Category "linux"

OpenCV output monochrome TIFF group 4 compression

Is there a way to output monochrome TIFF files in OpenCV with group 4 compression? This is the command to do it with imagemagick/graphicsmagick 'gm convert '.$f

Can Valgrind mend memory corruption?

I am testing a C++ program for problems. I am running it under valgrind. I start the program with // valgrind test char * p = (char*)malloc(4);

display all blocked and pending signals at one time

The following program checks if a signal is pending. I use the sigpending function to return blocked (or waiting) signals. The problem is that I don't want this

Docker Openvpn network forward doesn't work

I would like to connect from a php docker, through a OpenVPN docker to a OpenVPN client. Network structure I have added a Docker network (192.168.200.0/24) The

How do I test and / or benchmark traditional Linux Kernel vs Linux Kernel with RT Preempt patch?

I am working on a project to contrast and observe the performance gain with Preempt RT patch for Linux. What kind of C programs should I look to execute on the

Installing RTSP Server Python bindings on Linux

I am trying to install Python bindings of RTSP Server on my Linux camera. I have working Gstreamer, opencv. When I try installing the below, I get the following

Trap and exit big shell script with background processes

I have 2 shell scripts that contain ffmpeg commands (command1.sh and command2.sh). command2.sh has like 500 ffmpeg commands that trigger one after another with

How to run npm start without opening browser for react development on linux

I am learning react and find myself running npm start on the terminal a couple of times but its annoying how it opens a new browser window everytime. I'm tryin

Cannot debug C# tests with visual studio code on linux

I have a c# project which I want to unit test. I'm trying to simply debug a unit test in VSCode running on linux, but I get the following error: Failed to start

Is there a way to log (additional) keystroke information on a Cowrie honeypot?

For a thesis project, I have set up a Cowrie honeypot within an Azure VM running Debian. I am interested in, in addition to the regular logs, extracting specifi

Mysql: can't start mysqld "mysqld.service: control process exited, code=exited status=1"

I have installed a third party framework fate, and mysql has been installed inside this framework, at the following path: /data/projects/fate/common/mysql/mysql

No output in the parent process without fflush(stdout)

I'm trying to understand what is behind this behaviour in my parent process. Basically, I create a child process and connect its stdout to my pipe. The parent p

Use of function kmem_cache_shrink() in slab allocation

While going through the slab allocation mechanism, I came across the following function. int kmem_cache_shrink (struct kmem_cache *) The description of this fu

Libadwaita on windows 10 & 11

I am new to GTK development. I started using GTK4 and it is really grea. As far as I understand libadwaita is used for reflecting dynamic system changes of colo

If I pull every 1 minute with a script on my linux server from Github, will I be banned? [closed]

I have two repos on Gitee and Github, and I want to use my personal server on linux to sync them. What I've done is to pull every 1 minute fro

conditional binary operator expected with Do and ssh connection

This is part of my code that I working to find a word in a remote server connecting via ssh to that server filename=test.repo word=fail exists=$(grep -c $word $

command 'scala' not found after set up by coursier

I use coursier to set up the environment of Scala using command ./cs setup in Ubuntu 20.04 LTS. It was said that all the requirements were installed. However, w

Trying to perform setcap from Qt program

I'm trying to perform setcap from Qt program this way: QProcess process; QString command = "cat"; QStringList args; args << _fileName; process.start(comm

Why function pointer in the structure causes relocation at program load-time

I've the following code that I compile and run on Linux: #include <stdio.h> // can't be static void do_stuff(void) { ;; } typedef void (*func)(void)

get error Cannot find module '/app/app.js' when start NextJs on docker

I have a project on docker developing by nextjs and laravel. The project runs successfully on my laptop but when I try to run this project on another sustem wit