I’m doing this challenge thing and this is one of the levels: An agent on Level 05 has told us about another big hack he’s working on. Apparently someone broke into a popular shopping site, stole all the usernames and passwords and was going to post them online. Luckily, we got to them first and r…
Delete certain columns and add horizontally in AW. So many columns that I cannot type each one
I have been struggling more than a day and I cannot make my script work. Please help. My txt file extends to 500 columns. I need to delete columns 5,9,13,21,…, always delete n=4 column. Then, after removing the columns I mentioned above, I need to add all the columns remaining, BUT NOT taking into accou…
How to use an API in c using linux distro: ubuntu 16.04 [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago. Improve this question I am beginner in linux and I want to use an API in C language from a certa…
Use bash -s with other arguments
I have install.sh script which is located in server. I want to write one line code to download and run the script. Everything works fine until I am trying to set arguments It can’t recognize ‘-p’ as an argument but ‘abc’ can. How to set arguments in this situation starting with &…
NPM gives ELILIFECYCLE error when trying to run npm run build on linux
I’m trying to build the project with sudo npm run build on linux but it give me this error: package.json index.js Answer … run npm install –save react-qr-reader or yarn add react-qr-reader you have react-qr-code, but not react-qr-reader
How to connect to docker container from localhost
I created a docker container which is running 2 java processes – one of the processes is listening on port 4444 and should have access from browser hitting the following URL: http://{host}:4444/grid/console How do I hit this URL from my browser on the host – connect to the container on port 4444? …
How u-boot start instruction is found by ROM Code
I am trying to understand ARM Linux Boot Process. These are the things I understood: When reset button is pressed in any processor, it jumps to the reset vector or address, in case of ARM it is either 0x00 or 0xFFFF0000. This location contains the start up code or ROM Code or Boot ROM Code My query is how thi…
dup2 paramater order confusion
I have written this simple program: What i want is, redirect the output of ls – l to a file called “theFile.txt”. The code works as i expect. What confuses me here is the order of dup2 parameters. I believe that correct order should be dup2(1, fd) – considering fd as the newFD and 1 as…
Why does flock removes existing text from a file?
So, I am trying to get an exclusive lock on a text file using Flock and a line of text to that file however while doing so it removes whatever text was there earlier. So if the file had let’s say and after running the script I am expecting something like instead, all I get is why would it behave
Computation time of processor varies on execution, each time by using gettimeofday() in a C program
I am trying to compare the computation time for performance comparison using different C libraries with gettimeofday() by including time.h and sys/time.h header files. I used gettimeofday() at the start and end of my computation and took the difference. But each time I execute my C code, I get fluctuating tim…