Linux – Make immutable a file

The chattr command is used by system administrators to restrict the users from changing a file in a particular way or even the administrator can by mistake delete a critical file because of a mis-typed command. But if the immutable flag is set, these mistakes can be avoided. Read More …

Convert .pfx SSL certificate to .key or .pem format

In the last years Internet have seen a lot of changes, especially in terms of security standars and requirements for almost every website published on the web. Read More …

VMware – Reset the root password for VCSA 6.x

Usually, it’s a good practice to store all passwords in something like KeePass or some other password management tool. You Read More …

Change the root password for MySQL (XAMPP)

By default, when you install XAMPP in your windows machine, the root password for the MySQL is set to empty. Read More …

Restarting the Management agents (VMware ESX-ESXi)

The management agents synchronize VMware components and let you access the ESXi host through the vSphere Client or vCenter Server. Read More …

Limit access SSH with Match option (openSSH)

OpenSSH has a lot of nice features which let you control how it is used. For example, you can disallow Read More …