[shell]输出内容到剪切板

commandline和GUI下的clipboard的交互
Mac下
echo $PATH | pbcopy，copy to clipboard
echo "$(pbpaste -Prefer text)"，copy from clipboard

Linux下，首先需要安装xsel
echo $PATH | xsel --clipboard，copy to clipboard
echo "$(xsel --output --clipboard)"，copy from clipboard

Windows下，clip是需要另外安装的外部程序
set %path% | clip

Cygwin下
echo $PATH | putclip，copy to clipboard
echo "$(getclip)"，copy from clipboard