tips.md

useful tips

• Software Architecture

  • Michael-F-Bryan Tag: Architecture
    • How I Translate Feature Requests into Code

• OOP cheatsheet

  • tl;dr

    • use with inheritance
      • delegation
      • composition
      • aggregation
    • DRY - don't repeat yourself
    • How I Declare My class And Why

  • Inheritance, why is bad?

  • How to Learn Software Design and Architecture - a Roadmap

  • SOLID OOP

    • S.O.L.I.D: The First 5 Principles of Object Oriented Design
      • Простое объяснение принципов SOLID
      • Как с помощью принципа единственной ответственности писать гибкий и модульный код
      • Covariance and contravariance in subtyping
        • Why can't I pass std::vector<Child*> as std::vector<Parent*>?

• Backup + Restore of the system

  • Howto: Backup and restore your system!
    • Backup:

    sudo su
    cd /
    tar cvpjf backup.tar.bz2 --exclude=/proc --exclude=/lost+found --exclude=/backup.tar.bz2 --exclude=/mnt --exclude=/sys /
    

    • Restore:

    tar xvpfj backup.tar.bz2 -C /
    mkdir proc
    mkdir lost+found
    mkdir mnt
    mkdir sys
    etc...

• Fstab doesn't mount with exec

• Distributed versioning systems

  • git & github & gitlab

    • git LFS

    • Tig: text-mode interface for Git

    • Lazygit — псевдографический консольный клиент для Git

    • Git remote access

      • [s there a way to skip password typing when using https:// on GitHub?](Is there a way to skip password typing when using https:// on GitHub?)
      • How to use git with gnome-keyring integration
        • tl;dr

        $ sudo pacman -S libgnome-keyring
        $ pushd /usr/share/git/credential/gnome-keyring
        $ sudo make
        $ popd
        $ git config --global credential.helper /usr/share/git/credential/gnome-keyring/git-credential-gnome-keyring

      • Git на сервере - Создание открытого SSH-ключа
      • Как настроить подключение к удаленному Git репозиторию

    • Git и Github. Простые рецепты

    • Моя шпаргалка по работе с Git

    • Mary Rose Cook on git

      • Mary Rose Cook blog
      • github for maryrosecook.com

    • Revert Git repo to a previous commit

      • How to revert to origin's master branch's version of file

    • git returns http error 407 from proxy after CONNECT

    • Git Basics - Tagging

    • Git delete a remote/local branch or tag

    • How to change your commit messages in Git?

    • How to: Delete a remote Git tag

      • delete tag

      git tag -d v0.2.3
      git push origin :refs/tags/v0.2.3

      • pushing new tags to remote

      git push --tags

    • 19 советов по повседневной работе с Git

    • Достаточно Git-а, чтобы быть (менее) опасным

    • GitLab rename branch and start over on another

    • git checkout tag, git pull fails in branch

      git push -u origin master
      git pull origin master
      git pull
      git branch --set-upstream-to=origin/master master
      git pull
      git branch -u origin/master
      git branch --set-upstream-to=origin/master master
      git branch -u origin/master

    • Reset Demystified

    • A Git Horror Story: Repository Integrity With Signed Commits

    • constructive git critique

    • another point of view on darcs vs. git

    • Как оформлять коммиты, чтобы потом не было больно

    • Git: Squash your latests commits into one

      • How to Squash Multiple Commits Into One with Git
      • Squash my last X commits together using Git

    • git rebase vs. merge

    • git rebase memo

    git rebase origin/master
    git status
    <fix conflicts>
    git add <changed>
    git rebase --continue
    git push origin my-branch --force
    <repeat>

    • aborting & syncing with origin/master

      git rebase --abort
      git merge --abort
      git checkout -B master origin/master
      ...
      git push origin master:master
      ...

    • Syncing a fork

    • Как удалить сабмодуль в git?

    • Merging a subdirectory from another repo via git-subtree

    • How to import existing Git repository into another?

    git subtree add -P u-boot /scratch/tegra-sources/u-boot_nvidia_distribution/u-boot master

    • subtree import of the subfolder

      • Add subdirectory of remote repo with git-subtree
        tl;dr

      git subtree split -P modules/my_module -b temporary-split-branch
      git subtree add -P prefix-name/  /path-to-repo temporary-split-branch

    • Git - Find when a method is removed
      tl;dr

      git log -c -S'methodName' /path/to/file.cpp

    • Support .ssh/config for specifying keys if ssh-agent fails

    • Adding an existing project to GitHub using the command line

    • Малоизвестные Git-команды

    • two-factor authentication in your Github account leads to inability to push via HTTPS
      tl;dr

    git remote -v
    git remote remove origin
    git remote add origin git@github.com:user/repo.git
    git push --set-upstream origin master

    • git - remote add origin vs remote set-url origin
      tl;dr
      below is used to a add a new remote:

    git remote add origin git@github.com:User/UserRepo.git

    below is used to change the url of an existing remote repository:

    git remote set-url origin git@github.com:User/UserRepo.git

    below will push your code to the master branch of the remote repository defined with origin and -u let you point your current local branch to the remote master branch:

    git push -u origin master

    • Mastering Markdown

  • gitlab

    • Gitlab : Managing Issues
    • GitLab Quick Actions

  • Pijul - distributed version control system written in Rust

• gcc unsorted question (TODO reorganize)

  • list gcc's pre-defined macros

    gcc -x c /dev/null -dM -E

  • Why doesn't GCC optimize aaaaaa to (aaa)(aaa)?

• Terminal emulators

  • A look at terminal emulators, part 1
  • A look at terminal emulators, part 2
  • 20 Useful Terminal Emulators for Linux
  • A tiling terminal emulator for Linux using GTK+ 3
    • Tilix is an advanced GTK3 tiling terminal emulator that follows the Gnome Human Interface Guidelines.

    Source vte.sh in bashrc
    
    Update ~/.bashrc (or ~/.zshrc if you are using zsh) to execute vte.sh directly, this involves adding the following line at the end of the file.
    
    if [ $TILIX_ID ] || [ $VTE_VERSION ]; then
        source /etc/profile.d/vte.sh
    fi

• Editors

  • What are the best programming text editors?

  • How to Select Columns in Editors (Kate, Vim, etc.)

  • modern ctags

    • A maintained ctags implementation
    • Universal-ctags Hacking Guide
      • C++ Declarations/References?
    • Hong's Technology Blog for ctags for C++

    ctags -R --c++-kinds=+p --fields=+iaS --extra=+q .

  • vim tips :set ff=unix

    • Vim: Squeezing the Text Editor’s Juice with More Features
    • How I revamped my Vim setup
    • Minimalist Vim Plugin Manager
    • A guide to setting up Vim for JavaScript development
    • You Should Be Using Tags In Vim
    • Browsing programs with tags
    • Find and replace using regular expressions
    • Understanding Vim’s Jump List
    • Что вам стоит знать, если вы начали изучение Vim
    • Configure coc.nvim for C/C++ Development
      • CCLS (C/C++) extension for coc.nvim
        • Is this extension in a usable state?

    pacman -S nodejs yarn
    yay -S ccls

    • A guide to modern Web Development with (Neo)vim
    • Vim’s absolute, relative and hybrid line numbers
      • How to turn off Vim relativenumber setting?
    • Об удобной навигации и отладке C++ кода в Vim
    • Vim - open new tab in buffer
      • tl;dr

      :Te

    • From Vim to Emacs+Evil chaotic migration guide
    • The Modern Vim Config with Pathogen
      • vim-pathogen
    • How to setup vim to edit both Makefile and normal code files?
    • How to Configure Vim like VSCode
      • init.vim
    • vim+scala
      • Editing Scala with vim
      • My Vim setup for Scala
        • vim, scala and ctags
      • integration of Scala into Vim
        • coding-scala-with-vim
    • VIM and Python -- a Match Made in Heaven
    • vim-multiple-cursors
    • Provide easy code formatting in Vim by integrating existing code formatters
    • Vundle vs. Pathogen
    • Разработка → VIM: зачем, если есть IDE, и как?
    • Vim vs. Neovim
      • How to setup Neovim
      • Setting up Neovim for C++ Development with LSP
      • Configure coc.nvim for C/C++ Development
      • How to Install and Set Up Neovim for Code Editing
      • Turning Neovim into a Full-Fledged Code Editor with Lua
    • Find in files within Vim
    • Vim: Substitute pattern between braces
    • Neovim 0.5+
      • Modern neovim
        • Taking Neovim to the Moon
        • Rust and Neovim - A Thorough Guide and Walkthrough
        • Neovim configuration for c++ and rust. Requires a nerd-font, vim-plug, fzf, ripgrep, rust-analyzer, and clangd
      • Awesome Neovim
      • Neovim with LSP and tree-sitter
      • nvim tree-sitter config
      • LunarVim
        • Neovim 0.5 and LunarVim Q&A Livestream
      • How to set up Neovim 0.5 (LSP, Treesitter, fuzzy finder, etc)
      • How to migrate from init.vim to init.lua?
        • Getting started using Lua in Neovim
        • dot dot dot
        • Neovim 0.5 features and the switch to init.lua
        • Configuring Neovim using Lua
        • Converting neovim config to lua
        • Neovim (0.5) Is Overpowering
        • How to set up Neovim 0.5 + Modern plugins (LSP, Treesitter, Fuzzy finder, etc)
        • Neovim Navigator tl;dr

      viB:s/word/replacement/gc

      or

      vi{:s...

    • The Ultimate Vim Distribution
    • Ultimate auto-completion system for Vim

    Plugin 'Shougo/neocomplcache'
    Plugin 'Shougo/neosnippet'
    Plugin 'Shougo/neosnippet-snippets'
    Open up Vim and start installation with :PluginInstall

    • YouComplete
      tl;dr

      ~/.vim/bundle/YouCompleteMe$ ./install.sh --clang-completer --racer-completer

      • libtinfo.so.* missing in Arch Linux
      • supercede: Package Details: ncurses5-compat-libs 6.1-1
        tl;dr

      gpg --keyserver keys.gnupg.net --recv-keys 702353E0F7E48EDB
      yay -S ncurses5-compat-libs

      • "ycmd server SHUTDOWN" error on Arch Linux
        • tl;dr

        yay -S libtinfo
        yay -S libtinfo5
        :YcmGenerateConfig
        :YcmRestartServer

      • Ubuntu : fatal error: pyconfig.h: No such file or directory # include <pyconfig.h>
        • tl;dr

        sudo apt install python3-dev
        python3 install.py --clang-completer --racer-completer

    • TabNine uses deep learning to help you write code faster.

    • CoC - Conquer of Completion

      • Install coc.nvim
        • Ubuntu install issues
          • Ubuntu 17 apt-get installs cmdtest instead of yarn
          • How to Install Yarn on Ubuntu 18.04
            tl;dr

          sudo apt install npm
          curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
          echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
          sudo apt update
          sudo apt install yarn
          yarn --version
          1.17.3

        • Fast check after install
          tl;dr

        :CocInfo
        :CocList diagnostics
        :CocInstall coc-json
        :CocInstall coc-rls
        :CocConfig
        :CocCommand
        

        tl;dr look into ~/.config/coc
rustup component add rls rust-analysis rust-src
      • Intellisense engine for vim8 & neovim, full language server protocol support as VSCode
        • coc.nvim : read it first
          • Floating windows
      • CoC Language servers : C++
        • C/C++/ObjC language server supporting cross references, hierarchies, completion and semantic highlighting
          • ccls : Build
          • Extend .ccls
        • [Guide] How to setup ctags with gutentags properly for almost every language
        • Rust support for coc.nvim
        • Guide To Turn Neovim Into A Rust IDE?

          • useful init for nvim

          • Why You Should Still Use Neovim

            • [RFC] Built-in LSP Support

          • Amp: "a complete text editor for your terminal"

    • Demystifying multi file searches in vim and the command line

    • Use VIM as your RUST IDE

    • How to install NERDTree with Vundle?

    • NeoVim specific

      • Neovim ArchLinux notes
        tl;dr

      mkdir -p ~/.config/nvim/
      ln -s ~/.vimrc ~/.config/nvim/init.vim

      • rxrc/nvimrc
        • from nvimrc
      • NeoVim config files
      • GTK ui for neovim written in rust using gtk-rs bindings

    • Can't enter a tab character when previous character is not a tab or space in insert mode

    • 7 Vim Editors for Better Productivity in 2022

  • Emacs

    • Хорошо настроенный Emacs
    • Prelude is an enhanced Emacs 24 or 25 distribution that should make your experience with Emacs both more pleasant and more powerful

  • kate-config

    • Kate configuration for Rust

  • Textadept (Editor)

    • Textadept module for ctags
    • Git mirror of Mitchell's Textadept editor

  • Atom - The hackable text editor

    • atom github

    • Atom Flight Manual

    • Atom Keymaps In-Depth

      • Atom How to replace a keymap binding

    • Atom Editor Keyboard Shortcut Cheat Sheet

      • Line Manipulation
        1. ⌘ + ] / [ Indent/outdent current line.
        2. ⌘ + enter. Insert new line after current line.
        3. ⌘ + shift + enter. Insert new line before current line.
        4. ctrl + shift + k. Delete current line.
        5. ctrl + ⌘ + up/down. Move current line up/down.
        6. shift + ⌘ + d. Duplicate current line.
        7. ⌘ + j. Join current and next lines.
      • Auto indent code in Atom editor
        • TL;DR Package auto-indent exists to apply auto-indent to entire file with this shortcuts : ctrl+shift+i Package url : auto-indent

    • The Atom text editor and Rust

      • Software development and other things

      • atom Force file reload

      • atom/markdown-preview

      • atom/multi-cursor-plus

      • atom/Sublime Style Column Selection

        • TL;DR

        Platform    Modifier Key    Mouse Button
        Linux       Shift           Left
        

      • [Solved] disable alt+mouse "move window"?

        • How can I disable 'Alt' + mouse default behavior in KDE?
        • use 'Shift-MiddleMouse' for column selection
        • Automatically use hard tabs for Makefile buffers #3
        • Atom - The Arch Linux Development Package

    • performance issues

      • atom performance issues
        • Atom hangs on large directories/files and when window switching #9325
        • Render lines via tiles #6733
        • Find remaining performance bottlenecks for large files #6692

  • Slap is a sublime-like text editor which works inside the terminal.

    • Slap - sublime-like terminal-based text editor

  • Xi-editor - a modern editor with a backend written in Rust.

    • GTK frontend for the Xi text editor, written in Rust
      tl;dr
      yay -S tau-editor-git

    sudo pacman -S flatpak
    ...
    flatpak install flathub org.gnome.Tau
        Required runtime for org.gnome.Tau/x86_64/stable (runtime/org.freedesktop.Platform/x86_64/19.08) found in remote flathub
        Do you want to install it? [Y/n]: 
        
        org.gnome.Tau permissions:
            ipc wayland x11
        
        
        
                ID                                                       Branch               Remote                Download
         1. [✓] org.freedesktop.Platform                                 19.08                flathub               223.6 MB / 237.7 MB
         2. [✓] org.freedesktop.Platform.GL.default                      19.08                flathub                90.8 MB / 90.8 MB
         3. [✓] org.freedesktop.Platform.GL.nvidia-435-21                1.4                  flathub               103.3 MB / 103.3 MB
         4. [✓] org.freedesktop.Platform.Locale                          19.08                flathub               163.7 MB / 318.9 MB
         5. [✓] org.freedesktop.Platform.openh264                        19.08                flathub               594.2 kB / 593.4 kB
         6. [✓] org.gnome.Tau                                            stable               flathub                 4.6 MB / 4.6 MB
         7. [✓] org.gnome.Tau.Locale                                     stable               flathub                45.3 kB / 41.0 kB
        
                Installation complete.
    
    flatpak run org.gnome.Tau
    
        Note that the directories 
        
        '/var/lib/flatpak/exports/share'
        '$HOME/.local/share/flatpak/exports/share'
        
        are not in the search path set by the XDG_DATA_DIRS environment variable, so
        applications installed by Flatpak may not appear on your desktop until the
        session is restarted.
        
        Gtk-Message: 23:05:39.139: Failed to load module "canberra-gtk-module"
        Gtk-Message: 23:05:39.140: Failed to load module "canberra-gtk-module"

  • Monaco Editor

    • Monaco Editor repo

  • Collection of miscellaneous portable C snippets.

    • Debug trap portable
      • Is there a portable equivalent to DebugBreak()/__debugbreak?

• Technical typesetting

• ZeroMQ \zero-em-queue, \ØMQ:

  • source git
  • ØMQ Language Bindings
  • Scala binding for ZeroMQ http://www.zeromq.org/bindings:scala-binding

• MIT online courses

  • physics
  • special courses

• Linux distros specific

  • How to Keep ‘sudo’ Password Timeout Session Longer in Linux

  • systemd vs. init

    • RHEL7: How to get started with Systemd
    • The Story Behind ‘init’ and ‘systemd’: Why ‘init’ Needed to be Replaced with ‘systemd’ in Linux
    • ELI5: The SystemD vs. init/upstart controversy
    • Systemd Essentials: Working with Services, Units, and the Journal
    • Comparison of init systems
    • gentoo - systemd
    • How does systemd use /etc/init.d scripts?
    • systemds for upstart` users
    • journald
      • Logging message workflow with journald
      • systemd for Developers III : Logging to the Journal
        tl;dr

      #include <systemd/sd-journal.h>
      #include <unistd.h>
      #include <stdlib.h>
       
      int main(int argc, char *argv[]) {
              sd_journal_send("MESSAGE=Hello World!",
                              "MESSAGE_ID=52fb62f99e2c49d89cfbf9d6de5e3555",
                              "PRIORITY=5",
                              "HOME=%s", getenv("HOME"),
                              "TERM=%s", getenv("TERM"),
                              "PAGE_SIZE=%li", sysconf(_SC_PAGESIZE),
                              "N_CPUS=%li", sysconf(_SC_NPROCESSORS_ONLN),
                              NULL);
              return 0;
      }

      journalctl -o json-pretty MESSAGE="Hello World!"

      printf "hola\n\rbro\n\r" | systemd-cat -t HOLA-BRO-SLASH-R
      journalctl --sync
      journalctl -b -t HOLA-BRO-SLASH-R --no-pager --no-hostname

      • How can I send a message to the systemd journal from the command line?
      • How to configure systemd journal-remote?
      • LOGGING DONE RIGHT systemd-journal-upload & systemd-journal-remote setup
      • log4cplus
      • polltest

      #include <stdio.h>
      #include <stdlib.h>
      #include <string.h>
      #include <systemd/sd-journal.h>
      
      int main(int argc, char *argv[]) {
              int r;
              sd_journal *j;
              r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY);
              if (r < 0) {
                      fprintf(stderr, "Failed to open journal: %s\n", strerror(-r));
                      return 1;
              }
      
              /* Opening the fd now means the first sd_journal_wait() will actually wait */
              r = sd_journal_get_fd(j);
              if (r < 0) {
                      fprintf(stderr, "Failed to get fd: %s\n", strerror(-r));
                      return 1;
              }
      
              r = sd_journal_seek_tail(j);
              if (r < 0) {
                      fprintf(stderr, "Failed to seek tail: %s\n", strerror(-r));
                      return 1;
              }
      
              if (getenv("seek"))
                      r = sd_journal_previous_skip(j, 0);
              else
                      r = sd_journal_next_skip(j, 0);
              if (r < 0) {
                      fprintf(stderr, "Failed to skip: %s\n", strerror(-r));
                      return 1;
              }
      
              r = sd_journal_wait(j, (uint64_t) -1);
              if (r < 0) {
                      fprintf(stderr, "Failed to wait for changes: %s\n", strerror(-r));
                      return 1;
              }
      
              for (;;)  {
                      const void *d;
                      size_t l;
                      r = sd_journal_next(j);
                      if (r < 0) {
                              fprintf(stderr, "Failed to iterate to next entry: %s\n", strerror(-r));
                              break;
                      }
                      if (r == 0) {
                              /* Reached the end, let's wait for changes, and try again */
                              r = sd_journal_wait(j, (uint64_t) -1);
                              if (r < 0) {
                                      fprintf(stderr, "Failed to wait for changes: %s\n", strerror(-r));
                                      break;
                              }
                              continue;
                      }
                      r = sd_journal_get_data(j, "MESSAGE", &d, &l);
                      if (r < 0) {
                              fprintf(stderr, "Failed to read message field: %s\n", strerror(-r));
                              continue;
                      }
                      printf("%.*s\n", (int) l, (const char*) d);
              }
              sd_journal_close(j);
              return 0;
      }

  • D-Bus

    • Understanding D-Bus

    • terse DBus introspection table - borrowed from D lang

    • Building object-oriented software with the D-Bus messaging system

    • Profiling and Optimizing D-Bus APIs

    • DBus: How to use variant

    • The Extended Introspection XML Format

    • CommonAPI C++ D-Bus in 10 minutes (from scratch)

      • CommonAPI C++ Tutorial
      • A framework for defining and transforming interfaces

    • Telepathy

      • Telepathy is a modular framework for real-time communications
      • Telepathy docs
      • Telepathy DbusSpec

    • QDBus : Send an array of objects (C++)

    • [dbus-cplusplus-devel] Variant type handling

    • Passing structure over d-bus - glib - example

    • [dbus-cplusplus-devel] Proposal: Give objects through dbus-c++

    • DBus speed presentation

    • dbus-c++ and g++-7.1

      • #18 Invalid template code in Threading class
      • tl;dr patch '/usr/include/dbus-c++-1/dbus-c++/dispatcher.h'

    • sdbus - and shutdown

      • The new sd-bus API of systemd
        • Patrick Williams' gists for sdbus
      • systemd-233/src/libsystemd/sd-bus/test-bus-objects.c
      • C++ bindings for systemd dbus APIs

      tl;dr poweroff

      gdbus introspect --system --dest org.freedesktop.systemd1 --object-path /org/freedesktop/systemd1
      ...
        interface org.freedesktop.systemd1.Manager {
          methods:
      ...
           PowerOff();
      ...
      

      sudo busctl call org.freedesktop.systemd1 /org/freedesktop/systemd1 org.freedesktop.systemd1.Manager PowerOff
      reboot: Power down

      #include <stdio.h>
      #include <stdlib.h>
      #include <systemd/sd-bus.h>
       
      int main(int argc, char *argv[])
      {
          sd_bus_error error = SD_BUS_ERROR_NULL;
          sd_bus_message *m = NULL;
          sd_bus *bus = NULL;
          const char *path;
          int r;
       
          // Connect to the system bus
          r = sd_bus_open_system(&bus);
          if (r < 0) {
              fprintf(stderr, "Failed to connect to system bus: %s\n", strerror(-r));
              goto finish;
          }
       
          // Issue the method call and store the respons message in m
          r = sd_bus_call_method(bus,
                                 "org.freedesktop.systemd1",           // service to contact
                                 "/org/freedesktop/systemd1",          // object path
                                 "org.freedesktop.systemd1.Manager",   // interface name
                                 "PowerOff",                           // method name
                                 &error,                               // object to return error in
                                 nullptr,                              // input signature
                                 nullptr);                             // 1st arg
          if (r < 0) {
              fprintf(stderr, "Failed to issue method call: %s\n", error.message);
              goto finish;
          }
       
          /* Parse the response message */
          r = sd_bus_message_read(m, "o", &path);
          if (r < 0) {
              fprintf(stderr, "Failed to parse response message: %s\n", strerror(-r));
              goto finish;
          }
       
          printf("Queued service job as %s.\n", path);
       
      finish:
          sd_bus_error_free(&error);
          sd_bus_message_unref(m);
          sd_bus_unref(bus);
       
          return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
      }

      g++ systemd-service-client.cc -o systemd-service-client `pkg-config --cflags --libs libsystemd`

  • WebSockets

    • ws: a Node.js WebSocket library
      • Autobahn test suite reports
        tl;dr

      npm install -g ws
      ...

  • How to shutdown Linux using C++ or Qt without call to “system()”?

    • Core utility library for all LXQt components http://lxqt.org

• profilers

  • gperftools: Fast, multi-threaded malloc() and nifty performance analysis tools

    • cpuprofile doc
    • pmu tools is a collection of tools and libraries for profile collection and performance analysis on Intel CPUs on top of Linux perf
    • Issue 278 in google-perftools: CPU profiler shows function addresses instead of function names
    • Instructing configure where libunwind lives: an answer to #error Cannot calculate stack trace: will need to write for your environment

  • IgProf, The Ignominous Profiler

  • OProfile

  • Heaptrack - A Heap Memory Profiler for Linux

  • http://milianw.de/blog/heaptrack-a-heap-memory-profiler-for-linux

  • Ubuntu Linux C++ error: undefined reference to 'clock_gettime' and 'clock_settime' : add -lrt

  • Memory profiling

    • How do VmRSS and resident set size match?

• purescript - A small strongly typed language that compiles to Javascript

  • github repo for purescript
  • a bunch of purescript repos

• How to extract RPM or DEB packages

• Linux From Scratch

  • LFS root
  • Beyond Linux® From Scratch (systemd edition)

• Docker+Kubernetes+FireCracker

  • Основы Kubernetes

    • How to install Kubernetes on Ubuntu 18.04 Bionic Beaver Linux
      • Install and Set Up kubectl

  • Поняв Docker

  • Post-installation steps for Linux

    sudo usermod -aG docker $USER

  • Образы и контейнеры Docker в картинках

  • Configure and troubleshoot the Docker daemon

    • Why docker container exits immediately
      • tl;dr run -it --entrypoint=/bin/bash custom-ubuntu-image

  • Docker - a way to give access to a host USB or serial device?

  • Starting Docker as Daemon on Ubuntu

    • tl;dr

    sudo service docker restart

  • add-apt-repository: command not found in Docker installation on Ubuntu

    • tl;dr docker command to add g++-7 to ubuntu16.04 docker image

    apt-get install -y software-properties-common python-software-properties && \
    add-apt-repository ppa:ubuntu-toolchain-r/test && \
    apt-get -qq update && \
    apt-get install -y -qq gcc-7 g++-7 gfortran-7 && \

  • docker run -> name is already in use by container

    • tl;dr docker rm $(docker ps -aq --filter name=CONTAINER_NAME)

  • Nvidia-docker - cant find libnvcuvid.so on building process

  • How to force Docker for a clean build of an image

    • tl;dr docker build --no-cache -t u12_core -f u12_core . docker system prune

  • Secure and fast microVMs for serverless computing

• CLion

  • Debugging in CLion
  • How to enable debugging for CLion
  • Commands available during CGDB mode

• Jenkins

  • Jenkins - Running a single job in master as well as slave
  • Hudson: Copy artifact from master to slave fails
  • A VERY QUICK GUIDE TO DEPLOYING ARTIFACTS WITH JENKINS

• Haskell (see also pandoc and diagrams links above)

  • Haskell Communities and Activities Report Twenty-Ninth Edition – November 2015
    • Haskell Programming from first principles

• Test-driven development

  • Test-driven development and unit testing with examples in C++
  • Google Unit Test
    • github repository
    • good intro from IBM
    • another good introduction
    • Google Test Primer
    • Google TestAdvanced
    • fast deployment in /usr/local

    git clone https://github.com/google/googletest && pushd googletest && mkdir build && cd build && cmake .. && sudo make install

• Scriptics selected tips

  • Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
  • The most recently changed file.
    • from here #5: 20 SHELL SCRIPTING QUESTIONS FOR PRACTICE

  ls -lrt | grep ^- | awk 'END{print $NF}'

  • What are the best open-source build systems for C/C++?
    • Meson
      • Investigate using Meson build system alongside CMake
      • Can you glob source code with meson?

• Getting started with Google Test (GTest) on Ubuntu

• Text search-and-replace (grep-like tools)

  • Grep все, что можно
  • amber (written in Rust - a good starting point)
    • ag - the silver searcher
  • ripgrep is faster than {grep, ag, git grep, ucg, pt, sift}
  • A simple, fast and user-friendly alternative to 'find'

• config formats : CSV vs. JSON vs. XML vs. YAML

  • XML, JSON, YAML, TOML for Configuration
  • Is CSV a good alternative to XML and JSON?
  • C/C++ JSON parser/generator benchmark
    • Tutorial for yaml-cpp

• Implementing an update/upgrade system for embedded Linux devices

  • SWUpdate - Software Update for Embedded Systems
    • Creating Linux based Embedded System Images with Yocto

• VirtualBox

  • VirtualBox on ArchLinux
    • GNU Parted

    parted /dev/sda
    (parted) mklabel gpt
    (parted) mkpart primary ext4 0% 100%
    mkfs.ext4 /dev/sda1
    tune2fs -L "/scratch" /dev/sda1

    • [Solved]Vboxdrv kernel module is not loaded
  • How To Install Ubuntu 14.04.3 LTS On VirtualBox

    sudo gpasswd -a <username> vboxusers
    VBoxManage list usbhost

• Checkpoint/Restore tool http://criu.org

  • CRIU, a project to implement checkpoint/restore functionality for Linux.

• Ext4

  • Ext4 Disk Layout
  • How to extract raw ext3 inode data from disk?
  • debugfs sample session:

  debugfs:  imap <262328>
  Inode 262328 is part of block group 32
          located at block 1048619, offset 0x0700
  debugfs:  show_inode_info <262328>
  Inode: 262328   Type: regular    Mode:  0644   Flags: 0x80000
  Generation: 933973137    Version: 0x00000000:00000001
  User:  1000   Group:  1000   Project:     0   Size: 948
  File ACL: 0    Directory ACL: 0
  Links: 1   Blockcount: 8
  Fragment:  Address: 0    Number: 0    Size: 0
   ctime: 0x5809deb8:1af1cef0 -- Fri Oct 21 12:24:08 2016
   atime: 0x5809deb8:1af1cef0 -- Fri Oct 21 12:24:08 2016
   mtime: 0x5809deb6:00000000 -- Fri Oct 21 12:24:06 2016
  crtime: 0x5809deb8:1af1cef0 -- Fri Oct 21 12:24:08 2016
  Size of extra inode fields: 32
  EXTENTS:
  (0):1082813

  • Determine the size of a block device
    • tl;dr with sudo

    #include <linux/fs.h>
    ...
    ioctl(file, BLKGETSIZE64, &file_size_in_bytes);

• bash

  • comparison operators

  if [ "${target_partname}" = "" -o "${target_partname}" = "APP" ]; then
  build_fsimg "$localsysfile" "$fillpat" \
  	    "$rootfssize" "$rootfs_type" "$rootfs_dir";
  fi;

  is equivalent to more readable

  if [[ "${target_partname}" == "" || "${target_partname}" == "APP" ]]; then
  ...

  • Check if string is neither empty nor space in shell script
  • How best to include other scripts?
  • Subtract time using date and bash
  • Bash script template (incl. logging functions)

• tmux

  • Краткая шпаргалка по tmux

• TCP backup

  • Chapter 2. The Transport Layer: TCP, UDP, and SCTP
    • Chapter 4. Elementary TCP Sockets
  • «Boost.Asio C++ Network Programming». Глава 4: Клиент и Сервер
  • Boost.Asio C++ Network Programming examples
  • SOCKETS - SERVER & CLIENT C++ - 2017
  • Error : “Transport endpoint is already connected”
    • Socket program gives “Transport endpoint is already connected” error
    • Reconnecting with connect() on restarted server returns -Transport endpoint is already connected
    • Starter UDP Server And Client in C++
    • Creating a TCP Server in C++ [Linux / Code Blocks]
    • How to Watch TCP and UDP Ports in Real-time

• The Illustrated TLS Connection Every byte of a TLS connection explained and reproduced

  • The Illustrated TLS Connection: Every byte explained

• VPP

  • VPP/What is VPP? The VPP platform is an extensible framework that provides out-of-the-box production quality switch/router functionality
  • VPP/Pulling, Building, Running, Hacking and Pushing VPP Code
    tl;dr

  git clone https://USERNAME@gerrit.fd.io/r/a/vpp
  

  • Building FD.io VPP 18.10 on Ubuntu 18.04 LTS with Mellanox DPDK PMD without OFED
  • VPP/Installing VPP binaries from packages
  • Arch Linux in the Arch User Repository (AUR)

• WHY MILLISECONDS MATTER : REST vs. gRPC

• Data transfer

  • So you want to write to a file real fast…
    • tl;dr

    ssize_t do_sendfile(int in, int out)
    {
        ssize_t t = filesize(in);
        off_t ofs = 0;
    
        while(ofs < t) {
            if(sendfile(out, in, &ofs, t - ofs) == -1) {
                assert(errno == EINTR);
                continue;
            }
        }
    
        return t;
    }

    • Use sendfile() to speed up transfers
  • high CPU load by 'mmcqd' in Ubuntu
  • Copy a file in a sane, safe and efficient way
  • Linux function to get mount points
    • tl;dr

    #include <stdio.h>
    #include <stdlib.h>
    #include <mntent.h>
    
    int main(void)
    {
      struct mntent *ent;
      FILE *aFile;
    
      aFile = setmntent("/proc/mounts", "r");
      if (aFile == NULL) {
        perror("setmntent");
        exit(1);
      }
      while (NULL != (ent = getmntent(aFile))) {
        printf("%s %s\n", ent->mnt_fsname, ent->mnt_dir);
      }
      endmntent(aFile);
    }

  • How to Get Available Filesystem Space on Linux: a C Function with a C++ Example ```

• Linking

  • Controlling the Exported Symbols of Shared Libraries
  • Control over symbol exports in GCC

• packaging

  • Hosting a Private Apt Repository on S3
  • Managing Apt Repos in S3 Using Lambda
    • apt-s3

• lock files

  • Linux: What is the difference between advisory lock and mandatory lock?
  • flock use case
  • lock files: 2.9 Synchronizing Resource Access Across Processes on Unix

• misc

  • nm vs “readelf -s”
    tl;dr

  nm -o -D *.so

  • fdupes – A Comamndline Tool to Find and Delete Duplicate Files in Linux
  • Is there a difference between using pmount and mount?
  • How To Quickly Generate A Large File On The Command Line (With Linux)
  • How to check programatically if the Ethernet cable is plugged in?

  tl;dr

  for i in $( ls /sys/class/net ); do echo $i; done
  dummy0
  enx00044b5acf64
  ip6tnl0
  lo
  rmnetctl
  sit0
  tunl0
  wlan0
  
  for i in $( ls /sys/class/net ); do echo -n $i: ; cat /sys/class/net/$i/carrier; done
  dummy0:cat: /sys/class/net/dummy0/carrier: Invalid argument
  enx00044b5acf64:1
  ip6tnl0:cat: /sys/class/net/ip6tnl0/carrier: Invalid argument
  lo:1
  rmnetctl:cat: /sys/class/net/rmnetctl/carrier: Invalid argument
  sit0:cat: /sys/class/net/sit0/carrier: Invalid argument
  tunl0:cat: /sys/class/net/tunl0/carrier: Invalid argument
  wlan0:1
  
  for i in $( ls /sys/class/net ); do echo -n $i: ; cat /sys/class/net/$i/operstate; done
  dummy0:down
  enx00044b5acf64:up
  ip6tnl0:down
  lo:unknown
  rmnetctl:down
  sit0:down
  tunl0:down
  wlan0:unknown

• Maximum length of the textual representation of an IPv6 address?

• Apache Thrift vs Protocol Buffers detailed comparison as of 2019

  • Apache Thrift Language Support

• Slimjet Browser Review – speed and utility

• Video Downloader

• Where does YouTube's offline feature store video files?

  • An extensible media player for Android

• Предметно-ориентированное проектирование на самом деле

• youtube-dl

  • youtube-dl, или как скачать видео с YouTube в качестве 1080p и выше
  • youtube-dl github repo
  • Скачиваем видео на Андроид с помощью youtube-dl

• Why you should use named pipes on Linux

• Can I share a file descriptor to another process on linux or are they local to the process?

• Take a screenshot of a area in xfce?

  xfce4-screenshooter -f

• Linux refresh

  • Примеры программ для операционной системы Linux
  • Основы программирования для Linux - terse Linux basics
  • Difference between r+ and w+ in fopen()
  • Duplicating file pointers?
  • Linux terminals, tty, pty and shell
  • Linux terminals, tty, pty and shell - part 2

• AWS

  • Configuration file cannot be used with CMake 3.22.0
    • Fix building AWS SDK for C++ with CMake 3.22.0
      • Fix AWS SDK for C++ configuration