http://php.net/manual/zh/install.pecl.phpize.php //phpize的作用
http://man.linuxde.net/chmod //chmod命令的详细介绍
https://www.cnblogs.com/lin1/p/5651828.html //给php单独安装扩展
https://blog.csdn.net/wzx19840423/article/details/79071928 //php的重启
https://blog.csdn.net/ivnetware/article/details/51246871 //crontab任务的增删改查 sudo sed -i ‘/^$/d’ /var/spool/cron/centos
https://www.cnblogs.com/sien6/p/8056315.html //ls -l命令 ls -l -t按时间倒序
https://blog.csdn.net/solmyr_biti/article/details/53955141 //php-fpm进程数错误
https://blog.csdn.net/u011608531/article/details/50756112 //PHP常见编译安装时常见错误