sudo is probably the most used command in Ubuntu. In this post, I will show you how to make ‘sudo’ display funny and humorous error messages in Ubuntu Linux. To do that, you would only need to edit the /etc/sudoers : sudo nano /etc/sudoers Then find the line that starts with Defaults env_reset, add insults […]
Rainbow tables is a form of attack method used to crack stored cryptographic hashes commonly used as passwords in various application. It is similar to brute-force and dictionary attack that it will try to compare the resulting hash with the hash it attempts to crack, except in Rainbow tables, the possible matching hashes are all […]
I previously blogged about how to mine bitcoin in Ubuntu Linux using appropriate GPU. However, here are the video of professional bitcoin mining rigs used to generate bitcoin. The combine GPU processing power is capable of processing up to 48 Gigahash/sec! There are also mining rigs available for purchase from BitcoinRigs.com Further reading: Bitcoin Mining […]
Load balancing is a method to distribute workload across multiple computer over a network. The purpose of load balance in web server is to avoid one web server from being overwhelmed by requests which eventually leads the machine to come down to a crawling halt. Assuming that you have 3 web server to assign the […]
Fcrackzip is a tool that can be used to crack zip files encrypted with ZipCrypto algorithm through dictionary-based and brute-force attack. The brute force attack can be configured to use the combination of lower,upper, numerical characters or with other symbols or punctuation marks. Example usage: fcrackzip -u -v -l 1-6 -c a example.zip fcrackzip -u […]
Comment spam is the most annoying thing to web operators. Besides eating up bandwidth, comment spam can pollute web discussions area and which gives bad impression to visitors. Apache HTTPD mod_security module can be configured to reduce web spam by filtering common keyword, content and referrer used by spam bots around the internet. Here’s an […]