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Preventing Multiple Instances of a Script From Running Using flock 26 Aug 2013 | 05:11 am
Sometimes you want to limit a script to just one instance. Say the script accesses a resource that you don’t want to be shared. So how do you prevent multiple instances of a single script from running...
Finding Number of Unique IP Addresses Involved in an Attack 8 Aug 2013 | 10:41 am
Web servers sometimes get lots of requests from bots looking to exploit security holes. For example previously I have written about brute force WordPress login attempts. Attacks like these can involve...
Faysal Bank Introduces Dangerously Insecure Internet Banking 23 Jul 2013 | 04:07 am
Faysal Bank was probably the only private bank in Pakistan to not offer Internet banking. They were sitting on their hands all these years while their competitors leapt forward. But now they’ve introd...
Adding MD5Sum to KDE GUI Right-Click Menu 8 Jul 2013 | 04:47 pm
KDE is a great desktop environment and its killer feature has always been the great level of customization that you can perform. In this post I look at adding support for MD5, SHA256 and other file ch...
Upgrading from Debian Squeeze to Debian Wheezy 14 May 2013 | 08:47 pm
The latest Debian stable version named Wheezy was recently released. It is possible to upgrade from Squeeze to Wheezy without reinstalling the operating system from scratch. Let’s look at how that can...
Localhost as remote host in Apache log file 14 May 2013 | 04:21 pm
I recently noticed something weird in my Apache access log files. There were entries like this: abdussamad.com:80 localhost - - [09/May/2013:14:26:47 +0500] "POST /wp-login.php HTTP/1.0" 200 3784 "abd...
How to Find Linux Distribution and Linux Kernel Information 16 Apr 2013 | 01:05 am
Find out information about your Linux distribution, such as version, vendor and kernel version and architecture, using the Linux command line. Linux Distribution Information To find out which Linux di...
Add Brasero to KDE Right-Click Context Menu 6 Mar 2013 | 09:07 pm
Even though I use KDE as my desktop environment I find KDE’s K3b optical disk burning tool too buggy for my taste. Gnome’s Brasero, on the other hand, is simpler and works perfectly. K3b is well integ...
Stop Brute Force WordPress Login Attempts with Fail2Ban 5 Mar 2013 | 05:59 pm
WordPress is the most popular content management system for websites and as a result it attracts a lot of automated attempts at brute force login. Blocking such bots before they get very far is the to...
Debian Linux: Setting the timezone and synchronizing time with NTP 9 Feb 2013 | 03:43 am
I have previously written about setting the time and timezone in CentOS. Setting the timezone is much easier in Debian. Setting the timezone First take a look at your current time and date by running:...
