Linux命令学习神器：tldr命令

Blog：博客园 个人

概述

github：https://github.com/tldr-pages/tldr

tldr(Too Long; Didn't Read)命令会自动显示命令常用样例，什么--help和man都弱爆了。

安装

首先需要安装Node.js client，然后通过npm命令安装即可

npm install -g tldr
sudo ln -s ~/.npm-global/lib/node_modules/tldr/bin/tldr /bin/tldr
# 更新本地库
tldr -u

语法

tldr command [options]

Options：

Options:
  -V, --version            output the version number
  -l, --list               List all commands for the chosen platform in the cache
  -a, --list-all           List all commands in the cache
  -1, --single-column      List single command per line (use with options -l or -a)
  -r, --random             Show a random command
  -e, --random-example     Show a random example
  -f, --render [file]      Render a specific markdown [file]
  -m, --markdown           Output in markdown format
  -o, --os [type]          Override the operating system [linux, osx, sunos]
  --linux                  Override the operating system with Linux
  --osx                    Override the operating system with OSX
  --sunos                  Override the operating system with SunOS
  -t, --theme [theme]      Color theme (simple, base16, ocean)
  -s, --search [keywords]  Search pages using keywords
  -u, --update             Update the local cache
  -c, --clear-cache        Clear the local cache
  -h, --help               output usage information

示例

[rohn@WhiteQueen ~]$ tldr grep

  grep

  Matches patterns in input text.
  Supports simple patterns and regular expressions.

  - Search for a pattern within a file:
    grep search_pattern path/to/file

  - Search for an exact string:
    grep -F exact_string path/to/file

  - Search for a pattern recursively in the current directory, ignoring non-text files:
    grep -RI search_pattern .

  - Use extended regular expressions (supporting ?, +, {}, () and |), in case-insensitive mode:
    grep -Ei search_pattern path/to/file

  - Print 3 lines of [C]ontext around, [B]efore, or [A]fter each match:
    grep -C|B|A 3 search_pattern path/to/file

  - Print file name with the corresponding line number for each match:
    grep -Hn search_pattern path/to/file

  - Use the standard input instead of a file:
    cat path/to/file | grep search_pattern

  - Invert match for excluding specific strings:
    grep -v search_pattern