huobazi

单用户模式装 rvn 

\curl -L https://get.rvm.io | bash -s stable --ruby

报错：

mkdir: cannot create directory `/usr/local/rvm': Permission denied
or
mkdir: 无法创建目录"/usr/local/rvm": 权限不够

nicky-zs

r"""Command-line tool to validate and pretty-print JSON

Usage::

    $ echo '{"json":"obj"}' | python -m json.tool
    {
        "json": "obj"
    }
    $ echo '{ 1.2:3.4}' | python -m json.tool
    Expecting property name: line 1 column 2 (char 2)