self configuration in linux

install

apt install build-essential

echo $PATH

bachrc

# git
alias mgs="git status"
alias mgc="git commit"
alias mgca="git commit --amend"

# cmake
alias mcmakec="rm -rf build && cmake -S . -B build"
alias mcmakeb="cmake --build build --parallel 32 "

ssh related

# generate ssh key pair
ssh-keygen -t ed25519 -C helianthus547@gmail.com

# login without password
ssh-copy-id -i ~/.ssh/id_ed25519.pub heli@192.168.1.113

# login without server information alias
vim ~/.ssh/config

Host WS
    HostName 192.168.1.113
    Port 22
    User heli
    IdentityFile ~/.ssh/id_ed25519

# verify git can ssh use
ssh -T git@github.com

change to nerd font

apt install -yqq fontconfig

wget -q -nv https://github.com/ryanoasis/nerd-fonts/releases/download/v3.2.1/JetBrainsMono.zip

unzip JetBrainsMono.zip -d ~/.local/share/fonts

fc-cache -fv

# macbook 
brew search font
brew install font-jetbrains-mono-nerd-font

# vscode
'JetbrainsMonoNL Nerd Font Mono'

tar

# zip
## -c create
tar -zcvf xxx.tar.gz source_file

# unzip
## -x extract
tar -zxvf xxx.tar.gz -C path

big or little endian

lscpu

#include <bit>
#include <iostream>
 
int main()
{
    if constexpr (std::endian::native == std::endian::big)
        std::cout << "big-endian\n";
    else if constexpr (std::endian::native == std::endian::little)
        std::cout << "little-endian\n";
    else
        std::cout << "mixed-endian\n";
}

union T {
    int i;
    char byte[];
} t;

int main()
{
    t.i = 1;
    t.byte[0] == 1;

    return 
}