chmod

First, the directory permissions set is very important: can effectively prevent hackers upload trojan files. If you pass chmod 644 *-R, the PHP file has no access. If you pass chmod 755 *-R, the PHP file has a high permission. So you need to set

SSH is the abbreviation for Secure Shell. SSHD Service is one of the most frequently used services in Linux systems. Because it avoids the security hidden danger of transmitting the password, content and the middle person attack, it is often the

Problem: In the 1.2.0 of Hadoop, because a single disk failure causes the Datanode node to fail, most of the datanode nodes in the production environment have more than one disk, and we now need a way for datanode to fail the entire node with a

The method of using MySQL root to extract power The MySQL 5.x introduces a system function that executes commands that can be executed by using this function when MySQL is logged in as root, which is, of course, within the purview of the permission.