≡ Menu

Advanced ( Expert) Linux / Unix System Administrator

These tutorials assumes that you have rock solid understanding of Unix like operating systems and very comfortable with most aspects of the Unix/Linux such as networking/distributed computing environments,routing, firewalls, servers, client/server programming, and the design of consistent network-wide filesystems, load-balancers, security and much more. ( rss feed )

Set Up SSH Tunneling on a Linux / Unix / BSD Server To Bypass NAT

I‘m a new Linux / Unix system user. How can I set encrypted tunnel between my desktop/laptop computer and server in a remote data center to bypass the limits in a network? How do I create a reverse SSH tunnel on Unix-like systems?
[click to continue…]

{ 5 comments }

Linux / Unix: chroot Command Examples

chroot command

I am a new Linux and Unix user. How do I change the root directory of a command? How do I change the root directory of a process such as web-server using a chroot command to isolate file system? How do I use a chroot to recover password or fix the damaged Linux/Unix based environment?
[click to continue…]

{ 9 comments }

Linux: Log Suspicious Martian Packets / Un-routable Source Addresses

I run a web-server and I would like to log packets with un-routable source addresses on Linux operating system. How can I log spoofed packets on Debian / Ubuntu / CentOS / RHEL / Linux based server? How can I log a Martian packet (packet from Mars) on Linux operating systems?
[click to continue…]

{ 4 comments }

RHEL / CentOS 6.x KVM Virtualization Installation and Configuration Guide

How do I setup and manage a virtualized environment with Kernel based Virtual Machine (KVM) in CentOS or Red Hat Enterpise Linux version 6 server on IBM server? Can you provide step-by-step commands of how to install and manage Virtual Machines (VMs) on a physical server using KVM for RHEL/CentOS version 6.4?
[click to continue…]

{ 14 comments }

HowTo: Create a Self-Signed SSL Certificate on Nginx For CentOS / RHEL

I operate a small web site on Cloud server powered by CentOS Linux v6.4. I would like to encrypt my site’s information and create a more secure connection. How do I create a self-signed SSL certificate on Nginx for CentOS/Fedora or Red Hat Enterprise Linux based server?
[click to continue…]

{ 11 comments }

Debian / Ubuntu: Install Duplicity For Encrypted Backup In Cloud

My cloud based backup service provider has ssh access to the backup system. How do I install and configure duplicity software for remote backups in incremental and encrypted format on Debian or Ubuntu Linux based desktop / laptop / server?
[click to continue…]

{ 7 comments }

OS X Mountain Lion 10.8 Set Apache and PHP Web-Server

I am using Apple OS X Mountain Lion 10.8.4 on my Macbook pro. For my school project I need to write an app in PHP 5 and Apache. However, I am unable to find the Web Sharing option from the Sharing panel in System Preferences. How do I install Apache and PHP5 in OS X version 10.8.4? How do I enable HTTPD and test my web app?
[click to continue…]

{ 7 comments }