摘要：SQLSTATE[HY000] [2054] The server requested authentication method unknown to the client. In MySQL 8.0+, the default authentication plugin has changed 阅读全文

摘要：after installed php by $ sudo apt install php, we can check the php version by $php -v, to me ,it is 7.0. so in order to connect to mysql in $php -S l 阅读全文

摘要：firstly ,we can install the latest version of ruby through ruby`s official site, $./configure $make $sudo make install ,this is three cmd to install t 阅读全文