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 …

Linux – Removing Apache HTTP Server

Removing Apache HTTP Server ensures that, it’s existing files or services will not create conflict when we install Apache HTTP Server from the source code. Read More …

MacOS – Edit hosts file

If you are setting up a new web server or another device that’s going to be connected to the internet and you want to put it through its paces before it’s live, or if you’re having trouble with spyware and adware networks, there’s an invisible file on your Mac that can help. It’s called the hosts file, and this is how to use it. Read More …

Ubuntu 16.04 LTS Server – Configure Static IP Address

Send Us a Sign! (Contact Us!) Show More Info This article has total words. (Including header) Ubuntu 16.04 has been Read More …

Enable EPEL Repository (RHEL/CentOS 7.x/6.x/5.x)

EPEL (Extra Packages for Enterprise Linux) is open source and free community based repository project from Fedora team which provides 100% high quality add-on software packages for Linux distribution including RHEL (Red Hat Enterprise Linux), CentOS, and Scientific Linux. Read More …

Postfix – SMTP E-Mail Relay for Office 365

Postfix is a flexible mail server that is available on most Linux distribution. Though a full featured mail server, Postfix can also be used as a simple relay host to another mail server, or smart host. This tutorial will describe how to configure Postfix as a relay through Office 365 service, so using Exchange Online. Read More …

Nginx – Configuring Reverse Proxy

A reverse proxy is an in-the-middle proxy service which takes a client request, passes it on to one or more servers, and subsequently delivers the server’s response to the client: basically the communication will be only between the proxy and the client, there will be no direct traffic between these two endpoints. Read More …

Managing Uploads, Timeouts and PHP Limits in Nginx and Apache

There are software likes Apache, Nginx, PHP, and phpMyAdmin have multiple configuration settings that define and set limits to: Memory Usage (Allocation), PHP Script Run Times, Upload File Sizes. Read More …

SSH X-Forwarding (a more secure alternative to VNC)

X is a popular window system for Unix/Linux workstations (similar to explorer.exe for Windows systems), and one of its best features is its transparency. A great feature about using X is that you can run remote X applications that open their windows on your local display (and vice versa, running local applications on remote displays). 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 …