ubuntu-12.04

In a class project my teacher told us to make some code evaluations (C language) and to do so we need to disable the disk caching during the tests. Currently I'm using Ubuntu 12.04, how can I do this? Thanks. You need root access to do this. You can run hdparm -W 0 /dev/sda command to disable write caching, where you have to replace /dev/sda with device for your drive: #include <stdlib.h> ... system("hdparm -W 0 /dev/sda1"); You can also selectively disable write caching to individual partitions like this: hdparm -W 0 /dev/sda1 . To reenable caching again just use the -W 1 argument. man hdparm

I am having a semi-serious problem with OpenSSL 1.0.1 + Ruby 1.9.3 on Ubuntu 12.04. All rubies are installed with rvm require 'uri' require 'net/http' require 'net/https' endpoint = "https://secure.mmoagateway.com/api/transact.php" RUBY_184_POST_HEADERS = { "Content-Type" => "application/x-www-form-urlencoded" } body = "orderid=ae5dd847d9f31209cbffeeea076ed966&orderdescription=Active+Merchant+Remote+Test+Purchase&ccnumber=4111111111111111&ccexp=0913&cvv=123&company=Widgets+Inc&address1=1234+My+Street&address2=Apt+1&city=Ottawa&state=ON&zip=K1C2N6&country=CA&phone=%28555%29555-5555&firstname=

I'm using opencv 2.4.7 on ubuntu 12.04. I'm programming with python and I have a problem when i run this script: import cv2 img = cv2.imread('347620923614738322_233985812.jpg') cv2.namedWindow("window") cv2.imshow("window", img) cv2.waitKey(0) The problem is that the script doesn't stop when I close the image. I searched information about waitKey and I found that using cv2.waitKey(0) is correct. I don't understand, where is the problem? This code works for me from IDLE: # -*- coding: utf-8 -*- # Objectif : découvrir le fonctionnement d'opencv-python # http://opencv-python-tutroals.readthedocs

In intelliJ 12.0 on ubuntu 12.04 with glassfish 3.1.2.2, I'm trying to launch my web application in debug mode but I've got this error message: Error starting domain domain1. The server exited prematurely with exit code 134. Before it died, it produced the following output: FATAL ERROR in native method: JDWP No transports initialized, jvmtiError=AGENT_ERROR_TRANSPORT_INIT(197) ERROR: transport error 202: bind failed: Address already in use ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510) JDWP exit error AGENT_ERROR_TRANSPORT_INIT(197): No transports initialized [../../

Whenever I'm installing a software on my machine it is showing /bin/bash: texi2dvi: command not found My Operating system is Ubuntu 12.04. Do I need install any packages on it.? You need to install texinfo . sudo apt-get install texinfo 来源： https://stackoverflow.com/questions/17652698/texi2dvi-command-not-found