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 …

HTTP Strict Transport Security (Apache – NGINX – Lighttp)

HTTP Strict Transport Security (often abbreviated as HSTS) is a security feature that lets a web site tell browsers that Read More …

Change deleted item retention period (Exchange Online)

On Exchange Online, if you’ve permanently deleted an item in Microsoft Outlook or Outlook Web App, the item is moved Read More …

MSI installer switches for silent software installation

Ever wonder what really goes on during a software installation? When you click Next, Next, Finish, what really happens under Read More …