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对于很多使用终端的Linux与Mac系统用户，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。 本文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 $ brew install tldr-pages/tldr/tldr Crystal client $ brew install porras/tap/tlcr Go client $ go get github.com/pranavraja/tldr (or platform binaries) Node.js client $ npm install -g tldr Perl5 client $ cpanm App::tldr Python clients tldr-python-client $ pip install tldr tldr.py $ pip install tldr.py Ruby client $ gem install tldrb Bash client https://github.com/raylee/tldr Web client https://ostera.github.io/tldr.jsx Android clients tldr-viewer, available on Google Play https://github.com/gianasista/tldr-viewer https://play.google.com/store/apps/details?id=de.gianasista.tldr_viewer tldroid, available on Google Play 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 https://github.com/freesuraj/TLDR https://itunes.apple.com/sg/app/tldr-man-page/id1073433250?mt=8 tldr-pages, available on App Store https://github.com/mflint/ios-tldr-viewer https://itunes.apple.com/us/app/tldt-pages/id1071725095?ls=1&mt=8
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： 1.$ 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 2.$ 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！
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