Busy websites which has a lot of insert/delete transactions may introduce fragmentation in MySQL tables. Fortunately, users and optimize mysql tables with ‘OPTIMIZE TABLE’ command, but how to execute it automatically? Here’s how: The mysql-client package in Ubuntu installation comes with a tool called mysqlcheck which is handy for optimizing table in mysql. This command […]
Here’s how you can change hostname in Ubuntu server 1. Edit /etc/hostname, and change the hostname 2. Edit /etc/hosts file, and add the hostname to 127.0.0.1, or to any local machine ip 3. run, “sudo server hostname stop”, and “sudo server hostname start”
SYN-flood attack is commonly utilized as a mean to disrupt network communication and it is a form of (Distributed Denial-of-Service) DDOS attack. RFC4987 details common mitigation to deal with SYN-flood attack. However in this post, I’m going to share you the method that I use to reduce the risk of SYN-flood attack from my department […]
Due to the widespread of Litespeed 0-day attack which has affected local websites, it’s imperative for all sysadmin and website operator to patch/update and upgrade the security of the Litespeed web server. This attack is dangerous particularly because the attacker can gain shell access with the same privileges of the web server or the user […]