors for their purpose." But using terminals mintty or cmd, I don't get those colors. For instance, $this->error('Something went wrong!'); should output the text with a red background. What is missing so that I get

问题 I am trying to use junit in the terminal. I have a class Abc.java class Abc{ public int add(int a, int b){ return a+b } } and i have created a class AbcTest.java import org.junit.After; import org.junit.AfterClass; import org.junit.Before; import org.junit.BeforeClass; import org.junit.Test; import static org.junit.Assert.*; class AbcTest { public void testAdd() { System.out.println("add"); int a = 0; int b = 0; Abc instance = new Abc(); int expResult = 0; int result = instance.add(a, b);

问题 I was just curious why on some systems like mine, I have to utilize java -cp . and simply using the java command in the terminal window doesn't work ? 回答1: When you are launching a JVM using the java command, the JVM's classpath is determined as follows: If you use the "-jar" option, then the classpath consists of the JAR file itself, and together with the optional "Classpath" attribute in the JAR file. Otherwise, if you use the "-cp" option, the option's value gives the classpath Otherwise,

问题 I have a directory with a bunch of C files, .c and .h , and another very similar directory of files that a coworker has sent that have very minor differences, due to an update, and I'd like to see what those differences are. I could run a diff on every file manually, but as they're named the same is there anyway I could do it quicker and easily see which files are different and what makes them different? 回答1: diff command is able do it. Just try: diff directory1 directory2 回答2: You may find