I’ve been going through running PHP 5.6 and now looking at 7 running on CentOS 7 (typically 5.4) and I had been installing php56u and now I’ve been seeing php56w and I can’t find anywhere what the difference is. Answer The last letter represents some sort of informal way of designating the o…
Yocto Project usb sensor access
I’ve never worked with the Yocto Project, and barely knows what it is. But I’m investigating the possibility to use a Simatic 2040 as a gateway between an USB hall sensor and industrial PLC network. The sensor that we want to use is this one. It’s designed to use with an Windows desktop PC, …
Is it safe to use all 4 cores of your pc to train a machine learning model
I am training a ml model on my ubuntu 16.04 . I wrote a code that utilizes all 4 cores of my pc. I doubt if this would lead to some sort of crash Using htop command on terminal shows me my 100% usage of all 4 cores along with many information including /usr/lib/xorg/Xorg -core:0 …….. no listen Ans…
How to make the SIGSEGV handler be launched on an alternate stack for stack overflow case only?
My app uses a SIGSEGV (Segmentation Violation) signal handler (registered with sigaction()). When my app accesses a NULL pointer, my SIGSEGV handler gets a control, prints (to the console and log) the stack trace of the offending thread, and invokes the default signal handler which results in the core dump (c…
Segmentation Fault in pthreads, Linux Ubuntu
I’m getting a Segmentation Fault when I run this code. Surprisingly, when I set thread_count to 16 or less, it doesn’t give any error. When I debug the code using gdb, the code gets an error at line local_answer += vec_1[j] * vec_2[j]; in the Calculate() thread function. What is the reason for thi…
docker-compose exec command works into container but not from my host machine
I need to run a command into a chromedriver container passing an ip from a php-fpm container. The php-fpm container hostname is ‘php-fpm’. Both containers are in the same network. So this guys can see each other. If I access the chromedriver container and run this command, it works properly: chrom…
setpgid for Child Zombie Process Gives ESRCH instead of EACCES?
According to the man setpgid(2) page, EACCES An attempt was made to change the process group ID of one of the children of the calling process and the child had already performed an execve(2) (setpgid(), setpgrp()). ESRCH For getpgid(): pid does not match any process. For setpgid(): pid is not the calling proc…
python way to find unique version of software
I’ve multiple components of a software (let’s call it XYZ) installed on my linux (RHEL 6.2) server running python 3.3. I’m trying to covert my install/upgrade script from shell to python. For that I need to fetch the version number, but only once. In my python script I’ve added the bel…
Multiple strings to one string comparison bash
I have a shell script like below. It works based on a condition that if $table contains test then executes small.sh, elde big.sh. Now I want to check if tables contains test , _test_and_results and success in if [[ “$table” =~ “test” ]]. How can I do that I have tried like below But wh…
NASM division using variables instead of actual values
I’m learning some basic arithmetic using NASM on Linux. I need to divide two numbers using variables NUMBER1 and NUMBER2. My code works if I type in actual value instead of variables. For example if I type in ‘6’ instead of NUMBER2 and ‘2’ instead of NUMBER1, the program does div…