linux Questions

Ubuntu – GCC Output Symbol not Relocatable with -fPIC

November 14, 2024
TheAhmad
2 Answers

On an Ubuntu 24.04, using the default GCC-13.2 compiler I compiled a source file with -fPIC option to produce relocatable binary: /usr/bin/c++ -v -DBPFTIME_BUILD_WITH_LIBBPF=1 -DSPDLOG_COMPILED_LIB -Dbpftime_text_segment_transformer_EXPORTS -I/home/ahmad/Programs/bpftime/build/build/FridaGum-prefix/src/FridaGum -I/home/ahmad/Programs/bpftime/third_party/spdlog/include -fno-omit-frame-pointer -O3 -DNDEBUG -std=gnu++20 -fPIC -o text_segment_transformer.cpp.o -c /home/ahmad/Programs/bpftime/attach/text_segment_transformer/text_segment_transformer.cpp The compiler output…

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Working with files in C in Ubuntu (WSL), program crashing

November 12, 2024
Adrian Sevic
2 Answers

I have a problem I cant solve for the past 2 weeks. In my school we have a course where we are learning about opoerating systems and we are forced to work within WSL environment, in Ubuntu. One of the…

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Ubuntu – QQmlComponent: Component is not ready – module "QtCharts" is not installed

October 30, 2024
gagiuntoli
2 Answers

I am trying to render the QtCharts example on the main page: import QtCharts ... ChartView { title: "Line Chart" anchors.fill: parent antialiasing: true LineSeries { name: "Line" XYPoint { x: 0 y: 0 } ... } } I have…

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Ubuntu – jq referencing an index/key with its inner values

October 28, 2024
Luis Ramirez
2 Answers

I have a JSON similar to the following: File: my_data.json { "hosts": { "1.2.3.4": { "name": "name4", "env": "test", "options": "" }, "1.2.3.5": { "name": "name5", "env": "prod", "options": "opt1,opt2" }, "1.2.3.6": { "name": "name6", "env": "qa", "options": "" },…

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Debian – live_grep on Neovim is not working as expected even after installing ripgrep and fdfind. Neovim cannot find them in external dependencies

October 27, 2024
TigerDriver03
2 Answers

I'm new to neovim and trying to get started with configuring my system. I am running Debian system and have flatpak'd Neovim. I think this may be a cause for the issue I am facing. This is my current 'init.lua'…

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Ubuntu – Linux: Catching Ctrl+C breaks stdin

October 26, 2024
RobinLe
2 Answers

I'm writing a test application for a console text input library. The idea of that part of the library is to just treat any input as a regular text input, even Ctrl+[letter] combinations. And for the most part, it works…

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Docker – Prepending command with SHELL doesn't work

October 25, 2024
Zephyr
2 Answers

I have script.sh as below: MYVAR=world I then have a Dockerfile as below: FROM redhat/ubi8 COPY script.sh /script.sh # Source the script and echo. Expected to see: hello world RUN source /script.sh && echo hello $MYVAR # Run echo without…

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Ubuntu – Can't get "read" to work properly in bash script

October 24, 2024
Tim Leon
2 Answers

I have the following script: echo "User already exists, delete user? [Y/n] " read -r -n 1 yn echo "$yn was pressed" When I run the script: Pressing y or Y (without [Enter]) displays the keystroke on the screen. Pressing…

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Ubuntu – Source code of Linux kernel not found when using GDB -tui?

October 18, 2024
evstack
2 Answers

I am booting a Linux kernel in Qemu using an Ubuntu machine. I can successfully set breakpoints on certain functions, like "start_kernel". However, when enabling the -tui option for GDB, I get a "Source Not Available" error in the top…

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Ubuntu – Is it possible to make the linux cksum command zero out?

October 17, 2024
Ed K
2 Answers

My goal is just to self-verify the consistency of a file without sending any additional files or signatures. I'd like to append a CRC at the end in a way that creates a predictable output from cksum on the command…

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