Linux

tldr -u  # update tldr

diff a b
md5sum a b

find . -name "*.[ch]" | xargs grep "#include" | sort | uniq

sed -i 's/focal/jammy/g' /etc/apt/sources.list

run-shell ~/.tmux/tmux-resurrect/resurrect.tmux
run-shell ~/.tmux/tmux-continuum/continuum.tmux

C-b + C-s: save
C-b + C-r: reload

//左对齐 20 位并且前导 10 个 0
printf("%-20.010X",0x3f3f3f3f)

#include <sys/types.h>
#include <regex.h>

int regcomp(regex_t *preg, const char *regex, int cflags);
	Prepare your regex for fast processing
int regexec(const regex_t *preg, const char *string, size_t nmatch, regmatch_t pmatch[], int eflags);
	Do the matching
void regfree(regex_t *preg);
	Free your compiled regex for a new "compiling"
size_t regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size);
	Retrieve some more information on why the regexec() failed

///////////////////////////////////////////
#include <sys/types.h>
#include <regex.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
  regex_t regex;
  int reti;
  char msgbuf[100];

  /* Compile regular expression */
  reti = regcomp(&regex, "(.*)", REG_EXTENDED);
  if (reti)
  {
    fprintf(stderr, "Could not compile regex\n");
    exit(1);
  }

  /* Execute regular expression */
  regmatch_t pmatch;
  reti = regexec(&regex, "-(asdf)adsf", 1, &pmatch, 0);
  // 第三个参数如果是 0，则仅判断是否匹配
  printf("%d %d",pmatch.rm_so,pmatch.rm_eo);
  if (!reti)
  {
    puts("Match");
  }
  else if (reti == REG_NOMATCH)
  {
    puts("No match");
  }
  else
  {
    regerror(reti, &regex, msgbuf, sizeof(msgbuf));
    fprintf(stderr, "Regex match failed: %s\n", msgbuf);
    exit(1);
  }

  /* Free compiled regular expression if you want to use the regex_t again */
  regfree(&regex);

  return 0;
}

some examples
((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)

# alias
alias apigen="goctl api go -api *.api -dir ../  --style=goZero"
alias proxy="source /bin/proxy.sh"
alias ll="ls -alF"
alias la="ls -A"
alias l="ls -CF"
alias say="echo"

. /bin/proxy.sh set

# Enable Powerlevel10k instant prompt. Should stay close to the top of ~/.zshrc.
# Initialization code that may require console input (password prompts, [y/n]
# confirmations, etc.) must go above this block; everything else may go below.
if [[ -r "${XDG_CACHE_HOME:-$HOME/.cache}/p10k-instant-prompt-${(%):-%n}.zsh" ]]; then
  source "${XDG_CACHE_HOME:-$HOME/.cache}/p10k-instant-prompt-${(%):-%n}.zsh"
fi

# If you come from zsh you might have to change your $PATH.
# export PATH=$HOME/bin:/usr/local/bin:$PATH

# Path to your oh-my-zsh installation.
export ZSH="$HOME/.oh-my-zsh"

# Set name of the theme to load --- if set to "random", it will
# load a random theme each time oh-my-zsh is loaded, in which case,
# to know which specific one was loaded, run: echo $RANDOM_THEME
# See https://github.com/ohmyzsh/ohmyzsh/wiki/Themes
# ZSH_THEME="robbyrussell"
ZSH_THEME="powerlevel10k/powerlevel10k"

# Set list of themes to pick from when loading at random
# Setting this variable when ZSH_THEME=random will cause zsh to load
# a theme from this variable instead of looking in $ZSH/themes/
# If set to an empty array, this variable will have no effect.
# ZSH_THEME_RANDOM_CANDIDATES=( "robbyrussell" "agnoster" )

# Uncomment the following line to use case-sensitive completion.
# CASE_SENSITIVE="true"

# Uncomment the following line to use hyphen-insensitive completion.
# Case-sensitive completion must be off. _ and - will be interchangeable.
# HYPHEN_INSENSITIVE="true"

# Uncomment one of the following lines to change the auto-update behavior
# zstyle ':omz:update' mode disabled  # disable automatic updates
# zstyle ':omz:update' mode auto      # update automatically without asking
# zstyle ':omz:update' mode reminder  # just remind me to update when it's time

# Uncomment the following line to change how often to auto-update (in days).
# zstyle ':omz:update' frequency 13

# Uncomment the following line if pasting URLs and other text is messed up.
# DISABLE_MAGIC_FUNCTIONS="true"

# Uncomment the following line to disable colors in ls.
# DISABLE_LS_COLORS="true"

# Uncomment the following line to disable auto-setting terminal title.
# DISABLE_AUTO_TITLE="true"

# Uncomment the following line to enable command auto-correction.
# ENABLE_CORRECTION="true"

# Uncomment the following line to display red dots whilst waiting for completion.
# You can also set it to another string to have that shown instead of the default red dots.
# e.g. COMPLETION_WAITING_DOTS="%F{yellow}waiting...%f"
# Caution: this setting can cause issues with multiline prompts in zsh < 5.7.1 (see #5765)
# COMPLETION_WAITING_DOTS="true"

# Uncomment the following line if you want to disable marking untracked files
# under VCS as dirty. This makes repository status check for large repositories
# much, much faster.
# DISABLE_UNTRACKED_FILES_DIRTY="true"

# Uncomment the following line if you want to change the command execution time
# stamp shown in the history command output.
# You can set one of the optional three formats:
# "mm/dd/yyyy"|"dd.mm.yyyy"|"yyyy-mm-dd"
# or set a custom format using the strftime function format specifications,
# see 'man strftime' for details.
# HIST_STAMPS="mm/dd/yyyy"

# Would you like to use another custom folder than $ZSH/custom?
# ZSH_CUSTOM=/path/to/new-custom-folder

# Which plugins would you like to load?
# Standard plugins can be found in $ZSH/plugins/
# Custom plugins may be added to $ZSH_CUSTOM/plugins/
# Example format: plugins=(rails git textmate ruby lighthouse)
# Add wisely, as too many plugins slow down shell startup.
plugins=(
    z
    docker
    git
    sudo
    zsh-autosuggestions
    # zsh-syntax-highlighting
)

source $ZSH/oh-my-zsh.sh

# User configuration

# export MANPATH="/usr/local/man:$MANPATH"

# You may need to manually set your language environment
# export LANG=en_US.UTF-8

# Preferred editor for local and remote sessions
# if [[ -n $SSH_CONNECTION ]]; then
#   export EDITOR='vim'
# else
#   export EDITOR='mvim'
# fi

# Compilation flags
# export ARCHFLAGS="-arch x86_64"

# Set personal aliases, overriding those provided by oh-my-zsh libs,
# plugins, and themes. Aliases can be placed here, though oh-my-zsh
# users are encouraged to define aliases within the ZSH_CUSTOM folder.
# For a full list of active aliases, run `alias`.
#
# Example aliases
# alias zshconfig="mate ~/.zshrc"
# alias ohmyzsh="mate ~/.oh-my-zsh"

# To customize prompt, run `p10k configure` or edit ~/.p10k.zsh.
[[ ! -f ~/.p10k.zsh ]] || source ~/.p10k.zsh

#ccache
export PATH="/usr/lib/ccache:$PATH"
export NEMU_HOME=/home/loomt/CSLearning/PA/nemu
export AM_HOME=/home/loomt/CSLearning/PA/abstract-machine
# go
#根目录
export GOROOT=/usr/local/go
#工作目录
export GOPATH=/home/loomt/go
#bin目录
export GOBIN=$GOPATH/bin
export PATH=$PATH:$GOPATH
export PATH=$PATH:$GOBIN
export PATH=$PATH:$GOROOT/bin