Linux命令行学习神器 TLDR

对于很多使用终端的Linux和Mac用户，使用Terminal最难的就是要记住众多的Linux命令了。比如：ssh，curl，grep等，经常会记不住参数的顺序。这个时候通常在使用的时候通过man阅读长长的文档，从中对比一个个参数，这样费时又费力。

今天要介绍的一个好用的工具叫tldr，tldr全称Too long, Don’t read，翻译成中文就是[太长不读]。tldr根据二八原则将命令的常用场景给出示例，让人一看就懂。

tldr项目地址: https://github.com/tldr-pages/tldr

tldr安装

tldr有很多种语言版本，安装也很简单，各种包管理工具都支持。

安装方式如下

C++ client

1	$ brew install tldr-pages/tldr/tldr

Crystal client

1	$ brew install porras/tap/tlcr

Go client

1	$ go get github.com/pranavraja/tldr (or platform binaries)

Node.js client

1	$ npm install -g tldr

Perl5 client

1	$ cpanm App::tldr

Python clients

tldr-python-client

1	$ pip install tldr

tldr.py

1	$ pip install tldr.py

Ruby client

1	$ gem install tldrb

Bash client

1	https://github.com/raylee/tldr

Web client

1	https://ostera.github.io/tldr.jsx

Android clients

tldr-viewer, available on Google Play

1 2	https://github.com/gianasista/tldr-viewer https://play.google.com/store/apps/details?id=de.gianasista.tldr_viewer

tldroid, available on Google Play

1 2	https://github.com/hidroh/tldroid https://play.google.com/store/apps/details?id=io.github.hidroh.tldroid

iOS clients

tldr-man-page, available on App Store

1 2	https://github.com/freesuraj/TLDR https://itunes.apple.com/sg/app/tldr-man-page/id1073433250?mt=8

tldr-pages, available on App Store

1 2	https://github.com/mflint/ios-tldr-viewer https://itunes.apple.com/us/app/tldt-pages/id1071725095?ls=1&mt=8

更多客户端可参考: https://github.com/tldr-pages/tldr

tldr使用

tldr命令格式

$ tldr -h 
usage: tldr [-h] [-o {linux,osx,sunos}] command [command ...]

Python command line client for tldr

positional arguments:
  command               command to lookup

optional arguments:
  -h, --help            show this help message and exit
  -o {linux,osx,sunos}, --os {linux,osx,sunos}
                        Override the operating system [linux, osx, sunos]

来看几个例子

$ tldr ssh
#SSH                                                                           
                                                                                
  Secure Shell is a protocol used to securely log onto remote systems.          
  It can be used for logging or executing commands on a remote server.          
                                                                                
- Connect to a remote server:                                                   
                                                                                
  ssh username@remote_host                                                      
                                                                                
- Connect to a remote server with a specific identity (private key):            
                                                                                
  ssh -i /path/to/key_file username@remote_host                                 
                                                                                
- Connect to a remote server using a specific port:                             
                                                                                
  ssh username@remote_host -p 2222                                              
                                                                                
- Run a command on a remote server:                                             
                                                                                
  ssh remote_host command -with -flags                                          
                                                                                
- SSH tunneling: Dynamic port forwarding (SOCKS proxy on localhost:9999):       
                                                                                
  ssh -D 9999 -C username@remote_host                                           
                                                                                
- SSH tunneling: Forward a specific port (localhost:9999 to slashdot.org:80):   
                                                                                
  ssh -L 9999:slashdot.org:80 username@remote_host                              
                                                                                
- SSH enable agent forward:                                                     
                                                                                
  ssh -A username@remote_host

$ tldr curl
# curl                                                                          
                                                                                
  Transfers data from or to a server.                                           
  Supports most protocols including HTTP, FTP, POP.                             
                                                                                
- Download a URL to a file:                                                     
                                                                                
  curl "URL" -o filename                                                        
                                                                                
- Send form-encoded data:                                                       
                                                                                
  curl --data name=bob http://localhost/form                                    
                                                                                
- Send JSON data:                                                               
                                                                                
  curl -X POST -H "Content-Type: application/json" -d '{"name":"bob"}' http://localhost/login
                                                                                
- Specify an HTTP method:                                                       
                                                                                
  curl -X DELETE http://localhost/item/123                                      
                                                                                
- Head request:                                                                 
                                                                                
  curl --head http://localhost                                                  
                                                                                
- Include an extra header:                                                      
                                                                                
  curl -H "X-MyHeader: 123" http://localhost                                    
                                                                                
- Pass a user name and password for server authentication:                      
                                                                                
  curl -u myusername:mypassword http://localhost

怎么样，比man看起来舒服多了吧？还等什么，赶紧上手体验一下吧！

参考文档

http://www.google.com
https://github.com/tldr-pages/tldr
https://codingstyle.cn/topics/26

tldr安装

tldr使用

参考文档

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