I am trying to write a Bash script that processes log files and extracts specific values based on given conditions. The logs are located at a provided URL and contain real web server log data. Each line in the logs…
I'm trying to use the signaling mechanism of UNIX to do some processing. To test out this functionality, I wrote the following code: #include <stdio.h> #include <signal.h> #include <stdlib.h> #include <unistd.h> #include <sys/wait.h> void handler(int sig) { printf("Received %d signal…
I have come across the command line wc < f1 f2 and it's not clear for me what is happening under the hood: $ echo -n 'a' > f1 $ wc f1 0 1 1 f1 $ echo -n 'bb'…
I'm trying to write a wrapper over Docker to propagate signals and standard output in a sensible way. First, Docker doesn't handle SIGPIPE nicely: $ docker run --rm ubuntu yes | head y y y y y y y y…
I need to make diff ignore the case of my inputs. Both inputs contain German umlauts like ä and Ä. Option -i successfully makes diff ignore the case of my input for other characters like a and A, but not…
I have few files under the current directory, ./a.txt ./b.txt ./dir1/c.txt ./dir1/d.txt When I execute find . -path './dir1' -prune -o -name "*.txt", as expected, it excludes everything under 'dir1' and prints, ./a.txt ./b.txt ./dir1 now if I switch the…
I have a bash script: #! usr/bin/env bash # test bash script to call python scripts cd ~/python for ((i = 1; i <= 2; i++)); do python3 test_0$i.py; done cd ~/bash that pulls test_0x.py files from the python directory…
Below is the code I'm compiling: #include <stdio.h> void main() { printf("Hello%cWorldn", 0); } Below is the compiler output: HelloWorld Bing Chat-GPT response:start Below is the same output by Bing chat-gpt in creative mode Copilot: The output of printf("Hello%cWorldn", 0)…
4 years ago, I using apt-cyg can install Python2.7.x directly, successfully, without any error But now, I can't find Python2 in cygwin list so I try to through complipe source on cygwin, and get failed I also try to through…
Reading The Unix Programming Environment by Brian W. Kernighan and Rob Pike. Working on an exercise, where one should find all palindromes in a wordlist using grep -E. The most concise solution I've been able to find online and understand…