tldr

一个合理的解释是：too long dont read

查看man文档实在是太长了， 大家都很忙， 哪里有那么多时间看，即使看了，一个命令参数那么多，谁记得住。所以tldr是一个更加简单的、由社区驱动的 man pages。 用它可以直接查看命令的常用例子

me@ubuntu:~$ tldr scp
scp
Secure copy.
Copy files between hosts using Secure Copy Protocol over SSH.

 - Copy a local file to a remote host:
   scp {{path/to/local_file}} {{remote_host}}:{{path/to/remote_file}}

 - Copy a file from a remote host to a local folder:
   scp {{remote_host}}:{{path/to/remote_file}} {{path/to/local_dir}}

 - Recursively copy the contents of a directory from a remote host to a local directory:
   scp -r {{remote_host}}:{{path/to/remote_dir}} {{path/to/local_dir}}

 - Copy a file between two remote hosts transferring through the local host:
   scp -3 {{host1}}:{{path/to/remote_file}} {{host2}}:{{path/to/remote_dir}}

 - Use a specific username when connecting to the remote host:
   scp {{path/to/local_file}} {{remote_username}}@{{remote_host}}:{{path/to/remote_dir}}

 - Use a specific ssh private key for authentication with the remote host:
   scp -i {{~/.ssh/private_key}} {{local_file}} {{remote_host}}:{{/path/remote_file}}