Virtual machine has been very popular since the beginning of cloud service and due to the nature of cloud service, the system time is pre-set so adjust system time to desire time zone is necessary to avoid weird problems or incorrectness in the system.
Default vim color scheme can be very difficult to read sometimes, so change to other color scheme to make wordings easier to read is a good way to solve it.
Since CentOS7, rc.local is default set with permission 644, therefore it won't execute at system start up.
Requests were sent from RD department about multi language function on our website and they want to be done by using nginx rewrite function.
Treesize is a very handy software to calculate all the files and directories size in windows, and alternate choice for Linux with same function is ncdu.
Use yum to install nginx, php-fpm and php, with configurations, to run php web pages on centos7.