Yoon KimAWS ALB redirection issue; http -> httpsIf you’re using AWS ALB (application load balancer) and your website is running on https only, you might need to redirect all http traffics…Jul 28, 20177Jul 28, 20177
Yoon KimTomcat — Too many open filesI guess if you didn’t change anything on your ubuntu box then your default settings are like this.Jul 5, 20171Jul 5, 20171
Yoon KimHaving an issue with Facebook API 2.3 when you’re using old facebook-php-SDKIf you’re using “base_facebook.php(v3.2.3 — old facebook-php-sdk; no longer maintained)”, you’re probably having an issue with Facebook…Mar 29, 2017Mar 29, 2017
Yoon KimCould not increase number of max_open_files to more than 1024It was working well, but suddenly, got logs below after Mysql server was restarted. (Mysql 5.7.x / Ubuntu 16.04.1 LTS)Feb 2, 20171Feb 2, 20171
Yoon Kim12.25–2강 다항식의 연산(2)3:25 — 곱셉공식; (http://mathbang.net/249,http://mathbang.net/250) - (a+b)² = (a+b)(a+b) = a²+ab+ba+b² = a²+2ab+b² (합의 공식) - (a-b)² =…Dec 26, 2016Dec 26, 2016
Yoon Kim12.6 — 1강 다항식의 연산5:22 — 용어정리; 다항식(단항식++), 동류항, 특정 문자에 관해 내림차순(H->L), 오른차순(L->H)Dec 6, 2016Dec 6, 2016