Advertisements I have a simple python file on a Linux VM import time while True: print("test") time.sleep(10) which I start with python test.py > test.log but even after a longer time that file is empty -rwxrwx— 1 root vboxsf 0 Sep 29 07:57 test.log Is the output cached or something? How can I make the… Read More Redirection of python script output to file not working

Advertisements I need to be able to create a very large text file from a small existing file. It needs to be as small as 1 MB and as big as 5 MB. Below is the initial starting file content. I am told one can use "dd" command or "fallocate", but I don’t see a… Read More How to create a large text-based file from repeating the contents of an exist file

Advertisements grep -r ‘foo’ | xargs sed -i ‘s/foo/bar/g’ I am using this command to replace all items of foo to bar. However, I want to only replace foo with bar in the first 5 files. Somehow I would need to cut the output of grep to just the first 5 items, or get xargs… Read More Limit output to 5 items

Advertisements I’m writing a python program where I do some os.system(cmd). I would need to extract one single word from the terminal output. The output contains a seire of informations. Inside this information, I only need the parameter address, as a simple string. How could I do? This is an example of the ouput: ——————————–… Read More How to extract a single word from an os.system command?

Advertisements I tried strftime, which has %z and %Z, but these are outputs like +0800 and PST. I’d like to get the longer name like America/Los_Angeles. Is there a function call to do this? >Solution : There is not a standard way to do this until C++20, and even then only the latest MSVC has… Read More how to get current time zone city name like America/Los_Angeles

Advertisements I am trying to develop a program that will display contents of a file and copies content of file1.txt to file2.txt in kali linux using command-line arguments. Here is the code: #include <stdio.h> #include <stdlib.h> #include <string.h> int main(int argc, char *argv[]){` char show[6] = "–show"; char copy[6] = "–copy"; char help[2] ="-h"; if(argc… Read More Command-Line Arguments Problem in C-language in Kali Linux?

Advertisements The task is to write a bash script to output a random word from a dictionary whose length is equal to the number supplied as the first command line argument. I tried to use awk command but it wasn’t help full. I am not able to pass argument in that. >Solution : I am… Read More Create a script to find a random word from a dictionary

Advertisements I want to display users in my linux whose name ends on number I tried grep ‘[0-9]’ /etc/passwd but it displays all lines containing numbers >Solution : You can use awk for this: awk -F: ‘{ print $1}’ /etc/passwd | grep ‘[0-9]$’ Alternatively you could also use cut cut -d: -f1 /etc/passwd | grep… Read More I want to display users of my linux whose name ends with a number

Advertisements According to FSH UNIX Sockets shall be created in /run (or on legacy distros in /var/run). I am trying to create a socket in a non-root application in that directory and get error 13. Is /run only for services started via systemd/init? If so, where do you put UNIX sockets from user applications? >Solution… Read More Cannot create UNIX socket in /run

Advertisements I have a file .txt like belowe AXN1 6.9e+07 69000000 AXN2 7.2e+07 72000000 AXN2 81000000 81000000 AXN3 1.18e+08 118000000 AXN4 7.7e+07 77000000 AXN9 8e+07 80000000 AXN11 800000 800000 AXN11 2.9e+07 29000000 AXN12 48000001 48000001 AXN18 4.8e+07 48000000 I want get that AXN1 69000000 69000000 AXN2 72000000 72000000 AXN2 81000000 81000000 AXN3 118000000 118000000 AXN4… Read More change scientific notation to number in Linux