MathJax Load Failed – WP Security Plugin
Issue After installing a WordPress security plugin call All-In-One WP Security, MathJax failed to load some JS including. Solution In the setting of the plugin, choose the tab Additional Firewall…
Grohe Bath/Shower Mixer Diverter Replacement
Background Prior to doing some research, don't trust any expert in plumbing service. It's because the return of the finding after research may be larger than expected. While so-called experts…
CentOS VM Client Can’t Boot Up
Issue VirtualBox client CentOS can't boot up with error message: [FAILED] Failed to start Virtual Machine and Container Registration Service. [FAILED] Failed to start Login Service. Solution Disable SELINUX config…
Jupyter Notebook on Boot Automatically
Issue After making the file to create a system service for jupyter notebook running on CentOS so as to start jupyter server automatically during system start up, the service successfully…
PHP 7
PHP 7 & Related Issues
Background After installing a WordPress plugin - WP Health, it's reminded that PHP5 had no longer been supported since late 2018, thus there may be risk in all WordPress websites.…
Centos7 Virtualmin Upgrade PHP7 MariaDB
This is my first blog after upgrading to WordPress 5.1 from ver.4.8. Yes, I never tried 5.0 as it's always risky to have a major upgrade to ver. x.0. The…
Cannot launch or remove iTunes from Mac High Sierra
Issue: when launching iTunes, it closed immediately after clicking the icon and appeared in half a second, then error screen appeared to ask for "ignore", "report", etc. Solution: Finder ->…
Mail Server Already Exists error iPhone iOS 11
Issue: When open an email box, error appeared on iPhone warning: Cannot verify Mail Server Identity. One solution for this problem is to delete that mail account on iPhone and…
McDonald’s New Seats
New seats are neither stylish nor user friendly. The only motive of using these uncomfortable seats without a back, I think, is to have customers staying shorter in the restaurant.
iOS 11 incompatibility
Issue: After updating iOS from version to 11, there are some installed apps not ready for this version. The worst is that I stored all important passwords in an app…